Automotive | Electronic Project Circuits

Posts Tagged ‘Automotive’

Intermittent wiper controller

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.

In Car lights delay

This circuit switch slowly on and off the internal lights in a car. The delaying time can be adjusted changing the values of the 10k, 4M7 resistors and capacitor.

The BUZ74 can handle voltages of 500V, but you can use any power Mosfet transistor that can handle more than 50V.

110VAC Inverter for Automobile by 4013, 555, 4020, and 4049

The design depends on the windings ratio and the value of the car battery to produce an AC waveform of approximately 95 volts RMS. No filtering is performed on the secondary since the transformer blocks most of the sharp edges from the input waveform.

All of the devices (4013, 555, 4020, and 4049) should have their supply pins connected to the +12 supply. The nice thing about CMOS logic is that it will operate over a wide range of voltages. Before connecting the center tap of the transformer, adjust R3 until the signal on U5 pin 13 is 120Hz.

The 4013‘s are used to produce a 60Hz square wave with an accurate 50% duty cycle and to force the FET switches operate in a break-before-mate manner. The 4049′s have enough drive capability to snap the FET’s off and on very quickly.

Read More Source:http://web-ee.com/schematics/power_conversion/
12-volt-automobile-inverter/

Be the first to comment - What do you think? Posted by admin - January 27, 2008 at 7:23 am

Categories: Automotive, Inverter Tags: 12v to 110v inverter, Automotive