Electronic Circuits and electronic circuits, electronic schematics plus an extensive resource for hobbyists, inventors and engineers

DiscoverCircuits.com, has 40,000+ electronic circuits, cross-referenced
into 500+ categories.    We have searched the web to help you find quick design ideas.
We make every effort to link to original material posted by the designer. 
Please let us if you would like us to link to or post your design.

HOME Schematics Index Hobby Corner Dave's Circuits Electronic Resources Contact Info
Imagineering Ezine    Discover Solar Energy Dave Johnson & Associates Faraday Touch Switches


Sensors / Detectors: Automotive Circuits
Sensors / Detectors -- Main Page
Automotive:  #'s       A-B       C-D       E-F       G-I        J-M       N-S      T-U      V-Z


Last Updated: November 29, 2017 05:39 AM
Circuits Designed by Dave Johnson, P.E. :
  • 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]


Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

Vehicle Anti-Hijack Alarm -  Like the first two Hijack Alarms - if a door is opened while the ignition is switched on - the circuit will trip. And after a few minutes delay - when the thief is at a safe distance - the Siren will sound. But this time the engine does not go on to fail automatically. Instead - it will continue to run until the thief turns off the ignition. Then the engine will not re-start. . . .  [Circuit Designed by Ron J.]

 

Vehicle Anti-Theft Alarm -  This car alarm circuit features Exit and Entry delays, an instant alarm zone, an intermittent siren output and automatic Reset. By adding external relays you can immobilize the vehicle and flash the lights. . . .  [Circuit design by Ron J.]

Vehicle Loop Detector -  Another Simple But Very Effective Circuit. . .  [G.L. Chemelec]

 

Volvo 164 electric fan thermostat -  . . . 

 

Wide Band Fuel Mixture Display -  This document is an introduction to the Wideband Fuel Mixture Display (FMD). . . . 

 

Wide Input Range 1a LED Driver Powers High Brightness LEDs with Automotive & 12 VAC Supplies -  DN1012 Design Notes (Linear Technology). . .  [Linear Technology]

 

Windscreen loop aerial -  If you do not like the whip antenna on your car, you may try this alternative circuit. A one-turn loop is installed in the windscreen of the car, keeping possibly away from the metal structure of the car. This loop is terminated in a 6. 5mm ring core suitable for VHF use. . . 

 

 

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.]


Automotive:  #'s       A-B       C-D       E-F       G-I        J-M       N-S      T-U      V-Z


HOME Schematics Index Hobby Corner Dave's Circuits Electronic Resources Contact Info
Imagineering Ezine    Discover Solar Energy Dave Johnson & Associates Faraday Touch Switches


 About Us   |  Advertise on DiscoverCircuits.com   |   Report Broken Links  |    Link to DiscoverCircuits.com  |    Privacy Policy

Copyright  January, 1998 - November, 2017     David A. Johnson & Associates.  All Rights reserved. 
 Linking is ALLOWED but COPYING any content or graphics to your web site is EXPRESSLY PROHIBITED.