Hi folks,
I just made a combo fail. One is, I assumed that in complimentary bjts (like 2n3904 and 2n3906) the smaller part number means NPN. Turned out not to be the case in case of 2SD882 (npn) and KSB772 (pnp).
The second is, I installed transistors backwards. That's because I got pinout from my new transistor tester the wrong way. Turned out contacts on the ZIF socket numbered not the way I expected.
What's your recent fail?
PS transistors and my expensive opamp which I have in single quantity (lt1468) survived the abuse thanks to limiting current when I power the circuit. The opamp tried to sink current from the output, got hot, I noticed that and fixed the circuit.