All posts on April, 2008
This is a simple Blue LED driver Circuit.It consists of the blue LED, a 1K ohm resistor, and a 9-V battery clip. LEDs have one lead longer than the other. This long lead must be connected to the (+) terminal of the 9-V battery using the clip leads.One lead of the clip should have the 1K ohm resistor soldered to it and the opposite end of the resistor soldered to the LED.[more]
This document explains how to interface a variety of devices to the Red Dot Cricket including:A DC motor. Resistive sensors, such as a photocell-based light sensor or a pushbutton switch. An infrared reflectance sensor. First, proper connector wiring technique, applicable to all devices is explained. Then individual wiring diagrams for each of the devices are presented. Finally, supplier information is given[more]
This project requires a basic IC operates as a linear voltmeter with a 1.2v range. The LM3914N to be used for this project.It is a chip specially designed to drive a bargraph display,using 10 leds as the scale. This project needs is to get full power showing all 10 leds lit, with just the bottom led lit when the fan controller is turned right down to around 6v.[more]
This robot is a direct creation from Cornell University’s ECE 476 Microcontroller course. Using a microcontroller it actively seeks out the source of a sound and moves towards it…audio source tracking!.The PeanutBot robot consists of three microphone circuits, three servo motors, an MCU and a PC. The concept chart of the system and communication protocols is shown in the website.[more]
The Acceleration Sensing Glove (virtual keyboard) was designed to demonstrate that accelerometers can be used to decipher and translate hand gestures into computer interepreted symbols. The glove and software were designed by Seth Hollar, John Perng, and Brian Fisher in Professor Kris Pister’s lab at the Univeristy of California, Berkeley.[more]
