CAR BATTERY TESTER

Checking the status of your car battery (accumulator) should be easier with this circuit which measures the internal resistance of the battery. Pulses generated by the 555 are used to drive a dummy load and the AC voltage which develops across the battery gives an indication of its internal resistance: the lower the voltage the healthier the battery. The AC voltage is read out by means of a digital meter connected at the output.
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Car Alarm Systems May 20, 2011 … Posts Tagged ‘car alarm systems‘ … Posted in alarm home system, alarmsystems, Automotive, Electronic Control, Electronic products | …

Car Alarm Circuit Apr 4, 2011 … When car thieves are scoping out prospective targets, sometimes all it takes is the appearance of an alarm system to deter them… and its …

Burglar alarm systems 1 day ago … Car Burglar Alarm timer delay using NE556 Car Burglar Alarm timer alarm system circuit , model to economize. This circuit convenients for to …

Bulldog keyless entry system for cars The unit was easy to test and install and has a range of about 100 feet. For basic testing, temporarily connect the power and ground wires and listen to internal relay clicks …..

Car Boot Lamp Warning by ICM7556 On many cars, the boot light will not go out until the lid is properly closed. It is all too easy when unloading the car, to leave the lid ajar. If you are unlucky and the car remains unused for some time, ……

Speed Alarm For Cars In normal suburban driving you pass through so many different speed zones that it can be a nuisance having to switch speed settings. The speed display can also be a distraction. This circuit eliminates the display and the need for speed selection…….

Electronic car horn by NE556 An LM556 dual oscillator/timer, U1, configured as a two-tone oscillator drives U2, a dual 4-watt amplifier. One of the oscillators, pins 1 to 6, contained in U1 produces the upper frequency signal ……

Car Burglar Alarm system with radio wave signal When steal open automobile door relay K1 and K2 work make have voltage 12V give radio transmitter and origin sound part for mix radio waves steal will deaf anything sound. ….

Car Burglar Alarm timer delay using NE556 Car Burglar Alarm timer alarm system circuit , model to economize. This circuit convenients for to set up in an automobile. usually switch at set up keep with automobile door will the circuit closes. ….

Car Alarm Simulator by LM324 When car thieves are scoping out prospective targets, sometimes all it takes is the appearance of an alarm system to deter them… and its certainly a heck of a lot cheaper than the real thing! With this nifty kit you ……

Car Temperature Gauge by IC CA3162 + CA3161

The Car Temperature Gauge is basically the same circuit as March’s project with some minor changes to the input circuit. This circuit will display the water temperature to 1 degree resolution….Read more

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Automotive Speed Indicator

The speed of an automobile can be indicated by detecting the pulses generated by the ignition system and causing an LED to light. The circuit utilizes a quad NOR gate IC chip….Read more

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Simple but reliable car battery tester

This circuit uses the popular and easy to find LM3914 IC. This IC is very simple to drive, needs no voltage regulators (it has a built in voltage regulator) ….Read more