traffic light

Traffic Light.

A two-way Traffic light using a PIC 12F629. As bonus, a traffic light that doesn't use a PIC is included. (05/13/2004)
Category: microcontroller circuits homemade automobile - Updated: 2009/07/24
A PMW using a 555 oscillator.

PWM using 555.

A simple oscilator with PWM that can be used to control speed of motors or light intensity. (4/29/2006)
Category: electronics circuits - Updated: 2009/07/23
resistor.gif

Resistors

How to read the color codes of the resistors and tips. (6/25/2006)
Category: electronics circuits howto - Updated: 2009/08/02
sa04-11ewa.gif

Displays: LED Matrix

Information for the Common Anode LED Matrix Display for SA04-11EWA, NFM-12882BEG-11, LEDM88RG (Updated 7/3/2006)
Category: electronics circuits - Updated: 2009/07/23
Security keypad using a 12F629

Security Keypad.

This Electronic Code Lock uses a 12-keys keypad is used to enter a password and open an electrick lock or any other device with a signal. Uses an 8-pin PIC 12F629. (11/17/2004)
Category: microcontroller circuits diy - Updated: 2009/07/23
security keypad key pad matrix keypad array safety keypad with LCD Hitachi Display.

Security Keypad II

An improved version that can be used on security vaults, Doors with electric latches, Alarms, Safety devices and many other uses. It uses an HITACHI LCD (16x1 or 8x1) and a matrix keypad. The HEX code is available for 16F84A and 16F628. (5/27/2006)
Category: microcontroller circuits diy - Updated: 2009/07/24
Sound Meter Schematic

Soundmeter

A simple soundmeter using the PIC 16F628 or 16F84 (5/20/2006)
Category: microcontroller circuits audio - Updated: 2009/07/24
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
tachometer.gif

Tachometer Circuit.

A simple tachometer circuit using one NPN transistor. (12/04/2007)
Category: electronics circuits automobile - Updated: 2009/07/23
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
Timebase generator datasheet.

Timebase generator.

One Minute/One Second Pulse generator. Ideal to be used to build any clock. Uses a 12F629. (05/31/2004)
Category: microcontroller circuits diy - Updated: 2009/07/23
traffic light circuit, two ways.

Traffic Light.

A two-way traffic light using a CMOS 4017 and 555. To be used as toy only. (4/23/2006)
Category: electronics circuits light - 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

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