K
kell
Gerald said:Hi,
I want to make a battery powered light, powered by a PIC.
I have a rechargable 6.6 volt battery, and a 5 watt halogen bulb.
Now, if I use a PIC and pulse the bulb at about 50% to get a dimmer
output, is it safe to guess that I would get about 6 hours light out
of this battery?
Also, at that power rating, can anyone suggest a transistor to use
that won't get too hot?
Thanks!
Gerald
Here's a possibility
battery
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halogen
light
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pwm_____10R_____|| RFP30N06LE
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ground
http://www.fairchildsemi.com/ds/RF/RFP30N06LE.pdf
The rfp30n06le is a logic level mosfet,
so your 5 volts will turn it on.
The mosfet won't draw any current from your pic
or555.
The mosfet has about a twentieth of an ohm resistance,
so it won't get hot.