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Capacitor Discharge Ignition Circuit - The CDI ignition circuit
produces a spark from an ignition coil by discharging a capacitor across the
primary of the coil. A 2uF capacitor is charged to about 340 volts and the
discharge is controlled by an SCR. A Schmitt trigger oscillator (74C14) and
MOSFET (IRF510) are used to drive the low voltage side of a small (120/12
volt) power transformer and a voltage doubler arrangement is used on the
high voltage side to increase the capacitor voltage to about 340 volts. A
similar Schmitt trigger oscillator is used to trigger the SCR about 4 times
per second....(circuit / schematic added 2/03)
Car Accelleration Meter - The circuit is drawn for measurement of
acceleration from -1000 mg until +1000 mg. It can be placed in kantra'n the
car and be supplied from the sheath of electric lighter. The circuit
includes one indicative LED and a screen LCD....
Car Alarm - (application / block diagram added 6/07)
Car Alarm and Immobilizer - This circuit features automatic exit
and entry delays - an optional instant alarm zone - an optional intermittent
siren output - and an automatic reset. By adding external relays you can
immobilize the vehicle and flash the lights…. [Design by Ron J.]
Car Alarm Sound Booster - For car alarms, emphasis should be put on hearing
the audible alert and identifying it as belonging to your ‘wheels’. Unfortunately,
modern car alarm systems seem to have the more or less the same alarm sound —
especially if they are from the same brand. Also….must register on this site....
[Published in Elecktor July/August 2010]
Car anti theft wireless alarm - This FM radio-controlled antift alarm can be
used with any vehicle having 6to 12-volt DC supply system. The mini VHF, FM
transmitter is fitted in vehicle at night when it is parked in car porch
or car park. The receiver unit with CXA1019, a single IC-based FM radio module, which
is freely available in market at reasonable rate, is kept inside. Receiver
is.... [Radioland.nt.au]
Car Back-up Alarm - The brake lights of automobile trigger this
circuit on and off. This save annoyance of alarm when it is not needed.
This is an older circuit which was published in Popular Electronics Magazine, but
still a good circuit today. (Tony van Roon's electronic design added 2/06) [Tony van
Roon's circuit]
Car Battery Charger - quickly and easily charge most any lead acid battery,
automatically turns charging off when ready…. [Design by Aaron Cake]
Car Battery Charger - An SCR Design with a 10 Amp rating. ….(design
added 12/08)
Car Ignition Coil Driver From 12 Volts DC - A Simple Circuit to run a Car
Ignition Coil to Obtain High Voltage. Or a 12 volt to 110 or 220 volt
transformer for low power applications....(Circuit design added 12/08)
Car Loop Detector - Another SimpleBut Very Effective Circuit. Bury the
coil in your driveway and it will detect any vehicle there....(electronic schematic
added 12/08)
Car Network Device - Our present car controller runs on a single PIC16F870
micro and provides functions for remote door locks, headlight reminder, and car
finder. It is constructed using wire-wrap to allow for future expansion and is
mounted using Velcro on the passenger side of the center console.…. [Luhan Monat -
Mesa Arizona]
