mono stabile (one shot) generator with 2 transistors (experimental circuit)

Finding out a 0.5 Watt Class A audio amplifier, how does that work? Experiment, schem. & explanation

TPA3116 Chip tested: 2x50 W audio, USB and Card audio in, LS out, line out, bluetoo & remote control

Two too simple 150 mW class A audio amps with 2 transistors, usable on 3 Volt at 125 mA constant

Charge a NiCad pack of 4 cells to 5 Volt. Basic circuit for AC/DC & about the basics of charging

Precision potentiometer (precise to 1 Millivolt). Schematic with 3 of them used, to do that job

TDA 2615 audio Chip amp 2 x 6 Watt max. from Philips, pure Hi Fi, datasheet & links how to make it

Field Effect Transistor tester for small signal FETS and MOSFETS, via the oscillation principle

The MC 34063 A tested as STEP UP converter DC to DC schematic and demo (low to higher DC voltage)

The MC 34063A (DC to DC up/down) Buck Converter Chip from Texas Instruments tested (schem/demo)

The Astabile Multivibrator can always fool you (happy flickering Christmas lights) schem/demo

Experimental oscillator with the NE 5532 p Chip (300 Hz-9KC) & a square wave to sine wave LF filter

Beginners 1 transistor audio or HF amplifier. The grounded emitter schematic, 2 times showed