This circuit was obtained in a 1964 Electronic Design. The components used are from that time. Observe the high voltage used in the supply.
This inverter bistable buffer circuit was obtained in a Hands On of the 90's. Next to the circuit we...
We find this circuit in a Popular Electronics of the 80's. The frequency range depends on C1 and...
Suggested by a Popular Electronics from the 90s, this circuit triggers an external load, relay or...