Inside a hand grip strength tester - dynamometer.

[@robertsmiczsmiczamplificat593]

I use one all the time at my MS center. I have MS and they keep track of my strength. It gives them a heads up on a MS flare up.

[@paranoiia8]

Rumors says that Clive crushed his first love by hugging her too much... He still miss those Pliers...

[@paranoiia8]

@@Javajavajav don't assume Pliers gender just because she refer to her self "her"! 😁

[@nerdydev]

Corrine Wager we sure about that?

[@bigclivedotcom]

I've actually bent cheap pliers over a time of heavy use. The handles ended up almost touching rendering them useless.

[@rjgscotland]

george baker he's said in a Q&A video and hinted in other videos. (FWIW I am too 🤷‍♂️)

[@perolozac01]

The real trick is bending them back now

[@tinplategeek1058]

Clive - "I have a strong grip" - sounds like much misspent teenage years to me.

[@JUANKERR2000]

Misspent? I don't think so, just call me Juan Kerr ;-)))

[@bigclivedotcom]

Misspent in steelworks and construction sites. But also "that" too.

[@natalieobman5018]

If jacking off gives you a strong grip, you are doing everything wrong.

[@964tractorboy]

Steelworks and construction: that would do it. "Get strong or die trying", to paraphrase 50 pence. Beats my puny 38kg.

[@stuarthossack7906]

@@natalieobman5018 LOL!!!!!!

[@Uncle-Duncan-Shack]

I am average at using the crimper for insulated lugs, but I have a colleague who makes corkscrews out of six inch nails with bare hands. He would love to play with that.

[@piecrustyumyum]

I assume Paslode nails, surely not the full shiny metal ones.

[@Caluma122]

I've said it before and I'll say it again. I like that fact you show us the chips through the magnifier glass. Even if I can't see anything, it's satisfying that you try.

[@noisytim]

No way you’re 54! You look way way younger...

[@Cadwaladr]

I have a friend who's about the same age, doesn't look older than maybe 40. Some people are just lucky.

[@creamofbotulismsoup9900]

Just go easy on the booze, cigarettes, narcotics, UV light and kids, and you will probably have a good likelihood of having a similar result.

[@jk9554]

@@creamofbotulismsoup9900 "Just go easy on the UV light" he says to the one with the UV -desk- death lamp ("let's not look at that for too long, shall we? Oh yes, it's smelling distinctly of ozone now...") :p

[@creamofbotulismsoup9900]

@@jk9554 LOL, It's all about moderation...

[@gadi70]

...or a large family =)

[@seannot-telling9806]

Clive you must be very handy to have around when it comes to getting stuck tops off of jars of jelly and jam.

[@bigclivedotcom]

The only problem being the fear of actually breaking a jar in my hands.

[@seannot-telling9806]

@@bigclivedotcom That would not be good. With all the force to break a jar that way the glass would not be kind to the hands at all.

[@gregorythomas333]

I just did that a couple days ago...sliced the living shite out of my right index finger!

[@gregorythomas333]

I did...but the jar must have had a crack in it or something...it just shattered on me.

[@gregorythomas333]

Probably should have gone in for stitches but had it bandaged with a 3x3 folded and taped tightly. Bled like a stuck hog though..made a hell of a mess on the floor and counter top before getting bandaged.

[@JamesPawson]

Pro-tip for people who train/workout; if you are concerned that you haven't waited long enough since your last workout (haven't recovered enough to work out again,) check your grip strength. If it has decreased from your baseline (which you should have recorded before your last workout), you haven't recovered. Honestly, you could just squeeze a bathroom scale and record that number.

[@zturbo]

Jeff C's Master tips :-)

[@JamesPawson]

Haha, you got it!

[@ChrisD4335]

hmm, do you really need to fully recover in order to benefit from working on a different muscle group? I use to just did one group a day then a day of rest every week and got really really ripped

[@williamarmstrong7199]

In a lift designed for 8 people. 4 of us inside all normal weight. A body builder got in and it went over weight! He said "well that's a bit embarrassing" and had to get the life by himself ltr.

