Simple 'fake' alarm: Flashing LED

[gvanto]

fake alarm led

Does anyone have the 2-transistor oscillator circuit for alternately switching 2 LEDs? I would like to install a flashing LED in my car so it looks like I got an alarm in there.

Also if possible I would like it to only run when the car is turned off ('94 Seat Ibiza diesel, beauty) without having to switch it off myself.

Any advice much appreciated,
gvanto

 

[olemp]

fake alarm blinking led

i suggest the transistor led flasher:

https://wild-bohemian.com/electronics/flasher.html

 

[blastronics]

flashing led alarm

:idea:
you can use LM555 timer configure as an astable oscillator.

try to experiment by using varaiable resistor to get ur desired output pulse frequency.

 

[david90]

simple flashing led

There are LEDs that flash without any external components. I have one right now. Go to sunled or something.

 

[gvanto]

fake led alarm

Thanks guys, the circuit suggested by Olemp was the one I was thinking of.

Any idea what the easiest point in a car is to check if the car is turned on? (and not the radio because its completely independant of the ignition)

many thanks,
gvanto

 

[david90]

led fake alarm

cigarette lighter! Use a transistor and do a simple pull up when the car is on and pull down when it is not.

 

[gvanto]

fake alarm flashing led

lol thanks but i dont have one!

thinking perhaps the fuse-box?

gvanto

 

[cyberblak]

make fake flashing led alarm car

Use the accesory output! It is powered only when the ignition is at the accessory position or if the car runs.

CyBeRbLaK