GADGETS

[@NEMOJA]

Thank you! This is the best explanation of using the overlay I've seen.

[@Backalleydiagnostics]

I just ordered the rotkee, figured for that price, it's a no brainer. Thanks for the vids and info as always!

[@adrianovergara1784]

Hi even though it is a very good looking test probe I still admire all your DIY projects because there’s a lot to learn from there. The simplest is the pulse probe from plastic pipe tubes and piezo discs. I proved to myself that I can do it with your tutorial videos. I would like to thank you for that and I am forever grateful.

[@theGADGETSplaylist]

Very kind words, Adriano and much appreciated:) The DIY is also more "serviceable". I've had to replace the piezo. There's also something to be said for a quality product for $17 What I try to do on the The GADGETS Playlist is feature affordable technology, whichever way we find it.

[@davidsantosdejesus7816]

@@theGADGETSplaylist Friend, I would like to be able to manufacture the sensor, you will have information on how I can do it, I would really appreciate it, friend.

[@theGADGETSplaylist]

@@davidsantosdejesus7816 the ROTKEE featured here is not very expensive, especially if you have other things you'd like thrown in the same order to help with split shipping cost GADGETS#132 is an easy DIY build if you or a friend has a 3D printer GADGETS#8, one of my very early videos shows how to build one using common ABS plumbing parts Good luck, David

[@davidsantosdejesus7816]

@@theGADGETSplaylist OK thanks friend, i will check your video

[@MechanicMindset]

Great video - I've got to get on the HScope! Love that little pulse sensor too. You're right about piezo, if you don't understand how they work, the readings can be baffling. Great explanation here, thanks!

[@theGADGETSplaylist]

If you have the time/inclination Darren, why not stop by out TELEGRAM HScope Group... I extend an invitation and would greet you there: t.me/hscope Hope you take me up on it:) Take care, Denis

[@MechanicMindset]

@@theGADGETSplaylist I’m in, cheers!

[@theGADGETSplaylist]

@@MechanicMindset pleased to hear it:)

[@davesage9190]

Great video and analysis Denis. I'm going to have to study this more. Nice work.

[@theGADGETSplaylist]

thx Dave:)

[@chriscadman5715]

Best explanation I've seen yet!

[@theGADGETSplaylist]

Glad you liked it Chris. I too am pleased with it:)

[@billyyoder8171]

Thank you sir. Good job. Have a blessed and safe week to you and your family.

[@theGADGETSplaylist]

Thank you for your comment, Billy:)

[@Spelter]

Thanks for that little trick, learned something new and love you videos

[@theGADGETSplaylist]

welcome my friend:)

[@rs1971camaro]

For DIY use the Rotkee looks like a winner. Nice use of the Hscope features !

[@theGADGETSplaylist]

Thx Jim:) Good products for professional mechanics as well. Great value!

[@carlosmatusmolina3002]

great video Denis!!!!! thanks for share

[@theGADGETSplaylist]

thank you, amigo:)

[@davidsantosdejesus7816]

Excellent information.

[@garaza24]

Thanks for video! One thing I don’t understand-where sensor gets voltage for working?

[@theGADGETSplaylist]

piezo disks have this property where they "generate" their own voltage when pressure applied upon them... you have a piezo disk in your smoke alarm...apply voltage to it and it can vibrate (noise) ... but reverse also true, if we vibrate disk then it makes voltage...

[@garaza24]

@@theGADGETSplaylist Thanks for reply!👍

[@paulpaquette1961]

Nice job Sir! On a running exhaust waveform at idle there is NO Phase shifting. Phase shifting happens at higher rpm. You can prove this out yourself. Take an idle capture, then take idle capture with injector unplugged. The misfire event will line up with the cylinder chart. BUT... Rev up to 3000 rpm with that injector unplugged and apply the cylinder chart and it will look like the next cylinder in the firing order is misfiring, when it is not!. A 4 CYL Phase shifts the misfire 90 degrees to the right, a 6 cyl 120 degrees to the right, and an 8 cyl 90 degrees to the right. Running exhaust waveform are at best good for identifying the misfiring cylinder. To see valve events, while applying the cylinder chart,. a cranking (fuel disabled) waveform display s the most valuable diagnostic information.

[@theGADGETSplaylist]

I have not done high RPM exhaust pulse tests...nor have I seen one on YT... Would you have a link to one, Paul?

[@paulpaquette1961]

@@theGADGETSplaylist I haven't seen a youtube video on it. So the process I describe above you can do it yourself. If you are synced ignition on Cyl 1 and unplug the injector(#1), at idle, your exhaust misfire will line up on the cylinder chart with the exhaust stroke of number 1. BUT, take the same capture at 2000 rpm+, now use the cylinder chart and the misfire will move to the right 90 degrees, so if your F.O. was 1342, it would show up as cyl cyl #3 on the overlay chart. Again you must try this yourself to "see" the proof. I can't state this enough, exhaust running waveforms are at most useful for cylinder Identification for misfires. A cranking exhaust waveform can reveal very useful information. For example on a V6, F.O 142536, the IVO & EVC for cyl 3, and EVO for cyl 1, with ignition sync on 1 with the overlay chart. I wonder if I just wrote a script for a short video? Hint...Hint. lol

[@theGADGETSplaylist]

@@paulpaquette1961 lol...if so, you'll find yourself in the credits:)

[@paulpaquette1961]

@@theGADGETSplaylist Don't credit me, the gentleman that explained this to me was Hans from Trained by Techs!!!! And naturally, I had to go prove it out.