[@JaroslawFiliochowski]

I used to check with a bathroom scale, but you have to squeeze it with both hands at the same time and it maxed at 150Kg (75Kg per hand). This also seems better at checking which hand is stronger.

[@plasmaburndeath]

About time that Clive got a grip on this technology 😎

[@twocvbloke]

It's quite amazing how strain gauges work, so little movement, but able to record that much tension applied to the metal bar... :)

[@bigclivedotcom]

And really accurately too. I weigh the packages of kits and modules I sell on a set of cheap kitchen scales and the results exactly match the post office scales.

[@jeffreyhebert5604]

Love your stuff...helps me sleep at night after these old 60 year old bones work all day.ty again sir

[@LazerLord10]

I've been thinking about making a set of dance pads (like for Dance-dance revolution), using strain gauges like that to detect user input may work well (configurable threshold, no contacts, etc.). The only issue is that I need to detect the slightest of taps and withstand the hardest of stomps.

[@johnfrancisdoe1563]

LazerLord10 Those properties are all decided by the piece of slightly springy metal. Next you need to measure electrical values beyond the resulting range of deformation values (to allow correcting manufacturing variations in software). So I guess you will need a HiFi grade A/D converter that doesn't try to filter out DC on its own. The 12 bit A/D in most microcontrollers will probably not do the job of giving you a range from 50g to 2 ton with each of 9 pads checked every ms. Unless you make a more complex feedback circuit where the controller switches analog circuit parameters and set a trigger point for comparators that interrupts on slight change from previous state.

[@LazerLord10]

@@johnfrancisdoe1563 I'd probably just have an amplifier going to one of the analog channels and go from there. It honestly seems like the mechanical implementation (of everything) is more of a challenge than the electrics.

[@jonathanb3899]

@@LazerLord10 Hey commenter of three years ago! Did you ever find a chance to give this build a try? I went through my own period of wanting to build a dance pad/deck. Even built the frame in CAD. It resembles In The Groove II cabinet deck (way better than the crap Konami came up with). I wonder if I still have the build files 🤔 BUT I never figured out the surprisingly complex sensor mechanics. Lemme know! - A chance encounter friend

[@LazerLord10]

@@jonathanb3899 I did in fact build it! Send me an e mail thru my channel info and I'll let you know how it went!

[@steveoddlers9696]

Would love to see you solder SMD stuff! When you make a video about that, be sure to make it looong :)

[@randynovick7972]

Aye, Steve, me too. I'm terrible at it and need pointers.

[@gregorythomas333]

Hell's to the yeah! A couple hours would be a good start :)

[@Smegheid]

Funny you mention baggage scales; the same company also makes those.

[@PandaMan02]

its the same thing, just a hook instead of a hand grip.

[@JohnnyX50]

Last time I used a strain gauge was in an electronics workshop. We found a project using transistor followers and a gauge to allow you an almost endless amount of LEDs that went up and down as a solid bar graph to monitor the amount of 'bend' on the gauge. It was cool, it looked like the effect on K.I.T.Ts accelerator pedal in Knight Rider, only we used about 20 LEDs. There may have been a comparitor chip at the beginning of the chain, I can't really remember much about it. It was in the 90's LOL :D

[@HR-uc9bz]

I had something similar in the hospital. I was very weak and the dietician used something like this to test my strength. It wasn't electronic. It had like a tyre pressure type gauge on it. It was quite fun to use

[@Machoke.]

Same tool. I feel they’re a lot more accurate though. I went to school for healthcare. Nursing though. If you went for physical therapy you would have definitely seen a dynameter. I’m looking to get one, because I do a lot of grip training, and want a dynameter to measure me grip and see progress. Problem is the ones like the one you described can run upwards of 200$ or more, and I don’t really want to pull the trigger on a tool like that, that is really just more of a luxury. These digital ones seem to run for less than 40$ in a lot of cases, but I wonder how accurate they are

[@ADR69]

prolly the only time in history that "Camry" and "dyno" are in the same sentence

[@noisytim]

*high five*

[@lunchboxproductions1183]

kzbin.info/www/bejne/Zmimhmhod5qAjtE

[@RocRizzo]

Congratulations Clive, in getting your first 1/2 million subscribers!

