Unregulated power supply (CB22341E)

This full wave source uses germanium diodes, and its current is a few milliamps. We found it in an American documentation from the 60s.

Divide-by-8 TTL (CB238E)
This circuit uses the 7493 to divide a TTL square signal by 8. The circuit must be powered from a...
Ramp generator with integrator (CB21845E)
This circuit uses a feedback integrator. We found it in Ferranti's transistor manual from 1974....
Current shield RS232 (CB8075E)
Found in a Popular Electronics from the 9s, this circuit has output for RS-232 interfaces and current...