You can buy converters that will generate 120VAC from a 12V battery. These are called inverters. Here is one that will work:
Just plug the wall wart from the telescope into it.
-- Regards, Bob Monsen
Hi all.
I'm looking at making a very simple circuit that will take an input from a car battery, then convert the output to 15v, the circuit will need to provide 2A maximum. (it's to power my telescope)
Basically, I'm looking to accomplish this with as few components as possible. Does anyone have a circuit diagram that will do this? If not can someone point me in the right direction?
Regards
Colin Dawson
Check out
-- Rich Webb Norfolk, VA
"Simple circuit" and doing what you describe do not go together in the same sentence. You're talking about DC-DC conversion, something that involves a fair number of components and good design skills.
That's the bad news. The good news is that there are ready- manufactured DC-DC converters available that will do exactly as you wish.
Based on your stated requirements, you can go a couple of different ways. Mean Well Electronics, part #SDM30-12S15, has an input rating of 9-18V, output of 15V at 1.7A, 80% efficiency. It'll probably run you about USD $35 or so.
As a point of interest, I use this same module in one of my own applications. It has proven to be very reliable.
For the ultimate in quality and reliability, go with Datel, their part #UHE-15/2000-D12. Average price seems to be about USD $60. It's available from Allied Electronics or Newark (the latter known in the UK as Farnell).
Whatever you decide on, you'll need a 30 watt unit with 9-18V input rating.
Happy hunting.
-- Dr. Anton T. Squeegee, Director, Dutch Surrealist Plumbing Institute. (Known to some as Bruce Lane, ARS KC7GR, kyrrin (a/t) bluefeathertech[d=o=t]calm -- www.bluefeathertech.com "If Salvador Dali had owned a computer, would it have been equipped with surreal ports?"
Thanks for the suggestions.
After looking at the ideas that you've shown me. I've come up with another solution.. I'm surprised that I didn't think of it before... I've got a
12v laptop power supply that's quite small. If I can get hold of another one, could rip the circuit out of it and use that.For the cost it'll be cheaper to do this than to build a circuit from scratch.
Regards
Colin Dawson
ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.