[@opticaltrace4382]

My favorite strain gauges are fibre optic ones. Strain measured by the refractive index of light

[@merlinathrawes6191]

Love that circuit board at 8:49. Flipped over and showing the IC's, it looks like a steampunk/retro robot head with the wires coming out the sides as antennae. Splendid!

[@phils4634]

Our Physios and Occ. Therapists use these a LOT in Rehab. Ours are built by Welch Allyn, cost a small fortune, and have USB connectivity to allow Patient Monitoring (via an equally expensive Welch Allyn software interface box!). Probably no different to Clive's but ours are at least ten times as much simply because they are "genuine" Medical Devices!

[@matthewmiller6068]

Hands like vices...vice of knowledge... clearly hands of knowledge is appropriate given how much you learn and teach by taking things to bits on your channel!

[@wktodd]

should be in newtons ?

[@izimsi]

seems like kgf, of course it's implied, nobody knows what force's unit is :)

[@bigclivedotcom]

Add a zero to kg for a close approximation.

[@gordonlawrence4749]

@Bill Todd Problem is most average people don't use newtons as units. I have had to explain force in terms of the weight of bags of sugar before now

[@233kosta]

Aye, it would be, except it's aimed at athletes, gym-goers and Joe-public, not physicists and engineers. Much like dashboards in cars - never have the curious bits you'd want to know like exhaust gas temperature, pressure drop across cat/DPF, turbo pressure/temperature ratio (both sides!), manifold pressure, oil temperature, etc. Rather annoyingly!

[@matthewmiller6068]

@@gordonlawrence4749 oddly I have never considered newtons as a measure of weight like pounds but the torque specs on the lawnmower blades are newton meters in the manual...

[@JerryEricsson]

Back in '93 I was seriously injured in an accident. Since it was in the line of duty, Workers Comp kicked in and decided to test me to see if I was telling the truth, well me and the surgeon who operated on me to correct the damage, so they sent me through a series of "functional capacity" tests. The grip test was one of the many tests they had me perform over the 2 day process. Back then they used a rather large chrome plated device that weighed in at about six pounds and had a dial meter on it with a stop needle that would freeze at the strongest point. The tests were designed, not only to test your physical strength and ability but were set up with a sort of double purpose to insure you were not holding back, since holding back on one test might show in another test down the line. Being an honest person, and not trying to fake an injury following the three major surgeries it took to get me walking again, I passed the tests, and Workers Comp was happy for a month or to before the began another round of their pscyh warfare against the worker. In the end, a wonderful lawyer and understanding judge awarded me the 100% disability that all the tests indicated I should have. Oh add in another 2 years where the bureau sent me to college to be retrained from a police officer to a paralegal, and while I passed the course with a 4.0 GPA, I could not buy a job because of my disability and advanced age (I was near police retirement age at the time of the accident.

[@clusterfork]

I like when you read out the full titles of eBay listings. I do that too, usually in a voice that pretends it isn't just keyword spam.

[@LostBeetle]

I'm getting one, I fractured my right hand and needed pins. When the cast came off it was hand therapy, and at the end of five weeks of hand therapy I managed 66lbs with my right hand (the one that was broken), and 135lbs with my left. I wonder what my right was before the fracture happened. Thanks for the review, I just ordered it and now it just needs to ship.

[@coloradostrong8285]

What did you get your right hand strength up to, according to your meter?

[@LostBeetle]

@@coloradostrong8285 Highest I got it to was 143, on a good day. Seems to peak after a good session of archery or not long after a workout started. So once again stronger than my left. Less flexibility which looks like it will be permanent, can't open it quite as far, but it makes zero difference in day to day activities. Rarely any pain.

[@johnfrancisdoe1563]

Calibration tables may be stored in the external flash, along with physiological reference tables for age/gender combinations. This might exceed the μC flash capacity. For lesser strain gauge products, rougher scales and no physiology data would be enough.

