Found in the December 1974 issue of Radio Electronics, this circuit is similar to the previous one, only using another TTL counter. The circuit must be powered by 5 V.
We found this circuit in a 1973 publication. The circuit lets frequencies below 480 kHz pass...
This power supply was originally indicated for work with electroplating. The transformer is 2 A or...
This simple circuit serves to identify the terminals of a PNP transistor. For NPN transistors, just invert...