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A Theremin Design Walkthrough

Posted April 27, 2018 by Chris

"This document will detail my attempt at designing and building a complete theremin…..The project should be a valuable educational experience for anyone undertaking basic RF electronics."

Electrostatic/Smoke Precipitator – A Simple One

Posted March 2, 2018 by Chris

"A smoke precipitator, or an electrostatic precipitator, is a device which removes smoke or other particles from the air using high voltage electrostatics."

Make your own Nixie Tube socket

Posted February 18, 2018 by Chris

"In this mini tutorial we introduce a quick and cheap way to make your own Nixie Tube sockets to use them on your next Nixie project. A socket enables you to change a damaged Nixie Tube quickly and with minimum effort."

2×4 H-Bridge

Posted February 1, 2018 by Chris

"This motor-driver is an H-bridge circuit that was designed to drive a single DC motor at up to 30amps at 24vdc. It incorporates a simple design utilizing parallel mosfets to allow a higher amperage rating and requires 4 wires to control each bridge, 2 digital and 2 PWM capable."

Real vs. Fake Audiophile Op-Amps: OPA627

Posted January 29, 2018 by Chris

"Walking around ebay I noticed insanely cheap OPA627’s. It’s rather old, popular and high-quality opamps, often used in audiophile gear. Manufacturer (Texas Instruments / Burr Brown) sells them 16-80$ each while on ebay it’s cost was 2.7$, shipping included. Obviously, something fishy was going on. I ordered one, and for comparison – older one in metal can package, apparently desoldered from some equipment. Let’s see if there is any difference."

Building a Custom Integrated Circuit Package

Posted January 26, 2018 by Chris

"The aim of this pictorial guide is to build a complementary IC package to the Vishay IR receiver. It incorporates the same pitch and pin out except for the ‘Output(1)’ which will now become the new input."

How to Build the CMoy Pocket Amplifier

Posted August 19, 2017 by Chris

"I think that the CMoy pocket amplifier is an ideal project to get started in audio DIY. This article is written for the beginner DIYer, though if you just want a guide to building this particular amp, you can skip to the parts or assembly sections.quot;

DIY Mini Tesla Coil

Posted July 23, 2017 by Chris

"How to make a mini Tesla coil ! In today’s video I’ll show you a great idea, a long awaited video about how to make a Tesla coil at the minimal expenses. It’s very easily to make a Tesla coil at home."

Induction Introduction

Posted April 24, 2017 by Chris

"The induction receiver shown below is very sensitive and can serve a variety of purposes. It is excellent for tracing wiring behind walls, receiving audio from an induction transmitter, hearing lightning and other electric discharges, and monitoring a telephone or other device that produces an audio magnetic field."

PSU Burner

Posted March 10, 2017 by Chris

"What does one do when designing a power supply? Well, build a power supply tester, of course. One of the simplest things to build is a constant current load. This will allow for testing of the endurance of the power supply, as most of the designs out there are using slow components."