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Automotive Wiper delay

2017-08-16 13:37  
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In the non-steady-state mode, ICl connect the drive RLA, C3, Dl and D2 prevent the relay coil and trigger ICl wiper motor spikes. RLA switch SW1 is held permanently (Wiper normal operation). VR1 is the main delay control and pro-vides from about 1 second to 20 second range. Magnification open VR2 adjusted to make the required minimum delay time.

Universal wiper delay 

The suppression circuit may be needed for the protection of ICl.The  relay should have a resistance of at least 150 ohms and have heavy duty contacts.

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