We found this circuit in the November 1984 Radio Electronics magazine. The base frequency is given by C1. The power supply can be between 3 and 12 V.
This digital indicator circuit was found in the June 1988 issue of Radio Electronics magazine. The circuit...
This powerful amplifier with 2N3055 transistors at the output provides a few tens of watts rms on a...
This simple logic level tester was found in Radio Electronics from the 90s. The inverters are of...