Total posts : 45366
(snip)“Hopefully, with the needed drop in supply voltage (as mentioned above) the receiver will consume less energy and operate from the sun.”
Of course, it depends on the current draw, but a 9v dc battery doesn’t have much available either so maybe it will work.
I get the feeling you’re trying hard to do this with just parts on hand, but FYI you can get a selectable voltage unit from rat shack designed for 12v dc input from a cigarette lighter socket.
ASIDE: Personally, I’ve never observed anyone lighting a cigarette from an auto lighter in 10 years … maybe it’s time to come up with a better interior 12v connector for trucks, cars, boats, etc. Whaddaya think? 😉
For my own pet project, I’ve started considering designs for a combo solar/wind turbine generator. But even with that, I could still run out of adequate power and have to go to backup, so does anyone have a detector circuit I can use for automatic power supply switching?