Me and Markus have been debugging our projects couple of days. As always in electrical engineering - you fail all the time. So I thought to write down today's failures and couple of old ones related to today's ones.
- Tantalum capacitor blows up because they mark it the other way than electrolytics
- Potentiometer is routed in the wrong way - output is logarithmic where it should be linear
- Potentiometers next to each other work opposite ways
- Pinheaders are so close that you can't plug into both of them at the same time
- You accidentally deleted the file and forgot to backup... again
- There is no pullup on reset
- HWB leg on atmega8u2 is pulled high, not low
- SCK from programmer is routed one pin left
- Two row connector is soldered on wrong side of the board
- Forgot to solder ferrite beads - no power on your chip
- Cold joint on your chip - pressure from test lead makes contact, so you don't detect it with measuring
- Regulator in unstable because you haven't soldered most of the circuit in place
Posted on 2012-08-29, 08:58 By jaanus
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