I recently built a new PC and noticed after I was done that the
hard disk light was almost impossible to see. I tried different
LED's that were more efficient and even thought about modifying the
motherboard. But, I decided to avoid...
LED Lamp Dimmer
This circuit provides 32 steps of brightness control from 0 to 100% for a backlight or instrument panel using just two general purpose microprocessor signals. In addition, very little board space is required si...
Universal Programmable Remote
a National Semiconductor COPS8 Design Winner by Eric
Enter the Project Commander! This universal remote works with
virtually any IR remote. It "learns" by sampling an IR signal
coming from any remote by using...
iPod Super Dock Project
Here is a multi part project from endgadget that shows you how to make
a versatile docking station for your iPod. It's a multi part
project that takes you through the whole process so be ready!
iPod Super Dock Project Pa...
LED Turn Signals
Seen those cars with fancy turn signals on their side view
mirrors? Would you like to add something like that without buying a
new car? Well, this circuit takes that idea a step further by
generating a sequence of moving chevrons...
You’ve just spent a large sum of money for that new stereo and it’s time to fine tune your listening environment with the graphic equalizer. But wait. How can you do that objectivel...
Use this circuit to implement those knobs you see on
oscilloscopes, radios and other devices. Turning the knob clockwise
generates a series of low-going pulses from the COUNT-UP output
while turning counter-clockwise generates a ser...
45 Watt Single Chip Amplifier
This circuit is based on the National Semiconductor LM3876. This
device is capable of delivering as much as 56W of continuous
average power into an eight ohm load with 0.1% THD from 20Hz to
20Khz. Be sure to provide ...
FAST, High Energy Pulser
This circuit is designed to provide very fast, high current
pulses into laser diodes and LEDs. It can be modified to drive
ultrasonic transducers as well. The light pulses from the laser are
typically used for range-finde...
Trainwreck Express Guitar Amplifier
Because of their sound, Trainwreck amplifiers (http://www.trainwreck.com) have an almost occult like
following among guitarists. And, because they are produced in such
small volumes, they are almost impossible ...