Car electric window circuit

This basic circuit may be useful to control a car electric window. The electric motor is controlled by two relays.

If both buttons are pressed the nodes 1 and 2 take the same voltage, so the transistors keep off and prevent the relays from activating. By pressing SB1 the current flows through the D1-D4 diodes. If you press SB2 the current flows through the D2-D3 diodes. The car electric window can be stopped by pressing the reverse button, or by two limit switches.

Please note that this is just an hobby circuit. By installing DIY automotive devices you may get in trouble with your car insurance company.

car electric window

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