Transistors "Survival Kit" and Tutorial for Makers



“Which transistor will work with my project?” Mouser alone lists different 37000 types. We will reduce this number to a “survival kit” for our lab. To do that, we give a little background and do some experiments.
In this video we will:
– Focus on Arduino and ESP projects
– Look at the technology behind the transistors to distinguish the needed from the “nice-to-have”
– Do some tests in typical applications
– And finally, provide rules of thumb and a “survival kit” for your lab

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Links:
N-Channel:
IRF3708 (TO-220) https://s.click.aliexpress.com/e/_DCdJWBV
Si2302DS (SMD) http://s.click.aliexpress.com/e/_s7Z334

P-Channel:
NDP6020P (TO-220) http://s.click.aliexpress.com/e/_rvulr8
Si2301 (SMD) http://s.click.aliexpress.com/e/_sAd55C

Transistor Curve Tracer: https://amzn.to/3biWrUl or https://ebay.us/7BHfW2

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24 thoughts on “Transistors "Survival Kit" and Tutorial for Makers

  • August 7, 2022 at 10:58 am
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    I am still in my summer break. As last year I show some interesting videos from the past (as mentioned in the intro)

    Reply
  • August 7, 2022 at 10:58 am
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    Invention of transistor was probably the biggest milestone in the electronics world – can we imagine today processors built on tubes? 😉

    At 4:57 & 9:00 – this diagram has no ways to work without … grounds connected 😉

    Also: very simple but quite needed for ESP: programmer (if you don't use ESP modules but ESP boards for the project) – you still need 2x NPN for auto programming (without pressing BOOT or if you don't have it/don't want to have it) – it requires 2 BJTs – I am not sure they can be simply replaced by FETs.

    MOSFET transistors in serious projects are always driven by MOSFET drivers (specific ICs for this purpose) – controlling MOSFETs is not as trivial as one would think – especially when we talk PWM with high frequency – probably one more parameter should be considered while choosing the transistor type: Avalanche Energy

    Reply
  • August 7, 2022 at 10:58 am
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    My gut twitches every time I see that creepy pointing hand. Otherwise thanks for the excellent video! 🙂

    Reply
  • August 7, 2022 at 10:58 am
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    Hi!
    Thanks for sharing the links to the ones you use. The link to the IRF3708 is broken. Can you review it?

    Reply
  • August 7, 2022 at 10:58 am
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    Hi Andreas, I would not render NPN and PNP totally useless. I often create small, switchable current sources by using them with an emitter resistor and an LED or two Diodes (as a voltage reference) between base and GND. With a red LED (1,6V), you can easily get the current drawn by the collector with approx. 1V/R.
    With 100R as an emitter resistor, you get a 10mA current source, perfect for driving and switching an LED with an unknown (e.g. 3…50V) supply voltage. This would be way more effort with a FET.
    For driving well defined low to medium currents I usually only use BJTs.

    Reply
  • August 7, 2022 at 10:58 am
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    I've used the RFP12N10L with Arduinos as a good logic level N-Channel: FET in TO-220 package. Readily available for about £1 each (10 pieces) from all the major suppliers, RS, Farnell, Mouser, Digi-Key etc.

    Reply
  • August 7, 2022 at 10:58 am
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    I will agree FET's are likely the most functional of transistors in the lab, but there are definitely applications where BJT's would be the better choice.
    Thanks for a great comparison and educational video 🙂

    Reply
  • August 7, 2022 at 10:58 am
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    Can you make a video about how to control regular 5-12V old relays with both Arduino, ESP8266 and ESP32 and transistor thanks.

    Reply
  • August 7, 2022 at 5:03 pm
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