[@theGADGETSplaylist]

@@paulpaquette1961 I smell some ignition advance and cam phaser influence in here. Why hasn't Hans and/or Trained by Techs done a video on this high RPM insight. No one else has, they'd have the whole field to themselves. When things warm up in shop (months from now) and have spare time, I'll have a look at it.

[@geovanybonilla2244]

Excellent simple and to the point explanation, where can I buy one of those transducers?

[@theGADGETSplaylist]

Can be purchased only directly from ROTKEE website. You will find link in video description box. Thanks so much for your kind comment, Geovany:)

[@TheDerekeder]

Very interesting! I have never done this kind of pressure measurement on an engine and wonder about the "rule of thumb" delay in the exhaust waveform relative to the timing reference. This phase shift is due to the physical properties of the exhaust system, non? What kind of information do you derive from these signals?

[@theGADGETSplaylist]

Not really a phase shift per se, Derek. The #1 sync is really undergoing its power stroke. That's why later (2 peaks later) it is then in its exhaust stroke.

[@TheDerekeder]

@@theGADGETSplaylist oh boy do I feel dum : )

[@theGADGETSplaylist]

@@TheDerekeder you're subscribed to theGADGETSplaylist. In my book, that makes you smart:)

[@Hscope-User]

Thank you Sr. For taking the time to put this togheter, you make it really easy to understand, That HScope is really nice and handy project , do you have a link of where you make the PCB for the project ( does that stuffing house has the gerber files that I can just order more to build mine) Take care Sr. And God Bless you and your Family you do a great JOB👍💪

[@theGADGETSplaylist]

There are 2 option builds for the HS402 each explained in #118 and #123. In the description box of those videos, you'll find a link where I host the GERGER files and other information. If you have this level of interest Ramon, you should seriously consider joining the TELEGRAM HScope Group: t.me/hscope This is challenging build and there is help available there:) Denis

[@romanosautomotive]

Very nice Denis. Super cheap for that Rotkee sensor 👌

[@theGADGETSplaylist]

real bargains, Rome take good care:)

[@NEMOJA]

Would a pressure pulse test be more accurate than a R.C. test since the engine is running during a pulse test. I haven't even got my hs502 yet but I feel like I already know how to use it

[@theGADGETSplaylist]

no...these are 2 separate tests RC tells us about compression pulse tells us about combustion

[@TheGibby3340]

Oh there is a lot going on here...I’ll have to watch this multiple times. Super interesting Denis.. At that price, I have no choice but to buy one 😀 Cheers Pal 👍

[@theGADGETSplaylist]

They make nice affordable stuff, Ian Check out some of their other cables and probes. Well priced. Adding a few of those helps make the shipping costs more palatable.

[@oldwrench4213]

Seems the engine is sound. Nice tool !

[@theGADGETSplaylist]

yeah, it's a problem making automotive videos with such fine running engines...lol

[@oldwrench4213]

@@theGADGETSplaylist indeed. When machinery is well maintained you have a hard time showing problems. I prefer saving money by investing in maintenance. In the long run you spend far less!

[@theGADGETSplaylist]

@@oldwrench4213 true that:)

[@philb2334]

You do good videos, not too long, straight to the point plus your voice is easy on the ear. I'm interested in the Rotkee gear & have tried contacting them through their webpage & their facebook page with no response. Would you consider them reliable? I'm debating whether to go for their MT Pro scope or a Pico non automotive. If they don't respond it'll have to be Pico.

[@theGADGETSplaylist]

MT PRO 4 has been out-of-stock for a while. They've been having trouble filling orders. This and some probes have recently undergone redesigned and intermittent stock issues. They do not take PayPal. Add items to the cart and on checkout, there are 4 payment options to chose from. Guys on our HScope Group report getting their orders in about 3 weeks time. Have not heard of anyone making payment and not getting their shipment. Make sure you understand the differences of MT PRO vs conventional USB oscilloscopes. They'll send me one (maybe) for review when stock situation improves. It's a lot of scope for $220 but it is not conventional. They could communicate better. But I think they are a small, honest company.

[@philb2334]

@@theGADGETSplaylist Thanks for the reply. According to their website the MT4 is supposed to be in stock on the 20th of this month. There isn't a lot of information regarding the scope, so when you say it's not conventional, what do you mean? I installed the scope software & can see that graphically it's a bit rough, other than that it appears ok. Cheers

[@theGADGETSplaylist]

@@philb2334 first of all, it is not a USB oscilloscope...it connects to laptop through ethernet port and thus has separate power requirement (can be supplied 5v through laptop USB) not all 8 channels are same...4 have 250 KHz bandwidth...the other 4 have 1MHz bandwidth and are "differential inputs" (+) and (-) and there's more...I don't have all the particulars...

