Electronic, how to.....
 

Hi Everybody,

I am building (or trying to build) an alarm for my beautifull bike to keep it safe from people with bad plans.

I found the perfect siren, and have a "shock-switch" but now I need a time-delayed-relais.
Since I am in Paraguay, there are now IC,s or other handy bits... just resistors and elco,s.

The relais needs to stay "on" for about 30 seconds (or 1 minute) after being "triggered" by the shock-switch... I know this is a simple matter of a elco and a resistor over the relais... but that,s all I know... and the local electro-shop-owner can,t get it to work...

So.... HELP!!!!! I need a detailed discription (with the values) of the schema... or better yet, a drawing of it..

One important factor... the relay needs to switch the + on and off.

Thanks for your help... you electronic wizzard.

Maarten


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- www.maartensworld.com -
- Some photo's -

These might help.
http://www.aaroncake.net/circuits/relaytim.htm
http://www.aaroncake.net/circuits/relaytim2.htm
I haven't tried them yet so I have no idea if they're any good.

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A.B.

OasisPhoto.com – Images from the Magical Sahara.
ShortWheelbase.com – Jeep preparations.
Coordinates Converter – Lat/Long <-> UTM Conversion Tool.

Thanks AB,

But I think the IC,s might be hard to get here... But I,ll look around.

Maarten

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- www.maartensworld.com -
- Some photo's -