[@SteveNinetyski]

Nice strength for an older chap😁 I'm 34 and weigh 78kg. I bought this exact dynamometer last week and my highest recording is 68.5kg so quite happy with that.

[@Sean.224]

Is 109-111 lbs good for a 19 year old?

[@davij-gaming]

@@Sean.224 Is just a little bit above the average for this age group, which is 101 lbs. I have this dynamometer and to be considered strong you must put at least 123 lbs!

[@MD4564]

"Useful, let's take it to bits" - 2019 Clive :)

[@عمرالقططي-ه3ع]

ز

[@Cloudy5.0]

Clive's 54? Damn, I would've guessed he was at least 10 years younger.

[@GR46404]

He might be 54 in the metric system. I think the conversion is .62 to one. Also, in the UK they have some strange unit called "stones" Maybe his age is 54 stones? IDK what that would be in real years.

[@Anvilshock]

@@GR46404 Wednesday.

[@Chris_the_Muso]

@@GR46404 Well there's something called "the stone age". I think he may actually be Methuselah

[@GRBtutorials]

GR46404 The stone is a mass unit

[@GR46404]

OK, GRBTutorials, now it is ON. I thought that the stone was equal to 14 pounds, and was therefore a weight unit, not a mass unit. By doing so, I wish to make it clear that I was once the kind of person who had knew the difference between weight and mass, and was therefore able to make irritatingly nitpicky distinctions that I myself forgot 99.9% of the time. I apologize for crushing you intellectually, but you asked for it.

[@PushyPawn]

Ever since my relationship ended, my grip strength has gone through the roof. A shame it only improved on one hand.

[@mgsamps]

You can also use old bathroom scales to test and improve your hand/finger strength, we used to do it all the time as teenagers and I managed a respectable 14stone pressure, not too shabby for just palms and fingers.

[@Cryss777712]

61kg?! Last time i used this in high school i was so happy for my 32kg on right hand and 29kg on left hand...

[@Frankiarmz]

Amazingly thorough review ! Thank you !

[@dannychouinard5819]

Hello Clive. The calibration is done at the factory, where the gauge is strained to a few known amounts and the results are stored in the EEPROM as a look-up table. The rest is simple extrapolation. Pretty simple.

[@LiamB1708]

Wow, I've just noticed you're nearly at half a mil subs. Congratulations Clive, you big strong bear!

[@kilovwdude6457]

Yo I'm stoned and I have no clue why I watch your videos but I love em anyway your almost at 500k so that's cool

[@PiOfficial]

Kilovw Dude cool story

[@Hollegripchannel]

Hello Clive , do you think you could increase the range of strength on this dynamometer say to 200kg?

[@bigclivedotcom]

You can buy load weighing strain garage assemblies.

[@Hollegripchannel]

bigclivedotcom not to bother too much , but could I just swap it over ? And would I be able upgrade the display? As after 90kg it says error

[@bigclivedotcom]

@@Hollegripchannel I wouldn't trust the plastic if using it at very high grip strength.

[@Hollegripchannel]

bigclivedotcom have you got an email address if you don’t mind me picking your brain ?

[@Hollegripchannel]

bigclivedotcom hi Clive , mine just arrived. Do you think it’s possible to upgrade this so it can go up to 200kg and register that on its screen

[@JustinLewisyoostin]

10:17 "Quite fun at parties" - This would be ideal for the customary Festivus practice of "Feats of Strength".

[@ManWithBeard1990]

Interesting thing about strain gauges by the way: typically you would want to set them up in a Wheatstone bridge kind of arrangement as you said, but there are several ways of going about it. The best way is to have two opposing gauges parallel to the direction of elongation, and two perpendicular. So two of them have a resistance increase and two have a resistance decrease as the thing deforms, yielding the largest voltage difference in the bridge. However, you also have half-bridges where miniaturization is important, comparable to a simple voltage divider, and up to all but one of the strain gauges could be replaced by a dummy or a matching resistor, to save cost. If you were to remove that white silastic you'd likely see this bridge arrangement split over both sides. I'm actually kind of surprised by how it's constructed. If it was me I'd have molded in a somewhat sharper point for both ends of the aluminium bar to rest on so you wouldn't have to worry about nonlinearities as the plastic deforms. But I guess they tested it and decided it was good enough for what it's for.

