Transistor tester comparison, test and box assembly

Comparing two component tester kits based on ATmega328P and showing how they identify and test various components. For fun, I also assemble the box that comes with one of them. The tester with a color display draws 30mA and the monochrome one draws 13mA in use. Both draw less than 0.1uA in standby.

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[perhansson]

At 11:04 it shows that the tester is not calibrated, calibration is done by shorting the three test pins together with a low ohms short, like three pin jumpers soldered together, depending on the firmware version it may then require a stable capacitor for calibration between 100nF to 1µF, preferably something like a film capacitor is used. If SamplingADC was enabled in the firmware it will also require a small capacitor around 10 to 30nF to later be used together with small inductors that could otherwise not be measured, but this can be ignored if that feature is not needed or if it was not compiled in.

[flos]

3:47 you can update the firmware to have the menu and the special functions. It will show more information too

[tomschmidt]

I bought one of these several years ago on eBay and amazed at its capability.

[td]

Excellent. Thank you. I had wondered about this exact comparison. The YouTuber called "The HWCave" has a good series on improving the yellow model tester. I made his modifications and the modifications did work well. There are both hardware and software changes. Highly recommended. Also, a set of wires can make it easier to use the Yellow Tester ZIF Socket... A 3-pin header to sit in the ZIF, with clips on the ends of the wires to connect to the DUT.

[antoninkulhanek]

The dimer display is because there are 2 serial rezistors of 250 Ohms in display power line. First is on the main board, second one is on the display module. By data sheet of display there should be one 250 Ohm from 5V . If you short rezistor on main board the brithness will be fine.

[jafinch]

Awesome! These amaze me and I have the simpler version. Didn't realize there are newer versions with more functionality. Nice! Thanks for sharing.

[JohnHiesey]

When you measure the mosfet at 12:05, the tester with the yellow board shows the symbol for the internal diode pointing in the wrong direction!

[user.A]

If I tried to glue something like that, it would have permanent fingerprints all over it.

[LawpickingLocksmith]

Nice! I had spent hours on ebay before buying the complicated one. Even there the perspex housing needed some mods. Keep it up, we all love such gadgets!

11:07
Maybe the transistors are tested on different frequencies. Darlington pairs are usually slow at higher frequencies.

[MissNorington]

I just received that new tester in the mail (after watching Diode's last video), got it, tested it, and found this video. What a coincidence! I didn't get the stupid enclosure though.

[vaclavtrpisovsky]

I have the yellow tester because it was the cheapest one. There are more bugs in the software, notably 2 diodes in antiparallel on pins 1 and 3 show as in antiseries (?!) but they are OK if between pins 1-2 or 2-3.

[michaelseitz]

Nice comparison 🙂
I can recommend the LCR-TC2 for ~17 USD (w/o VAT). It is more like the red one you have. But it actually makes use of its colour display, and it has a case with Li-po battery. Apparently, there are different versions and I got version 2. But some that are sold as version 2 actually are version 1 ...

[basileus]

I have the yellow one with the acrylic case and it fits perfectly, the display cable is very loose on your unit and flops way too forward. Also the case is supposed to come with a black 9V battery holder that sticks with a piece of double sided tape and matches the notches in the acrylic panel. No problems with the lever or button not fitting with mine, it's perfect

[piconano]

I love these so much, I have 3 different makes and models.
One can measure Zeners up to 20V.
I am waiting for a version that sings "Marry had a little lamb"!

[janplex]

Hned jsem poznal český přízvuk. Super video👍

[jutukka]

Yes, the same thing with the display connection. I left the upper part of the case totally open, no problemo.

[Elektronenregen]

I like these multitesters. My father has one with a built in Li-Ion battery.. quiet handy!
Thank you for the video :).

[HyperMAX]

That big display tester looks good. i will try to buy it somewhere.

[yomboprime]

About the display, perhaps you can change the LED resistance by a lower one to get more brightness. These models usually have the resistance externally.