We found this circuit in a 1967 American documentation. It is a transmitter for animal research, monitoring intestinal pressure. The operating frequency is 22 kHz.
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...