µ[micro]electronics info

A weblog focused on interesting circuits, ideas, schematics and other information about microelectronics and microcontrollers.




Because I have not tested all electronic circuits mentioned on this pages, I cannot attest to their accuracy; therefore, I do not provide a warranty of any kind and cannot be held responsible in any manner.

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Component checker / tester

Everyone knows the problem: You have a transistor, but you can't read its signature. Or you can't find the datasheet... You have a diode, but... You have a capacitor, but you can't read... Here is a smarty solution.


* Automatic Detection of NPN and PNP transistors, N-and P-channel MOSFETs, diodes (including double diodes), thyristors, triacs and resistors.
* Automatic detection and reporting of the pins of the test component
* Detection and display of protection diodes for transistors and MOSFETs
* Determination of the amplification factor and the base-emitter forward voltage of transistors
* Measurement of the gate threshold voltage and gate capacitance of MOSFETs
* Show the values on a text-LCD (2x16)
* One-button operation, automatic shut-off
* Power consumption in off mode: <20 nA

This tester also supports diode measuring, R/C testing, and a lot of other components identifying.

Link: Transistor tester (EN translation)
Original: AVR-Transistortester (German)
Forum: Discussion about tester - check for the last firmware

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