This circuit is one of many of its kind that can be found on this site. This one is from a September 1987 Radio Electronics. The triac must be controlled according to the load.
This circuit was originally found in a Philips documentation from 1969. It is intended for sensing...
This 6-transistor transistor radio is a RCA product from the 1960s. The circuit is powered by a 9...
We found this circuit in documentation from the 90s. Instead of a voltmeter, you can use the...