How to build a random message playback

This is a step-by-step guide on making a random message playback using USB5M

Skill Level: Intermediate

How To Make an Arduino Combination Door Lock

This artical will walk you through using an arduino to make your own combination door lock

How to Drop 9-15v down to 5v

This is a very basic artical that will help anyone drop 9-15v down to 5v regulated.

Make a motion activated message playback module.

Make a motion activated switch that could play a message when someone walks past.

How to build a SMD FM Transmitter

This is a step-by-step guide on making a SMD FM Transmitter

Skill Level: Intermediate

Servo Controllers

A detailed PDF on how to make a servo controller and how it operates

How to use LEDs

View this cool how to chart on using LEDs with circuits

How To Make a Joule Thief

This artical will cover how to make a Joule Thief and how it operates

Skill Level: Beginner

How To Make a PCB

This article will cover how to make a printed circuit board (PCB)

Skill Level: Beginner

Using the LM358 Op Amp

This article will cover the use of the LM358 Op Amp in a few example circuits

Skill Level: Intermediate

How To Make a Flip Flop BCD Counter

This articale will cover the use of an Asynchronous Flip Flop Counter that gives an output in BCD (Binary Coded Decimal)

Skill Level: Beginner

How to make a 7 Segment Display

This artical will cover the use of a 7 segment display in conjunction with a driver IC

Skill Level: Beginner

How To Make a Vibration Sensor

The circuit detexts sharp "knocks" or "high frequency" oscillations and converts the sensors minute voltage level into something more useful

Skill Level: Easy

How To Relays

Engineering notes on: LEDs series and parallel, Open collector outputs and How to Connect a load to a relay output