|
|
|
|
|
|
|
 |
DiscoverCircuits.com, has
26,000+ electronic circuits or schematics
carefully
cross-referenced into 500+ categories. As a
vital resource for engineers,
hobbyists, inventors &
consultants, the site's collection of information
will
help you find quick solutions to electronic design
problems. |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Battery Chargers Alarms Circuits
Designed by David A. Johnson, P.E.
Last Updated on:
Monday, April 21, 2008 04:19 AM
Master Category List - Dave's Circuits
|
|
|
|
|
|
|
- Check Engine Beeper
When wired into a car’s indicator light panel, this circuit will turn on a loud beeper when the “check engine” light turns on. (added 7/06)
|
- Fake Car Alarm Light
Whenever the car’s ignition is turned off, this circuit activates a flashing LED, which can be positioned to appear as an
active alarm system. (added 7/06)
|
- Voltage Indicator
When troubleshooting the 12v electrical system of an automobile, it is nice to have a simple voltage indicator tool instead of a voltmeter. This electronic circuit, hobby circuit is
powered by two AA or even two N cells, which will provide enough energy for years of service. The circuit has only two leads...
|
|
|
More Battery Chargers Circuits
Master Category List - Dave's Circuits
|