[@OrangeHex.]

Bring it the the next Manx beard club

[@amorphuc]

That would be fun.

[@martinda7446]

I have a mate who seems to be made of different material to the rest of us, (A northerner) He can crush anything in his hands, I remember seeing him explode an apple, maybe not the most difficult test but I was impressed.

[@WobblycogsUk]

I'm going to guess the milled out sectioning the aluminium bar are there to ensure the maximum movement of the bar happens under the sensors. If the milled out sections weren't there the bar would bend evenly over it's length. With this set up it would bend more where the cut outs are which, I assume, would increase accuracy.

[@reprobite]

Watched your video, mine just arrived and I got 47Kg and you are 20 years older than me. Time for me to start training these small hands!

[@nicolek4076]

Thank you for the Kg conversion. I may be old, but I work in metric.

[@morelenmir]

If you are looking at trying SMT soldering and want a kit to start off with then I highly recommend what the search phrase 'DIY Kit Red LED Dot Matrix Clock SMD Kit Parts C51MCU w/ Acrylic Box' finds you on ebay (uk). Mine cost just under £10, but you can probably get the same or similar from BangGood or AliExpress for somewhat less. There may well even be different colour variants if you prefer. In fact the bare circuit and PCB template is probably available on an electronics forum somewhere if you know how and where to look. What you get is an all-but 100% SMT project that uses something like 370 surface mount LED's to make a dot-matrix display--along with a dozen or so other, 74-series logic, micro-controller and passive components to actually run it. The LED's have the '0603 ' form factor and pretty much demand some kind of 'Optiviser'-style magnifier and a fine pair of non-magnetic tweezers to solder them down accurately. However once you get into the swing of it the whole kit is massively enjoyable to build, especially because the rest of the parts that matter are '0805' or TSOP 6/16/28--which feel huge when you come to them fresh off the LED 'face'! The only through-hole components are a couple of tactile switches, a thermistor, a light sensor and the USB socket. It really is just the ticket if you want something to simultaneously hone your soldering skills and build your SMT confidence upon.

[@SagePatrynXX]

had to use the old fashioned hydrophilic type for rehab after my first of two tennis elbow surgeries (so naturally this is the first thing she hands me. ) before and after rehab. then thus the exercising spinball that lights up once you get it going. Want a sore arm? and the pros supposedly don't need the string, some light up some don't and avoid the auto starts.. and sometimes you don't pull the string right . (it goes in don't lose it. ) I thought the one I got was so good I got the therapist one cause she'd always wanted one that lights up.

[@bigclivedotcom]

I like those things, but I always burn them out. The track the spindle runs in gets worn away quickly when I rev them up with unreasonable force. I usually start them by swiping them down my trouser leg.

[@SagePatrynXX]

@@bigclivedotcom guess I'll have to try harder to burn them out. once I get the elbows in order :)

[@Gooberslot]

I hope you're going to make a video on that surface mount project.

[@austinwilliams8666]

Was there any marking on the load cell to indicate manufacturer? Do you think this was custom made? I haven't been able to find anything that would meet these specs.

[@bigclivedotcom]

It will possibly be a standard cell. But finding them being sold individually to consumers is tricky.

[@AwsomeVids83]

Congratulations in advance on 500k subs!

[@andymouse]

I'm getting to grips with surface mount to, I look forward to your project....etch resist pen, or CAD?

[@bigclivedotcom]

CAD. So much neater.

[@danielchandler15]

Really interesting didn't even know this device existed thank you Clive. I thought it was just for that Adam's family test your grip game from back in the arcade days.

