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Subject Topic: Solar Powered Dusk / Dawn? Post ReplyPost New Topic
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Rob Iles
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Joined: 10†August†2005
Location: United Kingdom
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Posts: 5377
Posted: 19†May†2011 at 11:04pm | IP Logged Quote Rob Iles

Hi All,

Visiting a garden centre today, I picked up some solar powered LED
lights. Nothing special - PV collector charges capacitor during
daylight. When light level drops, the capacitor is then switched in line
with an LED - providing a little illumination.

£5 each, had to get some to play with

Now, if the led could be replaced with a transmitter of some sort, we
then have a self-charging wire free light / darkness sensor for
Harmony!

I considered a hacked BBS transmitter & 555 timer in monostable
configuration to send a quick On / Off as appropriate.

Then considered that the voltage / power available is very low.
Almost Certainly not enough to replace the battery in a BBS
transmitter, probably not even enough for a 555!

Adding a power source takes away the elegance of the solar charger.

So, is anyone here experienced in very low power consumption
electronics?

Seems eminently do-able, just needs some know how.

Anyone interested in discussing / working on a solution?

Thanks,

Rob
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