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>-----Original Message-----
>From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] 
>On Behalf Of Mike Reid
>Sent: 03 July 2007 16:22
>To: 'Microcontroller discussion list - Public.'
>Subject: RE: [EE]:: Electrically operated valve - home made idea
>
>
>I have a need for a cheap electronic water valve for an 
>electronic squirt gun I want to design for my son's tree 
>houses. We have 2 tree houses connected with a swinging rope bridge. 
>
>
>I want to design electric squirt guns that shut off after so 
>many seconds of shooting. That way the boys cannot just shoot 
>water at each other all of time. It would be like reloading a 
>real gun, it doesn't just fire all of the time.
>
>Irrigation valves for home sprinkler systems won't work as 
>they are too slow in their response.
>
>Does anyone have any suggestions here?  I might design a pic 
>circuit to handle the on/off timing of the valves.

Why not use a windscreen (US: windshield) washer pump?  They can produce plenty of pressure, though flow rate is fairly low, and you won't need to bother with solenoid valves etc.  A small 12v gel battery should have plenty of capacity for extended seiges ;)

Regards

Mike

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