Analogue Timer Switch - Using an Old Egg Timer




About: Jack Of All Trades

-this is not an instructable, this is just for showing you guys a finalized project-

Egg timer using nothing but its mechanical internal circuit to function as a timer for an electrical circuit a.k.a. no timer chip.

1x switch (on/off)
1x piezzo buzzer
1x blue LED (sanded)
1x battery holder
2x AA 1.5v Batteries (standard ones)

standard wire
hot glue
super glue
soldering iron
sand paper
dremel with drill bit

Edit: I've been searching for a similar timer so i could recreate the steps but I've had no such luck. I'm sorry guys :( The main thing here is to connect an LED lead (just the lead snipped from an LED) to the base and another to the moving gear of the watch. When they touch each other they form a connection. Use hot glue to avoid short circuits! I used the lead from an LED because it was the only strip of metal that was both hard and bendy and wouldn't lose shape on its own.

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    5 Discussions

    I really would like this as an instructable. I want to put it in a pinhole camera I'm making.


    10 years ago on Introduction

    When we were Kids, My buddy and i used to use an egg timer and a reed switch to set our little bombs and such (it's ok we lived in the boonies.)


    10 years ago on Introduction

    Wowwwwwww . i would really like an instructable for this its awesome Thanxxxxxx


    10 years ago on Introduction

    Wow. This is great. I'd like to see an instructable on this one. Anyone else?