This is a design alarm circuit that can use in motorcycle. This circuit is built by transistors. This is the figure of the circuit.
For the operation of the circuit, the circuit board and switches must be protected from the elements. Dampness or condensation will cause malfunction. Without its terminal blocks - the board is small. Ideally, you should try to find a siren with enough spare space inside to accommodate it. Fit a 1-amp in-line fuse as close as possible to the power source. The fuse is there to protect the wiring is not the circuit board. Instead of using a key-switch you can use a hidden switch, or you could use the normally closed contacts of a small relay. Wire the relay coil so that it's energized while the ignition is on. Then every time you turn the ignition off the alarm will set itself. When it's not sounding, the circuit uses virtually no current. This should make it useful in other circumstances.
For the operation of the circuit, the circuit board and switches must be protected from the elements. Dampness or condensation will cause malfunction. Without its terminal blocks - the board is small. Ideally, you should try to find a siren with enough spare space inside to accommodate it. Fit a 1-amp in-line fuse as close as possible to the power source. The fuse is there to protect the wiring is not the circuit board. Instead of using a key-switch you can use a hidden switch, or you could use the normally closed contacts of a small relay. Wire the relay coil so that it's energized while the ignition is on. Then every time you turn the ignition off the alarm will set itself. When it's not sounding, the circuit uses virtually no current. This should make it useful in other circumstances.
