disposable camera, strobo circuit strobe

Strobe from Flash.

After using a disposable camera, you can build a strobe light (flashing light) with one simple modification. (6/2/2006)
Category: electronics circuits light diy homemade - Updated: 2009/07/24
Pinout information for the tachometer.

Tachometer/RPM.

Easy to build using only a few components. With some modifications, it can be used in an automobile. This Tachometer uses a PIC 16F628.(06/12/2004)
Category: microcontroller circuits automobile homemade - Updated: 2009/07/24
Pinout information for the tachometer.

Tachometer/RPM II.

This is an improved version of the Tachometer created specially to measure up to 9,999 RPM. Uses a PIC 16F628. (04/24/2006)
Category: microcontroller circuits automobile homemade - Updated: 2014/03/02
motorcycle.jpg

Tachometer for Bikes (circuit).

Here are some instructions how to connect the Tachometer version II to a single cylinder. Thanks Firoz! (3/9/2007)
Category: microcontroller circuits automobile homemade - Updated: 2009/07/23
transformerless_power_supply.gif

Transformerless Power Supply.

Simple, low cost and easy to build power supply. Ideal for applications that doesn't requiere too much power. (5/28/2006)
Category: electronics circuits homemade - Updated: 2009/07/23
usb led light schematic

USB LED Light.

A simply and easy-to-make circuit, useful when working with the computer at night. (6/8/2006)
Category: homemade diy computer light - Updated: 2009/07/23
One leg.

A "Walking" Robot

Previous robots are more like a "toy Car", this one walks. (02/07/2006)
Category: lego robots homemade - Updated: 2009/07/23
Walking robot using LEGOs.

Walking Robot III.

Powered by a solar cell, this walking robot can walk using four legs. NO RCX or sensors used, Just gears, one motor and solar power. (11/29/2007)
Category: lego robots homemade science diy - Updated: 2009/07/23
Walking robot using LEGOs.

Walking Robot IV.

An improved version of my "solar-powered four-legged all-terrain walking robot" can walk using four legs. Fasters and better movements. No RCX, no NTX or sensors used, Just gears, one motor and solar power. (11/30/2007)
Category: lego robots homemade diy - Updated: 2009/07/24
Lego Mindstorms Quad Walker

Walking Robot V

A quad-walking "robot" with poor performance. Using only four legs, this walking robot slowly moves like an arthritic dog. (11/14/2008)
Category: lego robots homemade - Updated: 2009/07/23

Where to get parts.

Tips to get cheap parts and some parts distribuitors than sell good and inexpensive parts. (6/10/2006)
Category: electronics circuits homemade - Updated: 2009/07/23
Testing Wood gasification.

Wood Gas or Biogas experiment

First test about making home-made gas from wood or biomass. A process called "Wood gasification" or "Biomass gasification". (11/03/2008)
Category: science projects homemade howto - Updated: 2009/07/23

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