High-speed buffer (CB9556E)

Found in a 1980s documentation, this circuit makes use of components from that time. Modern equivalents can be tried out.

Voltage Tripler (CB25544E)
This circuit multiplies the input voltage by 3 and can work with up to 12 V input. The current is a few...
Astable Timer 555 (CB20682E)
This circuit was obtained in a Hands-On Electronics from the 90's. The circuit turns on one LED at...
CW Modulation Monitor (CB20766E)
This telegraph monitor was found in an American documentation for radio amateurs from the 1970s. The...