Control everything with a DAC, and you have a programmable load controlled by an Arduino. With such a small form factor, getting rid of all that heat was bound to be a problem.

This is a simple arduino project for a soil moisture sensor that will light up a LED at a certain moisture level. It uses Arduino Duemilanove microcontroller board. Two wires placed in the soil pot ...

The security flaws on this common hotel keycard lock are nothing short of face-palmingly stupid. Look closely at the picture above. This is a hotel room door swinging open. The device he holds in h… ...

The easiest way to measure a resistive sensor is to connect one end to power and the other to a pull-down resistor to ground. Then the point between the fixed pull down resistor and the variable FSR ...

Servo motors and are constructed out of basic DC motors, by adding: • gear reduction • a position sensor for the motor shaft • an electronic circuit that controls the motor's operation Typically, a ...

This paper presents a novel Programmable Optically Variable Resistor (POVR) that provides a wide, continuously adjustable resistance range using an LED-LDR (Light Emitting Diode-Light Dependent ...