Hi there

I am working a Car security project which controls Door Locks via 433Mhz remote and GSM mobile. The basic Schematic is attached (Mobile phone SE T610 connections not shown). I am facing problems it running smoothly. It resets each time when door lock motor is attached or when car ignition starts.

When I attach the door lock motor (shown in the circuit) and latch the relay using programming, the ATmega328 resets and the Door lock motor shakes only. However, when there is no door lock motor attached, the LOCK / UNLOCK relay latches smoothly as I expect from the programming result.

Later I increased the Capacitor values to 1000uf connected befor eand after 7805. This helped a bit but fails in the car when car ignition starts.

 

Hello,

I am closing this thread as it violates AAC policy and/or safety issues.

Quote:
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Bertus