Determine if a BJT is NPN or PNP using a Saleng Uno

While there are almost an infinite number of simple applications, a transistor tester appears to be uncommon in Arduino related materials.┬áThis simple project demonstrates the Saleng Uno as a BJT transistor type tester. A standard 16×2 LCD module displays if the result is NPN or PNP, a momentary button tells the Saleng Uno when it should start processing and the three 10K resistors are used as test circuit.

Circuit:

Code:

Demo Video:

We’ve based this project from this article. We’ve added an LCD and a start button and added some validation before displaying results.

 

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