I was attempting something that I don't even know is possible. Trying to use a 74hct4020(ripple counter) to count up the output from a 556, then use a 10bar led to display the number of pulses. I saw smoke from the 556 , don't know if the other one is blown or not. I guess I have two questions. Could someone point me to a circuit that can test the 4020. I already tested the 556, it's blown. Also, is it even possible to do what I tried to do? I guess I'm trying to do to much to fast....
Bentov
Bentov