Motorcycle anti-theft device circuit design

Note:
Any number of normally open switches can be used. Fit mercury switches so that they are close when the steering is moving or when the bike is lifted off its sideways position, or is pushed off the center stand. Use micro switches to protect removable covers such as panels and panniers, while at least one switch remains closed, the alarm will sound. About two minutes after the switch has been opened again, the alarm will reset. How long it takes to turn it off depends on the characteristics of the actual components used. However, with a point increase, you can adjust the time to suit your requirements by changing the value of C1. The circuit board and switches must be protected from the elements. Moisture or condensation will cause malfunctions. There are no wiring terminals and the circuit board is small. Ideally, you should try to find enough free space inside to fit it inside the siren. Fit a 1 amp fuse close to the power line. This protects the wiring. Instead of using a key switch, you can use a hidden switch, or you can use a small relay with normally closed contacts. Wire the relay coil, which is energized when the ignition is on. Then every time the ignition is turned on, the alarm will set itself when it is not on, and the circuit uses almost no current. This should make it useful in other situations. For example, powered by dry cell batteries, relays and sirens to suit the voltage, it might be a danger of having a computer inside or anything else being picked up and taken away. Low standby current and automatic reset, that is, this external on/off switch might not be necessary for the application Support materials, the alarm circuit board, parts list, a complete build guide including a detailed circuit description and more.