[chaostic]

I want to build one of these http://www.thinkgeek.com/gadgets/electronic/79be/ since 25 dollars plus shipping seems a bit too much for a simple circuit like this. Does anyone know how to make something like this, or know a site where I can go ask? Thanks.

 

[dfhaii]

Just an astable 555 with an interval of 5 minutes and a buzzer would do the job, cost ~£2 to build.

 

[jerb]

they werent the first to talk about it ( or develope it) I vaugly rmember seeing it on bit-tech.net but a few google searches should yeild the artical

EDIT- this seems close to what your looking for http://store.qkits.com/moreinfo.cfm/MK104

try searching around for electric cricket schematics

 

[jerb]

heres a better kit http://www.transeltech.com/kits/nc-1p.html