Radiofun232

Audio amplifier made for 5 Volt at max. 300 mW out: schematic, demo and more, say for an Arduino

Radiofun232 on YouTube. Updated monthly, always more info/updates in the comments section.

Making (hobby) circuit test boards in electronics with a very low stray inductance and - capacitance

Audio micr. amplifier for electret capsule with 3 transistors on 3 - 2.2 Volt demo & practice VLOG

How to make a good hum free electronic power supply (series regulator: long video & actual drawing)

Overview from my published books radiofun232 on the Lulu website

Carbon - Aluminum Battery, with NaCl (=kitchen salt) as an electrolytic fluid, demo/setup/results

Hearing aid for (elderly) people / electronic spy microphone on 4,2/4,5 Volt

Simple CLOCK circuit to drive dig. CMOS Chips via a MUVIB, works from 4 Hz - 10 KC demo & schematic

Radio oscillator (1 PNP transistor) for Long Wave and VLF schematic and demo 145 KC-167 KC

Ground loop hum (50 Hz or 60 Hz) in audio amplifiers: what is the cause and how to cure it?

Rough test of a discrete 2 x 30 Watt homebrew audio amplifier on thermal runaway + schematic

Very good Muvib square wave generator (1968) with constant current source, works from 1 Hz - 1.5 MC

Very simple superheterodyne SW radio (2-10 MHz), part 5 ( receiving results)

Good quality audio pre amp with volume/ bass/ high/loudness control (schematic)

Simple & easy but good techniques to build a problem free audio amplifier