where to get cheap 3v -12v dusk/dawn photos 4 LED?

hi'
anyone have experience in building solar pathway lighting?? where do you find cheap dusk to dawn circuts for single leds or 1 watt or less?

Sure, assuming your battery is more than about four Volts, cobble one (or more up). Start with a MOSFET like the the Radio Shack IRF510 . Connect it's Source to battery minus, the minus of the load (the LED lights and drivers) to the Drain, load plus to battery plus. Now hook a photoresistor (like the ones in the Radio Shack assortment) from Gate to battery minus and a fixed resistor from battery plus to Gate. Start with a value about equal to the photo resisor resistance at dusk and adjust as necessary.

If you want really cheap, you can get the IRF510 at Jameco and several different photoresistors at a fracton of RS prices.

Doug Owen

hi cool thx.. i was using Hollysolar's 12v led dusk/dawns for yeard but i've bougt about 20 over 3 years, they keep going bad in the weather and are a bid expensive
thx
E