Joined: 10†August†2005 Location: United Kingdom
Online Status: Offline Posts: 5377
Posted: 19†May†2011 at 11:04pm | IP Logged
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
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
Seems eminently do-able, just needs some know how.
Anyone interested in discussing / working on a solution?
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