This circuit was found in a 90s Silicon Chip documentation. The current of the transformer is 1 A maximum, a value given by the integrated circuits used.
This circuit was obtained in an English magazine from 1979, but it can be easily assembled with...
Here we show a simple way to use the 4088 or 4018 as a latched switch. The output can drive...
In fact, it is a RF field indicator with an operational amplifier equivalent to the 741. This...