This circuit operates at a voltage of 1.3 V from a single mercury cell. We found in an old documentation and for the components used the frequency is 500 kHz.
This 7400 TTL circuit has a memory, keeping the LED on when a pulse is detected. The circuit must be...
The frequency produced by this oscillator depends on the temperatire sensed by a thermistor. The...
We find this power oscillator circuit in a 90's Popular Electronics. The circuit can be powered by...