Windshield Wiper Delay - The intermittent
wiper circuit shown above causes the auto's windshield wipers to wipe once every several seconds instead of constantly
wiping. The circuit may be added to older cars to provide the intermittent function or it may be used to replace broken wiper
circuits in modern cars. The delay. . . [Copyright © 1998 Wenzel Associates, Inc.]
Wiper
Control - STMicroelectronics-Application. . .
Wiper Speed Control - . . .
Wiper Speed Control - A continuously
working wiper in a car may prove to be a nuisance, especially when it is not raining heavily. By using the circuit described
here one can vary sweeping rate of the wiper from once a second to once in ten seconds.
Wireless Auto Tachometer - Anyone
performing their own automobile tune-ups knows how important it is to know your engines speed. With this tachometer, you can
measure your engines speed without any connections or annoying timing lights. . . . [Circuit designed by Aaron Cake]
Wireless Auto Tachometer - Anyone
performing their own automobile tune-ups knows how important it is to know your engines speed. With this tachometer, you can
measure your engines speed without any connections or annoying timing lights. . . . [Design by Aaron Cake]
Wireless bicycle
brake light - 04/17/14 EDN Design Idea The TI LDC1000 senses bike
wheel rotation and controls a stop light. My submission video shows the new Texas Instrument's LDC1000 attached to the rear
wheel fork of a bicycle, where it senses the spokes as the wheel rotates. This proof-of-concept demonstration shows how
perfect this sensor is for my goal of an improved bicycle brake light that has many advantages. I'm passionate about getting
this invention completed and on the market as soon as possible, where it can help prevent some of the many injuries and
deaths to the hundreds of millions of the world's bicyclists each year. . . . [by John Craig]
Wireless RFID
Smart Key Detector - Many cars now use a key with an imbedded RFID
microchip. The microchip is read when the key is inserted into the car’s ignition. The keys containing a microchip often
look the same as most other keys. People duplicating car keys will often not know of the microchip. This circuit will light
a LED if it detects a key containing a 125KHz RFID chip. . . . [Hobby Circuit designed by Dave Johnson P.E., 07/09/06]
WWV Converter for the Car - This
converter allows an ordinary AM car radio to receive WWV at 10 MHz. WWV transmits the precise time of day and the car is the
most common place to need accurate time! Other interesting stations near 10 MHz may also be received including those famous
BBC news and science shows. The unit should be constructed in a metal box with antenna connectors compatible with the car
radio. . . . [Copyright © 1998 Wenzel Associates, Inc.] |