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Zen and the Art of Noise Reduction

This blog is not a technical manual on how to reduce noise from an audio signal or increase Signal to Noise ratio in the traditional sense.   It is sometimes about making “noise” and it’s definitely about creating interesting gadgets and experimentation with audio, electronics and research… 

Curious C-Beeper

Curious C-Beeper

As regular readers will know I am often inspired by YouTuber Alan Yates (vk2zay) experiments and, indeed, this is how I came across Charle's Wenzel's (techlib.com) Curious C-Beeper Circuit. The circuit is used for testing small value capacitors and matching them by...

Charge Collector

Charge Collector

Recently, during the disassembly an old Danavox Induction Loop tester I managed to salvage an analogue dB Meter (amongst other parts). Remembering the other two analogue VU meters (similar to those found in the Roland Space Echo) stored away in the lab, the decision...

Field Detector

Field Detector

Another one of Alan's contraptions (vk2zay). After building the audio version of the Electroscope, I became interested in what types of emissions are given off by lights and other electrical equipment and appliances. There's several circuits on this battery topper all...

Electroscopes

Electroscopes

Based on a few very common NPN/PNP 3904/3906 (or any small signal) transistors and a handful of resistors and a couple of LEDs these circuits provides around a 6 million gain to detect small electrostatic fields.

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