This circuit was found in an American magazine 73 for radio amateurs of the 80s. It is an automatic transmission circuit for telegraphy. The circuit is TTL.
This circuit was obtained from a 1967 General Electric manual. The circuit makes use of absolutely...
When the vehicle door is closed, this circuit keeps the internal lights on for a time depending on C1....
This Power supply is intended to Power small loads with currents up to 30 mA. The voltage depends...