This Power supply sources from 500 to 1,000 mA according the transformar and was found in a publication of the year 1958. The diodes can be now the 1N4004 and the transistor should be mounted on a heatsink.
The Variable Frequency Oscillator (VFO) shown in the figure can generate signals in a frequency range...
The 8038 is an integrated waveform generator (sinusoidal, triangular and rectangular) from...
This circuit was found in a 90s Popular Electronics. The integrated circuit used is uncommon...