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Post by Jim on Sept 14, 2018 10:31:35 GMT
I just bought an adjustable 12v voltage converter to make a 7.5v supply for our radio Afaik a voltage converter uses less power than an inverter. www.amazon.co.uk/gp/r.html?C=148LYIXGS6DN9&K=3PO9H7SJ54CGR&M=urn:rtn:msg:20180831085953e969b29a7a244ba3bb8416a39250p0eu&R=75D77FEFULZ4&T=C&U=https%3A%2F%2Fwww.amazon.co.uk%2Fdp%2FB01KFJHPN0%3Fref_%3Dpe_3187911_248764861_302_E_DDE_dt_1&H=JJDCPOPLQKRFOIT11MIRZAGWKGGA&ref_=pe_3187911_248764861_302_E_DDE_dt_1I had to wire it up, find an old lead and plug to fit radio, and set the voltage with the adjustment screw on the potentiometer, using a meter. A small switch on the 12v in, I now have a permanently wired feed for the radio, mounted in a wooden box on the wall next to radio shelf. I'm considering getting another for the laptop. I bought something similar, more sophisticated, a while back, with a voltage display, in and out, but it didn't seem to work. Having played with the new one, I've realized the screw on the potentiometer isn't working, so going to get a new one and solder it in, then use the wire and changeable plugs from an old laptop charger, so I can change the voltage and plug to suit the device.
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Deleted Member
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Post by Deleted on Sept 14, 2018 12:02:44 GMT
How long before you forget to change it and blow up your laptop?
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Post by patty on Sept 14, 2018 12:30:41 GMT
These electrical wizards make my head spin....
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Post by naughtyfox on Sept 14, 2018 14:44:52 GMT
We have two 'music' radios on the boat (the term comes from the old days of Helsinki City Transport, 'music radio' as opposed to the radio for contacting the traffic centre) and we put batteries in them. Phones and iPad and camera get charged from the 350W Victron inverter. Why make life overly complicated?
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Post by markhez on Sept 21, 2018 13:43:57 GMT
We have two 'music' radios on the boat (the term comes from the old days of Helsinki City Transport, 'music radio' as opposed to the radio for contacting the traffic centre) and we put batteries in them. Phones and iPad and camera get charged from the 350W Victron inverter. Why make life overly complicated? Inverting 12v DC to 240v AC then transforming/rectifying that down to 5v DC is a lot more convoluted than transforming 12v DC to a lower DC voltage. As is going to buy disposable batteries and fitting them into radios when you have (presumably) a perfectly suitable system that you could just plug into! Why are you making life overly complicated?
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Post by naughtyfox on Sept 21, 2018 13:54:44 GMT
The inverter wuz in the boat when we gots it, and the phones and camera came with their own charging cables - seems simple enough to me. Also, with batteries, the radios can be moved. We have two - if we tune both into the same station we got stereo!
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Post by Jim on Sept 22, 2018 21:17:18 GMT
USB 5v/cig lighter sockets combined in a mounting plate, for phones and. Bluetooth speaker, buck converter 7.5v, to power a roberts duo logic with charger and batteries, all from China, more efficient use of my 12 voles. Cost maybe £15 and a little while to fit. Just rewired the fridge supply, fused direct line rather than sharing the lighting feed wire. Now the lights don't dim and trip fuse doesn't trip when all on.
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Post by phil70 on Sept 22, 2018 21:22:41 GMT
These electrical wizards make my head spin.... Are electrical wizards some kind of cocktail? Freddy Fudpuckers make my head spin after 2 or 3 Phil
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Post by markhez on Sept 25, 2018 10:31:41 GMT
The inverter wuz in the boat when we gots it, and the phones and camera came with their own charging cables - seems simple enough to me. Also, with batteries, the radios can be moved. We have two - if we tune both into the same station we got stereo! It's only simple if you don't understand what you're actually doing!
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