[@AntonioClaudioMichael]

Great video big Clive

[@gordonlawrence4749]

There is a "bodge it and scarper" method of using a standard microcontroller for a 4 element strain gage. VCC and 0V to the top and bottom of the wheatstone bridge then the outputs go to two analogue inputs (preferably 12 or 16 bit). On zero load they should have the same value. As the load goes up, one input voltage decreases while the other increases. Twice the resolution (in theory) of just measuring one, which would also be a git for bias loading. In reality it's never as good as using a differential amp and an INA132 would work reasonably in this situation. The only issue is drift as the batteries run down. IE the tiny amount of heat in say a 1k setup (1k per element) would vary dependant on voltage and the individual resistive elements, usually this is to an extent compensated out but to get 1% accuracy over battery range and temp range is a right pain in the neck.

[@dantuck5242]

Would this measure accurately if you hung it from the ceiling and suspended a weight from it

[@bigclivedotcom]

It should, but it would need a solid attachment if the weight was going to be heavy. A set of digital luggage scales might be a better option.

[@PsiQ]

Soo. How good is the sensor/measurement ? Could you test it by hanging it upright, and putting some water bottles as weight on it as a reference ? Does not really matter if it is that exact, but will it show 10x if its 10liters instead of one ?

[@liudas5377]

Wow Clive, we are the same age. I figured you being way younger. Must be that cold house you live in keeps you well preserved....

[@bigclivedotcom]

And the lack of a family.

[@bigclivedotcom]

@Undefined Lastname Yes you are.

[@jimmystardawg1506]

Can you review some led grow lights

[@DeliveryMcGee]

"the usual suspects"funny way of saying "The usual scumbags"

[@johnfrancisdoe1563]

Delivery McGee It's a common police phrase, famously quoted in the movie Casablanca. It doesn't imply certain guilt, but does indicate a likelihood of getting arrested and charged.

[@bakonfreek]

I think my dad used to have one that had a lot more movement to it. To be fair though, that one was an analog unit with much more physical resistance but much more sensitive measurey bits.

[@MERCKXWOOD]

You must be raking in the money with almost 500,000 subscriber's! 😲 I do enjoy your video's! 😉

[@raymondmucklow3793]

At 14 my dad had got into car accident, the chiropractor had a mechanical hand strength gauge, so he gave it to my dad made him squeeze it 3 times both hands. The chiropractor said o man you rate with most Olympic athletes (weight lifting). Then I knew why I would cry when he tickled us, or my ribs would hurt for 12 hours after tickling us, he would do the hand vise grip on our heads I swear I could feel my head squeeze.

[@konsul2006]

Now that's a real dad! :)

[@Mr.Unacceptable]

Since washing Windows with a 40lb 80foot pole I have buried every handshake tester I've run into. The first time I thought someone was messing with me. Everyone around couldn't get it half way. My Ex just kept saying You don't realize your hands are so strong.

[@tncorgi92]

@@Mr.Unacceptable 80 foot pole? That's 8 stories.

[@Mr.Unacceptable]

@@tncorgi92 Yup it's called a tucker pole

[@dj1NM3]

@@Mr.Unacceptable Then there's that one twit in the office who tries their "crushing" handshake (or at least as the bulging vein on their temple seemed to indicate...), then that un-nerving "crunchy" feeling from the cartlidge in their hand when you "return the favour" and their face goes a bit pale.

[@randynovick7972]

Really looking forward to a nice rundown on surface-mount handiwork and best practices. I watched Dave Jones' rundown and it's okay (as is Mr. Carlson's) but I can't get those results.

[@bigclivedotcom]

Mine will involve an ordinary soldering iron and solder.

[@Darieee]

Left hand any different???

[@bigclivedotcom]

Just 5 pounds.

[@harrislondon]

Just got one of these. Left hand comes out as 59kg right hand 72kg. Is there any set way to hold via hand size etc like finger position for best most accurate results?

[@madbstard1]

Every Big Clive video - chat, chat, chat, chat, chat, chat....let's take it apart :D And that's what we love!

[@pointbky]

If youre interested in grip strength look up the captains of crush hand grippers. Theres a 1,2,3 levels with increments inbetween. About 100 people have ever closed a 3. Might be a good test

[@Zenodilodon]

Hands like vices, 100% something you can't simply teach a person. This has sometimes become a problem to overcome when teaching others it takes a long time to gain strength and dexterity. The truth is sometimes the vice is safer cause it also instantly stop, sometimes the hands keep going and that can lead to interesting times.

