This 3 A adjustable source uses the LM350 integrated circuit, which must have a good heat radiator. The circuit is from 80s documentation and has been explored in other versions on this site.
This circuit is intended for calls to the deaf and is indicated in an old English documentation. LEDs can be...
Suggested by Mullard in a1969 documentation, this circuit generates the erasure signal for tape...
The main feature of this RF oscillator that operates in the range of 100 to 800 kHz is its low...