How to Make Bicycle Security Alarm Circuit

Hii friend,

Today I am going to make a circuit of bicycle security alarm circuit.when any body will touch bike then buzzer will activate and give sound.

Let's get started,

Components required -

(1.) LED - 3V x1

(2.) 8-Pin IC Base x1

(3.) IC - LM555 x1

(4.) Resistor - 10K x1

(5.) Resistor - 470 ohm x1

(6.) Battery - 9V x1

(7.) Capacitor - 16V 470uf x1

(8.) Buzzer x1

(9.) Metal surface

(10.) Battery clipper x1

Connect all components on the PCB according to the circuit diagram.

Solder IC Base on the PCB Board and short pin-4 to pin-8 as shorted in the PCB.

Next we have to solder 10K resistor between pin-6,7 to pin-4,8 of the IC base.

Solder 16V 470uf capacitor on the pcb board.

Solder +ve pin of capacitor to pin-2 of the IC and

-ve pin of capacitor to pin-1 of IC base.

Now solder 470 ohm resistor to pin-3.

Next solder +ve leg of LED to 470 ohm resistor and

-ve leg of LED to pin-1 of the IC.

Solder +ve pin of buzzer to pin-3 and

-ve pin of Buzzer to pin-1 of the IC.

Next solder metal wire to pin-2 of the IC.

Now solder battery clipper wire to the circuit.

Solder +ve wire of Battery clipper to pin-8 of the IC and

-ve wire of Battery clipper to pin-1 of the IC as circuit diagram.

and plug in LM555 IC to it's ic base.

Connect battery to the battery clipper.

Result : As you can see in the picture when I touch on the metal surface then LED is glowing and Buzzer gives sound.Like this when someone will touch on the bike then buzzer will give sound.

~ This type we can make bike security alarm circuit using LM555 IC.

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Thank you