Circuit Board
This is a photograph of the NE555N based
Motorcycle Alarm No.2. The circuit features an intermittent siren output and automatic reset. It can be operated manually using a key-switch or a hidden switch - but it can also be wired to set itself automatically when you turn-off the ignition. By adding external relays you can immobilize the bike - flash the lights etc. The standby current is zero - so it won't drain your battery
