Circuit Lake

If you want to learn Reverse Engineering you can use photoshop as aid tools. For example, This 12-keys keypad failed after years of daily use. No schematic or replacement parts from the original manufacturer. The only option was to replace it with an off-the-shelf telephone-style keyboard.Following the maze of each and every PCB track in a circuit is boring and error-prone, so here is the easier way to get the job done. Read the rest of this entry →

This is a simple and low cost desktop headphone amplifier for the office. The amplifier concept is simple and follows a typical single-ended class A circuit utilizing an active constant current source (CCS) in place of a passive resistor. A CCS doubles the efficiency of the circuit over that where a passive load resistor is used, bringing it to a maximum of 25%. Read the rest of this entry →

EEG is an instrument that measures electrical potentials on the scalp and generates a record of the electrical activity of the brain. Also called encephalograph.

The OpenEEG project have developed a low cost EEG machine that can be built by any person possessing basic skills in electronics assembly. Many people are interested in what is called neurofeedback or EEG biofeedback training, a generic mental training method which makes the trainee consciously aware of the general activity in the brain. This method shows great potential for improving many mental capabilities and exploring consciousness. Other people want to do experiments with brain-computer interfaces or just want to have a look at their brain at work. Read the rest of this entry →

This is cool robot project by Nicola. He build Self-Balancing Robot which can stand without fall. He use Arduino Diecimila as main processor. For the sensord the robot project use Sparkfun IMU Combo Board - 2 DOF - ADXL203/ADXRS401.

This is a combo Gyro/2-axis-acelerometer. Of the many combinations avaiable, i’ve choosen the one with smaller range but better precision, as i think it’s more important in fine balancing. I’d like to have something that is stable and not swinging back and forth. Read the rest of this entry →