Found in a 1968 Ferranti documentation, this circuit can be implemented with modern equivalent semiconductors. With the indicated components the load can be a lamp up to 1 A.
TTL square signals can be divided by 10 using this circuit. The maximum frequency depends on the...
This circuit indicates when the voltage of a 12 V battery is low. With changes, for example, the...
This is a basic inverter circuit for a 70 kHz crystal. We found it in an old documentation using an...