This biestable vox circuit was found in an old documentation. The circuit makes use of components of the time (80's) and can work as a shield since the power is 5 V.
This circuit shows how to use the TTL IC 7790 to divide a square TTL signal by 7. Duty cycle is...
This fish flame circuit was found in a 1971 magazine. The circuit can still be mounted with BC558...
Found in Linear Technology documentation from the 90s, this circuit uses an operational amplifier...