Full-featured Dual H-bridge - i had always assumed that dynamic braking would be most effective at higher speeds. However, actual tests using a Faulhaber (micro mo) gearmotor showed that the brake would hold a motor almost stationary. These gearmotors are so well made that I can turn the 4 mm diameter shaft with light finger pressure. For the tests I had mounted a 90 mm diameter wheel, which gave me tremendous mechanical advantage. I found with the wheel mounted that I could barely turn the motor against the brake. __ Designed by Bruce Robinson
Full-featured H-bridge - This is a slightly revised version of the 6-transistor H-bridge designed by Mark Tilden and found on the BEAM Tek website (now only available via archive). I encourage anyone interested in H-bridges to read Mark's article, as it gives an excellent step-by-step explanation of how the bridge works. in particular, it discusses variations on the bridge, such as the positive-input and negative-input versions. The basic circuit is as Mark describes it. The changes are as follows. __ Designed by Bruce Robinson
GBSE - Type 1 (Voltage Controlled) Solar Engine - The "Gate Boost Solar Engine" is a new (6/2002) Wilf Rigter 1381-based design. This uses an internal voltage doubler to turn on a FET more efficiently. __ Designed by Wilf Rigter
Gesture-Controlled Robot - Life can be wonderful if everything around us can be controlled by simple gestures. Gesture recognition technology helps us to interact with machines naturally without any additional device. Gestures are interpreted...__ Electronics Projects for You
Good IR Detector - How to build a simple iR detector, schematics and alternate links __ Designed by DC Reagan
Hack of Talking Fish using a PIC16F819 microcontroller - These items were sold nationally several years ago. The fish would sing, open its mouth, turn its head, and flap its tail. After removing the back panel, all of the existing electronics were removed leaving only the 3 servo motors, speaker and photocell) __ Designed by Luhan Monat - Mesa Arizona
Hack-Toy Car - This car measures just 5 1/2 inches in length. it was sold as a remote control car for $19.95 at Fry's Electronics here in Phoenix. Powered by 4 AAA batteries, it has a small dc motor and a very interesting steering mechanism. (08/08/08) __ Designed by Luhan Monat - Mesa Arizona
Happy Birthday Singer solar engine - Time-Controlled Solar Engine: The original Type 2 Solar Engine was based around the "Happy Birthday Singer" (HBS) chip that was pulled from the original Hallmark singing greeting cards. __ Designed by Wilf Rigter
H-Bridge Motor Driver - Physical motion of some form helps differentiate a robot from a computer. it would be nice if a motor could be attached directly to a chip that controlled the movement. But, most chips can't pass enough current or voltage to spin a motor. Also, motors tend to be electrically noisy (spikes) and can slam power back __ Contact David Cook
Here are 10 Robots You Can Make Yourself - 10-Apr-15 -Design News: Chris Wiltz - From simple mods to more complex builds, here's a list and instructions for some of our favorite DiY robot projects. __ Gadget Freak
Hexapod - i got bored with Newt and made a hexapod (Whew! Was that expensive!). Pictures and some discussion. The hexapod is now defunct. __ Designed by DC Reagan
Hexbot Robot - The HEXBOT is constructed from 12 (cheap) model airplane servos. Each leg moves laterally on one servo and vertically on the other. Conveniently, this type of servo runs on 5 volts. These servos need only a specific width pulse to position it. Once it arrives at its target location, it draws very little power (about 10 ma). Power is provided) __ Designed by Luhan Monat - Mesa Arizona
Illustrated Guide & Rules for AM erican Robot Sumo - Robot Sumo is a simple, but fun, pushing contest. This guide is a complete description and walkthrough of a Sumo robot contest. it includes a variety of regulations, as well as tips and suggestions. __ Contact David Cook
Infrared Transmitter Project - The heart of this project is a NAND gate turned into a 40-kHz oscillator. A simple 9-volt to 5-volt regul __ Contact David Cook
Interplanetary Voice & never be caught out, out of your galaxy again! - impersonate a Robot, a Droid or one of the many known interplanetary aliens such as Daleks, Cybermen, Klingons, Cylons or even Darth Vader build this__ SiliconChip
IR Detector for Robot - How to build a simple iR detector, schematics and alternate links __ Designed by DC Reagan
Jet, the ultra-fast line-following robot - Learn the technical extravagance that competition leads to, as a line-following robot breaks the 100 cm/s barrier. includes plenty of techno-babble and names of people you don't know. __ Contact David Cook |