Make a Resistor Substitution Box! - The Learning Circuit

[@twistedsymphony]

Pro Tip: put heat-shrink tube over each jaw on your helping hands to keep from scratching up your PCBs.

[@MadsonOnTheWeb]

Nice tip. I don't think it would be a problem in this particular circuit. But yes, in something different could be a big deal.

[@sierrapadilla808]

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[@mugglepower]

never thought I'd be watching someone soldering resistors to a PCB at 4am when I went from liberal arts to material science in college.

[@AirborneSurfer]

I've been meaning to build a decade box for a while now; I may have to grab one of these kits!

[@james77011]

😀😃 i made this kit about seven years ago 🥰😍

[@naderhumood1199]

Wow nice series karen I like ...it's great ☺

[@Corbald]

Could you please show us how the Resistor Substitution Box works in practice?

[@Tom-nm6qf]

Suppose you were trying to light an LED, and you know you need a resistor before it, and you want to try different values to see what resistor value will give you the suitable brightness that you desire from the LED. Connect your circuit to the alligator clips where you would normally connect the leads of an individual resistor (polarity doesn't matter, they are still just resistors). Then just use the dials to select different resistor values to see what effect they have on the brightness of the LED.

[@Corbald]

o.O I never thought of that! I thought of using a pot then just measuring the resistance across it. I like the box gives you discreet values that match your existing resistors, but my meter is probably already on, draining my batteries anyway, and you can just swap the wire on the breadboard to an analogue input on an arduino to measure the resistance, right?

[@pctuterman1]

@@Tom-nm6qf Awesome explanation Tom. I had the same question as Corbald. You cleared it up for me.

[@abdulwahid8579]

Good start and a knowledgeable career ahead for all.

[@davidlord5739]

My old USAF high reliability soldering instructor would say, "A Glob will do the Job!". :)

[@alfonssiggler6652]

Nice 'gadget' :) ... I like this series about basic stuff even if i dont really need it :D ... But its very good for people with no or not much knowledge and experience 👌🏻 Keep going on! :)

[@abdulwahid8579]

I really love your teaching.

[@denniswilbanks1914]

Your videos are good and your explanations are easy to grasp and understand. It is evident that you all put in a lot of preparation time. I suggest that you list credits for the music. I really like the guitar music in the back ground and would like to buy it on iTunes. What is the name of the song and who is the guitarist ?

[@electronbob6676]

What a great idea ... thanks for sharing!

[@TheWP]

Look up 'DIY Resistance Decade Thumbwheel Resistor Adapters' on Tindie. They provide much higher precision and it's a cheaper solution.

[@MrCardeso]

Thanks, Karen!

[@zongyang779]

I made one but never understand how to use it

[@syedyousufhussain4577]

please give me the idea related to biomedical instrumentation project

[@abdulwahid8579]

Great learning

[@danielghani3903]

tak puan, tadi bukan cheap hype atau apa2, sy respond sbb risau sahaja. Sbb kita tak tahu keadaan macam mana, kalau ada sesiapa menyampah pun tak apa, asalkan boleh buat apa2 untuk bantu

[@jitenderbedi8425]

NICE 👍

[@whatarewedoing0]

how do they make diff resistors to have diff values?

[@MAYERMAKES]

The easiest way is to take wire with a known resistance and spool it until you reach the desired value. Most resistors ger made with coal or metaloxide as resistive element.

[@lesliefranklin1870]

Great job! I see you didn't panic. :-P

[@terenceedwards5175]

there is an eaiser way by using an array of pots

[@GojoSenpai25]

Yeah check the resistors after soldering when you should check if they work BEFORE soldering sheesh

[@turkeydale2380]

Yayy

[@AnandKumar-ym9yw]

02:26 who is playing guitar, when she is doing soldering

[@tianharvan]

I like it ,want to order it ! BUT 25 euros just to sent it ! ,that's a real bummer .It costs 19,95 + 25 No way Jose .I'm so sorry .

[@MAYERMAKES]

Thats only if it gets sent from the US. Look up the element14 vendor in your country, thats much cheaper. Where are you located?

[@tianharvan]

Ok that's a nice tip ,I didn't no .Thank !

[@reiner0609]

Unfortunately that is not an option in Germany as Farnell/Element14 only sells to companies here and not to individuals.

[@TheWP]

Look up 'DIY Resistance Decade Thumbwheel Resistor Adapters' on Tindie. They provide much higher precision and it's a cheaper solution.

[@tianharvan]

I'm Dutch .

[@justrandom4924]

I didnt really like this opening announcer.

[@gr33n357]

Eh

[@gr33n357]

.eh

[@gr33n357]

Meh

[@dtnicholls1]

Try making sure the person doing the soldering actually knows how to solder eh? Clinch leads, trim, apply heat to the joint, apply solder to the joint (NOT the iron!), remove solder and heat.

[@TheRevolucas]

No reason to trim before soldering in a non critical application.

[@dtnicholls1]

@@TheRevolucas Yes, there is. You learn to do it right and then you always do it right. Order of operations and simple changes to technique will see a far superior joint with less chance of dry joints etc. There's no need for clean rooms and all that but to not use proper technique is inexcusable when you purport to know what you're doing and represent a company like element 14