These 6 to 12 V source with current up to 100 mA was found in Radio Electronics magazine from June 19666. The source has a current indicator and uses transistors of the time.
This circuit is from an English publication from 1978. It generates random binary numbers when we...
We found this circuit in a Poptronics of February 2000. We can do its assembly using 4 1N4001...
Found in American documentation from the 90s, this circuit uses a GASFET of the time. The circuit is...