This configuration was found in an American publication from the 90s. Operators admit equivalents just like transistors. The circuit does not require a symmetrical source.
This circuit, obtained from old documentation, allows the recovery of sulfated batteries. The...
This 80's circuit uses a small light bulb as an indicator, but an LED with the appropriate resistor...
This amplifier with the RCA CA3018 integrated circuit was found in the August 1970 issue of Radio...