[@Slikx666]

Clive. Does it say what the maximum rating is? Also what would win this machine Vs Eddy Hall?

[@bigclivedotcom]

I'd certainly like to see Eddy Hall try it.

[@Slikx666]

@@bigclivedotcom Me too.

[@Hauketal]

See BC read the description at 0:21 for the limits.

[@Slikx666]

@@Hauketal Brain farted 😮

[@steviebboy69]

It says on the box ISO 9001, is it a Dyno for a Camry as in the Car.

[@darronjknight]

Clive, could you possibly review the flexible led motorcycle rear/brake lights with indicators that you can find on ebay for less than a couple of quid?

[@NocturnalRS]

what kinda mic do you have , sounds great.

[@bigclivedotcom]

Custom, based on a sensitive insert built into a small jack plug.

[@johnopalko5223]

Why do they "blob" chips? Is it to protect the chip from the environment or just to keep people from reverse engineering it?

[@dannooo548]

It's a lot cheaper than a real package. What's underneath the blob would hardly survive existing. It's just a bare die with gold Bond wires welded between the die and pcb

[@bigclivedotcom]

It's the original COB (Chip On Board). Instead of adding the IC as a separate package they bond the bare chip onto the PCB and then link from the IC contacts to the PCB pads with bond wires. The black resin is to protect the chip and delicate bond wires and shield it from light too. (Light can influence a bare chip.)

[@johnopalko5223]

I never knew that. Thanks, guys! Learn something new every day.

[@dannooo548]

@@bigclivedotcom There's an eevblog video where Dave talks about camera flashes resetting a Raspberry Pi since it bounces into the bottom of some BGA or something like that.

[@Xplasma1]

I have the distinction of having broken a grip tester once. It was one of those ones where you put in a quarter and test your grip for fun. I gripped it so hard all the LED's lit up, and the machine kept saying "I think I felt something" over and over again. The restaurant staff had to unplug it. I also know first hand about pinching your hands with pliers! I've also had vice grips break on me, making my hand slip and cause injury and bleeding. Not fun. Thinking about it I am rather hard on tools, and chairs, and clothes...

[@bigclivedotcom]

This is why I always assess chairs before sitting on them. And I usually choose work clothing because it's stronger than clothing intended for common mortals.

[@AndrewGillard]

That COB blob probably isn't a "normal" microcontroller, because those typically only have ADCs up to about 10 or 12 bits of resolution which I wouldn't have thought would be enough for a strain gauge/load cell. At least, the load cells on AliExpress are typically sold with, or recommended to be used with, Avia Semiconductor's HX711 ADC IC ( datasheet: cdn.sparkfun.com/datasheets/Sensors/ForceFlex/hx711_english.pdf ), which is a *24-bit* ADC with a programmable gain amplifier (PGA) with gain options of 32, 64, and 128. So I wonder if it's using a special microcontroller with a high-resolution ADC, or if there are maybe two silicon die under that blob? Or can load cells be usefully read with a standard 10-12-bit ADC, and the HX711 is used only for the additional accuracy?! (Certainly the "100g resolution with 90kg max load" specs on that device don't exactly scream "high-resolution!" :))

[@bigclivedotcom]

My guess is that its a microcontroller dedicated to the task of mass produced weighing scales like kitchen and luggage scales. It makes sense to incorporate the sensing and LCD drive into a single chip with suitable power management facilities. The external memory chip is a bit odd though. I would have thought the microcontroller might have had at least a few memory locations for storing a calibration value.

[@OrangeApocalypse]

Those look like a good idea. They should have something to test actual patience having to wait in a hospital too

[@tamgaming9861]

Great, can you explain how the display gets the power and information to display?

[@Cadwaladr]

There's a little conductive rubber pad called a zebra strip.

[@tamgaming9861]

@@Cadwaladr thank you :-)

[@nobo1682]

do you know how to take it apart and put it in a isochain diy

[@lukasneves8209]

How does this work? I mean i can hang with one arm and 50kg additional weight( 130kg) in total but just 60kg with dynamometer. How is this possible? Is it different?

