This circuit with TTL compatible output was found in a 1968 US documentation. The circuit is powered by 5 V and the frequency can be changed by changing the crystal.
Older cars and some modern models do not have an audible direction indicator. This simple circuit can...
This is an integrated recommended for portable amplifiers, recorders, and battery powered radios. It...
We found this circuit recent English documentation. The circuit uses a common transformer and can...