Hoffman Amplifiers Tube Amplifier Forum
Other Stuff => Solid State => Topic started by: LooseChange on September 08, 2010, 10:15:30 am
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I have a 9v dc power supply. I want to double it. Got a simple circuit?
Thanks!
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Do a search on the net. There are tons.
I use one like 4-49.
http://www.tpub.com/neets/book7/27m.htm
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I don't think that circuit will work as it requires an AC source which gets multiplied in the rectification process. But loosechange has a DC source. A quick google search shows nothing simple; and there's a lot of wasted energy in the process. Might be simpler to go with an 18VDC source.
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What ToN points to needs _AC_ input. {as jjasilli typed faster.}
And that's really your cheep-n-cheerful option. Go to GoodWill (or my trashcan), find a 9V _AC_ wall-wart, wire pairs of diodes and caps to get 18V-24V DC.
Otherwise....
The dumb-answer is to tie a 9V battery to the end of your 9V supply. 9V+9V=18V.
There are standard chips to sing-up 5V-10V DC into "AC" and diode/cap-double it. Maxim is a big player. Doubler Pumps (http://para.maxim-ic.com/en/search.mvp?fam=chargepumps&828=Doubler&tree=powersupplies). ICL7660 and MAX1044 seem to be popular in 9V batt applications.
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There are little dc-dc-converter modules that do the trick. They are available for different power ratings and several input/output combinations. They are basically little black boxes with two input and two output pins. Prices are too low to bother with a DIY circuit.
You can find a lot of them in the mouser catalog: http://www2.mouser.com/Power/DC-DC-Converters-Regulators/_/N-5gc7?Keyword=dc+dc+converter (http://www2.mouser.com/Power/DC-DC-Converters-Regulators/_/N-5gc7?Keyword=dc+dc+converter).
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Ahhh, should have read the post more carefully.
So if this is coming from a 9VDC wall wart, perhaps use a 9VAC wall wart. Double it for your needs, rectify for your other DC needs.