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Hi my doughter (12years old) built the monochron clock, after watching the minimaker show on youtube.
Since we live in Sweden the included poweradapter did not work. I found another adapter in the part's bin rated at 9v. Connected and destroyed the TO-92 (got hot and stopped working)... Measuring poweradapter... to high voltage. Replaced the TO-92 (and poweradapter).
The clocks starts up. Display is working (playing pong).
The problem is that the buttons are not working.
Measured between gnd and button input on uC (with uC removed): No Push =1.9k Push S1 =0k Push S2 =0.85k Push S2 =1.48k
Is this correct?
Any ideas? Is it possible that the analog input on the uC is broken? Did i break it (shame on me :oops: )...
As long as they are all the same, the voltage divider should produce the right output. Since your assembly looks fine, let's try replacing the CPU. Contact email@example.com with a link to this thread and ask for a replacement Monochron CPU.
If resistors measure 880 not 1k, wouldn't this indicate parallel resistance from the Vcc line? Since regulator failed and was replaced, makes me wonder. How about voltage measurements at each of the resistors with switch not pushed?