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1.5V @ 150mA (times 3, for 3 batteries in series), so 4.5V @450mA.http://en.wikipedia.org/wiki/LR44_battery
I took one apart over the weekend and noticed is has really low power requirements and has an easy to hack push button switch. The batteries are LR44 watch batteries, which according to public documentation provides 1.5V @ 150mA (times 3, for 3 batteries in series), so 4.5V @450mA.
i actually have a similar cheap laser pointer 4.5v @ 15mA (i tested the amperage with my multimeter) and need to make that exact circuit. I have everything except a BC337, but i do have a 2N4401 from radio shack. will this transistor be equivalent?
(hope you got it cheap)
This is what I use:http://www.sparkfun.com/products/8654
$18.95 just seems a little pricey for a $1.50 laser pointer; just saying
Quote from: BANE on March 07, 2011, 01:17:49 PM$18.95 just seems a little pricey for a $1.50 laser pointer; just saying That is, of course, if these things are worthless to you:- your time- size of the device- quality/reliability of finished product- TTL electronics built in
sorry guys, i didnt mean to set you guys off.
Vise versa, if you have a el-cheapo satern would you put the farrari engine in it?