This circuit uses a feedback integrator. We found it in Ferranti's transistor manual from 1974. Transistors are general-purpose types at the time.
This circuit can be implemented with common components operating with low-intensity signals. The...
This timer has a divider programmed by BCD switches. The circuit is from a Radio Electronics...
This circuit is old, causing LEDs to be lit sequentially. Several types of games can be programmed using...