[@bigclivedotcom]

This measures hand closing force as opposed to just the holding force of hanging from a bar.

[@tybofborg]

"having the blob do all the work" - man, the Elder Things probably find this amusing. We have our own Shoggoths now.

[@arfyness]

*WOO-HOO! Half a Million Subs!*

[@stanmarsh14]

Used various versions of this before, especially after I broken my left arm in a road accident, and it certainly showed how crap the grip strength in my left arm is..... think it was around 13KG I was rating, yet the right was easily 4 times that.

[@worldofrandometry6912]

Some of you need to get a grip. :-)

[@Falaxuper]

Take your upvote and leave

[@gibbyace5077]

I get a grip On my wheel And on my Penis from time to time

[@rusty-]

Should have load tested it on the Vice of Knowledge to see how far it goes before it breaks :)

[@DeadkingAZ]

134 sitting down like it was nothing. Impressive!!!!!

[@gordonbrown2204]

Dam! 60Kg. My friend just got one of these last week (we are climbers), I got just over 60kg and he was sitting at 58kg. Welldone!

[@WacticalTactical]

"They look like big, good, strong hands, don't they?"

[@Roalethiago]

In Brazil u need to do this test for the National drivers license, i think it is to see if u have enough strength to hold the steering wheel in case of roll or something like that.

[@coloradostrong8285]

🤣 ⛐⛐

[@Dennan]

i always knew clive was strong, but holy damn, 60 kg hand grip, thats very impressive

[@3d1e00]

My mate had a 350lb grip that I could do but I wonder if they are easier because they are angled or poorly calibrated. Would be annoyed if I got one of these and was always over max.

[@MushookieMan]

That's probably just a marketing lie. Maybe it's "350" lbs if you put your hand in a very specific spot, and close the grip all the way. The issue with those is moving your hand to a different position changes your leverage.

[@simontay4851]

60KG grip strength. Thats impressive. I wish my hands were that strong. How do you build strength in your hand/finger muscles? What exercise do you do? My right arm/hand is naturally slightly stronger than my left.

[@bigclivedotcom]

I don't actually do hand exercises. My hands just seem to be naturally quite strong.

Nature is wonderful you have a crushing powerful hand and yet can pickup small screws or an egg. Man cannot as yet copy it.

[@JAWZxz]

Yes they can? Robotics have far surpassed human dexterity

@@@JAWZxz Not yet they have not. Prosthetic hands are still not as good as the real thing.

[@apbosh1]

Why copy when you have it already? A bit like tele kinetics. You can move things with your mind, it just sends instructions to your body.

@@@apbosh1 I hope you posted the comment using tele kinetics?

[@JAWZxz]

@ who said anything about prosthetic hands? The issue with prostheses is actually interfacing with its user. Look at any industrial robot, humans have been far surpassed. You're moving the goalposts

[@pcbms6682]

You should check out the tools from IFixit.

[@HyperSuperBothi]

These are also used in hungarian schools. We have a mandatory nationwide student health test system (called Netfit) and among other things, PE teachers need to measure hand grip strength with these things (AFAIK there's one of these sent to every school)

[@getyerspn]

Comes from stripping cables and handling large swa allot ... Gives you a hell of a grip .. I used to get called Edward spanner hands among other names...no my name's not Edward..

[@electroniquepassion]

Thank merci

[@jwalster9412]

?

[@bullymaguire827]

Is 75 kg good for grip strength.

[@deeeeeeps]

Got this same gripper under the name GripX on amazon...It kind of feels cheap my hand barely fits between the handle 3-1/4" space. Got 169lbs my first time so I'm almost maxing this machine out already.

[@scslre]

David Sanders Are you sure it was the same one? I have one of these too and it feels pretty solid.

[@jreding132]

Why the 'blob' on the chip? To keep the design secret?

[@bigclivedotcom]

To protect it from physical damage and light as it's just a bare silicon chip.

[@JimmyJinky67]

head to 8:20 for some optical gratification.