6AC7 Amplifier (T450E)

Obtained in MIT documentation, this 4-stage circuit has high gain for small signals. The power supply sources 150 V.

Monostable 4013 (CB4604E)
This circuit uses one of two D-type flip-flops available on an integrated circuit 4013. The...
Tone Triggered Relay (CB5942E)
This circuit is from an 80's documentation. The transistor can be any general purpose PNP and the...
Shooting in the Dark (CB3843E)
In this circuit of 1987 the player has to briefly press one of the keys trying to hit which LED...