This thermostat circuit triggered by a neon lamp and having a thermistor as a sensor was found in an old American documentation. SCR is according to load.
This lamp flasher configuration using an astable multivibrator is from a 1968 publication. The...
When the voltage in the circuit exceeds the value set in the trimpot, the LED goes off and, if a...
The maximum input voltage of this circuit is 20V and the output current is 250 mA. The circuit is from...