We found this battery eliminator in a Radio Electronics magazine from August 1974. The transistor must be equipped with a heatsink and other voltages can be achieved by replacing the zener.
This circuit, which is also a leak meter, has a detection resistance of billions of ohms. We found...
With the precision given by the crystal this circuit provides signals of several frequencies for the...
January 2017 - New ROHM TFZV series of zener diodes is now available from Mouser Electronics. The...