This circuit is from a 1965 Electronic Design. The transistors may be general purpose and the power supply must be symmetrical.
This integrating circuit multiplies the time that can be obtained with a 555 timer. We find it in...
This circuit was found in a 1967 Ferranti documentation. It takes the transistor to the conduction...
This circuit for receiving or transmitting low power was found in old American documentation. It is...