This battery circuit provides a charging current of 500 mA depending on the solar panel. The switching circuit is from a National Semiconductor documentation from the 90s.
This circuit draws one of the three possible guesses of a sports lottery logo: column 1, 2 or the...
This Tesla coil was found in the November 1994 issue of Electronics Now magazine. T1 is a TV...
Hartley oscillator operates in the audio range. Frequency can be adjusted by P1 and also depends...