You own an old car and would like to scare off thieves? Build your own fake security system!
Parts Required (All available @Farnell.com)Check out the links next to the components!
- resistors: 1k, 10k, 680k Resistors
- capacitor: 10µF radial Capacitors
- LED: red superbright, 5mm diameter LEDs
- 7555 low power timer IC 7555
- 8-pin DIL socket for IC
- battery clip
- 4.5V battery box for 3 AA cells
- stripboard: 8 rows × 16 holes Stripboard
This Dummy Alarm project makes an LED flash briefly once every 5 seconds to imitate the indicator light of a real alarm. The circuit is designed to use very little current to prolong battery life so that it can be left on permanently. An on/off switch is not included, but could be added if you wish.
See the whole circuit after the break:
The components I received from Farnell
All you have to do now is soldering together the components according to this circuit:
After soldering everything together it looks like this:
You can put this little circuit into a black hobbybox, add some batteries and place it inside your car! The flashing red Led will hopefully scare off thieves and protect your precious car!
I hope you enjoyed this little and simple how to!
Come back for another tutorial on how to build a simple fast flashing Led circuit!
Thank you very much!
Here’s a little video if you’re interested: