Common collector stage (CB22226E)

This circuit employs an old germanium transistor. The circuit is from a 1950s publication and uses RC coupling.

1 to 10 Hz time base (CB7537E)
Found in a magazine from the '90s, this circuit uses an integrated circuit from the era that is...
Logic Level Indicator (CB1300E)
This circuit, found in documentation from the 1990s, uses a common 7-segment LED display. The...
Crystal Time Base (CB19368E)
This circuit provides precise signals of three frequencies, using CMOS technology. The integrated...