This circuit was found in the September 1989 issue of Radio Electronics magazine. The circuit uses components that support modern equivalents such as the operational amplifier.
Figure bellow shows how the flip-flops of a 4027 can be connected to perform a divide-by-5 counter [odd...
This circuit is interleaved with the source of a portable AM or FM radio previously tuned to a...
This control allows to start or stop a motor up to 3 or 4 A with a low intensity signal. The...