posted January 28, 2000 09:34 PM         

Regards.

posted January 29, 2000 02:54 AM            

the output of the watch timer goes to the speaker with a small electrical signal to drive the beeper when the alarm goes off. this signal can be tapped by taking the watch apart and connecting to the right wire. it will actually be necessary to connect to two wires inside the watch, the signal output for the beeper and the ground of the battery (the minus side). these two wires you will have to connect some type of circuit to amplify and/or latch on a signal from the watch. this would be extremely simple circuitry but like i said earlier, although i could probably make one if i had to, i haven't so i can't really give you instructions. the difference between making something you think will work and actually getting it to work is usually quite a few hours of tinkering around with different ideas till it actually does what you want it to.

latching circuitry would consist of an scr or transistor along with a relay if the transistor wasn't enough to drive your output (ie it couldn't handle enough current to cause heating in a filament that would be used as your detonator). to make this work you would also probably have to use a nine volt battery or set of D cells. a simple timer with the external circuitry i would think you could fit in a decent sized pill bottle as far as size is concerned. as far as cost is concerned it would most likely cost less than $5.

how is all of that for a bunch of mumbo jumbo. if anyone is actually trying to make one of these things work and can't get it to let me know. if you just want step by step plans, too bad you're outta luck from this old man. i am not too sure what the standard procedure of posting diagrams here either hence no diagram.

posted January 29, 2000 03:30 AM            

ok i think maybe i can get pictures inserted now. that is the first design i would try and go with. the scr turns on when it gets a small signal on the gate and will remain on (it latches) as long as there is power applied on the anode or positive terminal. if you have an scr that will handle enough current for the filament you are using, the watch alarm will go off, the scr will switch on and current will flow through the filament causing it to heat and detonate your primary explosive. the filament could be a simple christmas light or a sturdier nichrome wire or rocket ignitor.

hope this helps the visualization of things.