Moving hole with the 4017 (CB25433E)

This circuit is from a Radio Electronics magazine from February 1992. The circuit has the effect speed dependent on C1 and adjusted by R3.

| Clique na imagem para ampliar |

Filter analyzer (CB8227E)
Found in a 90s Popular Electronics, this circuit is interspersed between the filter and the...
Yes or non-inverting function with Relay (CB19765E)
This is the simplest function that triggers the load if the level of the input signal is 1. In...
LM381 52 dB Amplifier (CB25276E)
This non-inverting AC amplifier was found in the February 1990 issue of Radio Electronics...