[@philb2334]

@@theGADGETSplaylist I've decided against the MT4 in favour of the Autel MP480. I'm going to get the Rotkee leads & pressure sensors etc. Rotkee does accessories etc I haven't see elsewhere. I received a reply from them today, bit slow to respond to my initial message & is one reason I decided against their scope, otherwise they answered my questions. Keep up with the excellent videos :)

[@michaelfannin5456]

Nice video! This rotkee sensor seems like the way to go, I doubt you could make one for 17 bucks. I need to buy a bigger tablet for hscope and was wondering which tablet your using?

[@theGADGETSplaylist]

It's the LENOVO TAB 4. I love it and I've recommended it and the M10 to many people. Unfortunately, LENOVO has gone with MediaTek CPU and I am less inclined to recommend that. If you can find a discontinued model with the SNAPDRAGON CPU, grab it.

[@teflon121]

Is the combustion overlay available in any way for Linux?

[@theGADGETSplaylist]

I do not know of 1 for Linux there is a free one on Windows Store and PICO has one and of course, HScope has one

[@scientist100]

I purchased the in-cylinder transducer and I'm not getting any signal, any tips or tricks to get it to work? Thanks!

[@theGADGETSplaylist]

such a simple piezo based probe...strange no signal... difficult to discuss technical issues here in YT comment section...I invite you to join our HScope TELEGRAM group...I or others will be pleased to try to help out: t.me/hscope_automotive Denis

[@theGADGETSplaylist]

I just re-read your question and though posted on the PDS video I realize you're asking about the PS16 Pressure Transducer. Either way, the Telegram platform is best place to try to resolve it:)

[@baja-automotive]

when teaching delta sensors and the exhaust waveforms I have the students deactivate cylinders so they can see how the neighboring waveforms are effected

[@theGADGETSplaylist]

great for your students to see delta sensors react and that the disruption from a bad cylinder won't immediately settle down...

[@sivucit]

Hi i bought ROTKEE pds pulse transducer. can you pls explain how you have connected this to exhaust .. what kind of tube you recommend to connect to exhaust from pulse transducer. also can u explain where did you connected your intake ..

[@theGADGETSplaylist]

you'll notice I used a 1/2" ID braided hose for the exhaust test ... there's not that much heat there and it's not for that long so it can withstand it...and there are other similar sized hoses kicking around that might be even more heat tolerant also in this video I demonstrated using the PDS for crankcase test...just a small hose into the dipstick tube for intake PDS tests, the best 2 places are at the EVAP solenoid vacuum hose ...or...at the brake booster vacuum hose ... normally just engine crank tests since engine running at idle would produce high vacuum capable of damaging the piezo disk in the PDS

[@sivucit]

@@theGADGETSplaylist Thanks so much. is there a difference between firstlook sensor vs rotkee sensor. Also i have picscope 4 channel, can i use one for intake, 2nd for exhaust, 3rd crankcase and 4th to sync to find out the abnormalities during misfire.. thanks again much appreciated.

[@theGADGETSplaylist]

if you wanted to do intake PDS with engine running at idle, then disconnect air intake and have PDS take measurement upstream of throttle plate (between throttle and air filter) vacuum would be low there and no risk of piezo damage

[@theGADGETSplaylist]

@@sivucit First Look, Rotkee, DIY versions = all the same they all use a piezo disk

[@sivucit]

@@theGADGETSplaylist Thanks again..

[@guelmissalazar2626]

Where I can buy rotkee products.

[@theGADGETSplaylist]

ROTKEE sells directly from their website. No "middle man". rotkee.com/en Denis

[@nelsonrodriguez7101]

Hellow Denis, I would like to buy stuff from Rotkee, But how do I pay after buying it. And to whom I pay. Tell me how to go about it to pay.

[@theGADGETSplaylist]

They don't take PayPal but they offer 4 payment methods. Add items to your cart. And on CHECKOUT you'll see the options: TRANSFER WISE PAY SEND MONEY GRAM WESTERN UNION I have not used any of these options personally but members of the HScope Group have and it worked out Bill:) They make good stuff at great prices but their ordering procedure and their communication could be better. Denis

[@zeusbaezagil4500]

Buenas noches cómo puedo hacer para conseguir uno

[@theGADGETSplaylist]

puedes ordenar directamente desde ROTKEE.COM

[@mecanicaparatodos919]

Amigo como hago para comprar no responden mis correos

[@theGADGETSplaylist]

Sé que ROTKEE no es muy bueno respondiendo correos electrónicos. Recomiendo completar el formulario de pedido de los productos que desea y asegurarse de que estén en stock. Veo que el PDS ya está en stock. Algunos otros elementos no lo son.

[@idopshik]

Ты легко можешь сам сделать такой датчик из пьезо бипера и подходящего пластикового корпуса от какой нибудь банки. Немного клея, трубка и провод.

[@alcamerro]

Very good...

[@theGADGETSplaylist]

Thank You:)