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Automotive
12v Electrical System Voltage Indicator
This battery powered unit is designed to quickly aid troubleshooting of 12v
electrical systems in a car. Three LEDs proved a visual indication of a +12v,
ground or an open circuit voltage level.
Links to electronic circuits, electronic schematics, designs for engineers, hobbyists,
students & inventors:
A 555 -Timer Based Motorcycle Alarm - This circuit features an
intermittent siren output and automatic reset. It can be operated manually
using a key-switch or a hidden switch; but it can also be wired to set
itself automatically when you turn-off the ignition. By adding external
relays you can immobilize the bike, flash the lights etc. (Circuit
design added 08/08/08) [Circuit Designed by Ron J.]
A CMOS Based Motorcycle Alarm - This circuit features an
intermittent siren output and automatic reset. It can be operated manually
using a key-switch or a hidden switch; but it can also be wired to set
itself automatically when you turn-off the ignition.… [Design by Ron J.]
A CMOS Based Single Zone Alarm - This circuit features automatic
Exit and Entry delays, timed bell cut-off, and system reset. It has
provision for normally-open and normally-closed switches, and will suit all
of the usual input devices (Pressure Mats, Magnetic Reed contacts, Foil
Tape, PIRs and Inertia-Sensors, see.... [Design by Ron J.]
A Simple Car Battery Charger psimages - This very simple circuit
uses a transformer ,two diodes , a capacitor and an ammeter. To charge
a battery just connect + and terminals of circuit to
corresponding terminals of battery. When battery is not
charged, ammeter reading shows 1-3 amps....(added 10/05)
A Simple Transistor Based Motorcycle Alarm - This is an even simpler
transistor based motorcycle alarm. The circuit features a timed output and automatic
reset. It can be operated manually using a key-switch or a hidden switch. By adding an
external relay, it will set itself automatically, and/or immobilize the machine, every
time you turn-off the ignition. It's easily adapted for a 6-volt system, so it will
protect your "Classic Bike".... [Design by Ron J.]
A Transistor Based Motorcycle Alarm - This circuit features a timed output
and automatic reset. It can be operated manually using a key-switch or a hidden
switch. By adding an external relay, it will set itself automatically, and/or
immobilize the machine, every time you turn-off the ignition. It's easily adapted for
a 6-volt system, so it will protect your "Classic Bike".... [Circuit Designed by Ron
J.]
Acceleration meter for cars - This circuit it is count the acceleration from
-1000mg up to +1000mg. Can be used in lot of applications like cars, elevators, ramps
and more.….(electronic schematic added 03/09)
Additional stop Lamp control unit - In Japan, the car that is equipped with
additional stop lamp increased. This lamp expands the area that shines red at
the time of stepping the brake to stop the car and …....
AN10 Automotive Relay Drivers using the ZVN4206AV: Protection Free Interfacing with
Avalanche Rated MOSFETs - Zetec Semiconductors Applications Notes An
alternative solution is provided to usual large package Darlington effected
relay driver. The ZVN4206AV has been designed, processed and rated to withstand
significant energy within breakdown region. This allows part to
absorb back-emf and transient energy, reby allowing lower component count circuits.
(app note added 2/06)
