Sawtooth generator (CB21338E)

This op amp circuit is based on a 555 IC and two common op amps. Transistors are general purpose.

1 MHz Pierce Oscillator (CB8050E)
The frequency of this Pierce oscillator, found in 1969 documentation, depends on the crystal. The...
0 to 20 second timer (CB20370E)
This simple timer with unijunction transistor was found in an old American technical...
Power supply with voltage quadrupler (CB22343E)
Found in documentation from the 1960s, this power supply employs germanium diodes from the time....