Door alarm Using 2x 555 Timers

742

13:36:29

The leftmost pushbutton should be replaced with a door contact, I used tin foil pieces that flick against each other when the door is opened, and the pushbutton at the top resets the alarm. If you make it, you should add a buzzer in series with the red led. The green led means it is active and all is fine.

published 11 years ago

lvillalba

11 years ago

How du u put value on the control?

eddowii

11 years ago

I do not understand.

lvillalba

11 years ago

The control pin is 3.33 V. Im asking if how did u do that

musiclifethiha

11 years ago

eddowii

11 years ago

It is like that by default but I didn't add the standard 0.01uF cap because it is not needed.

lvillalba

11 years ago

Thanks man

eddowii

11 years ago

Jax

11 years ago

Great job!

eddowii

11 years ago

Thanks. It always gives me motivation when people thank me for my work.

many68

10 years ago

Very good

dinudinesh

9 years ago

Hey

dinudinesh

9 years ago

Wonderful job..man...keep on going

RedJohn

8 years ago

Looks awesome

simonlovescats

2 years ago

lav leds

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