Supply Radio
Does anybody know how to make a dc power supply?
I want to make a ac-dc converter so i can wire some led on my fish tank. The power supply form radio shack are pretty expensive and I know i can make one for cheaper and most of all I like to make stuff. So does anybody know a good website where I can find a layout of how to do this?
Well, I just went through something similar for lighting a dollhouse. I don’t know where you have looked at the prices of DC supplies, but the price difference between buying and building isn’t really that great.
Your biggest problem is getting the 120V AC down to a usable voltage level. The other two schematics provided for you will work, but the most expensive item is the transformer that steps the voltage down from the utility power. From the research I did around christmas time, those transformers alone were 75-125% the cost of buying a DC voltage source as a package deal.
In the quick once over I gave those other two schematics, it appeared that they were using a voltage regulator chip. Those chips are designed to accept a DC voltage and regulate (lower) it to a another DC voltage. Those chips can cost from about $1.50 to way more than you would want to spend. Some are fixed, producing only one voltage; or variable, producing a single voltage that can be adjusted to a range defined by the regulator design.
For what you said you wanted this for, it seems like overkill to use a voltage regulator. A simple Zener diode (with a resistor in series) could be used to provide a specified voltage to a group of parallel LEDs.
Another cost saver idea is to not use a voltage regulator or capacitors. The output of a bridge rectifer is a like a varying DC voltage pulse train (the bridge takes the one part of the sine wave and flips it to the other side, sort of like folding the AC wave along the y axis). So with standard US power that would make the pulses come at about 120 times a second if connected to an LED. I doubt your eye would notice the difference in output between a smooth DC and the high freq pulse train.
But the best all around way i can think of getting something you can use is to look for some garage/yard sales. Find something for sale that uses an external AC/DC converter and then salvage the parts you need (the DC converter iteslf and the receptacle it goes to). Then all you will need to do is hook up your LEDs and a (possibly) a current limiting resistor. I know it’s not as cool as building everything yourself, but if your on a budget it might be something to think about…
But if you do decide to build your own, bear in mind for your safety to include a fuse on the primary (high voltage side) of your circuit. I can’t imagine you pulling more than 2 amps, so i would think that should be fine. I would strongly recommend you add this, besides being a general protective feature, you are going to be using this near an aquarium, that i assume will be filled with water, and the higher moisture level can lead to some future problems.
Convert PC Power Supplies for use by Ham Radio Part II
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350W 13.8V 25.3A Switching Power Supply RADIO $23.00 |
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400W 13.8V 29A Switching Power Supply RADIO $28.00 |
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400W 60V 6.7A Switching Power Supply For Radio $28.00 |
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Air Supply (dj radio 45) Arista 0626 “Here I Am” $5.00 |
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XM Satellite Radio 5 Volt Car Adapter Power Supply $2.49 |
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250W 13.8V 18A Switch Power Supply RADIO $21.65 |
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350W 48V 7.2A Switching Power Supply CCTV Radio $24.35 |
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400W 13.8V 29A Switching Power Supply RADIO $27.06 |
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500W 13.8V 36A Switching Power Supply For RADIO PA $47.81 |
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500W 48V 10.4A Switching Power Supply for Radio $47.81 |
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540W 11-18V 30A ADJ Switching Power Supply RADIO CCTV $47.81 |
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New 13-18v Fatboy 200 Cb Ham Amateur Radio Power Supply $525.00 |
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SOLETEK 1326501 External Power Supply Skyway Radios NEW $8.50 |
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NEW 35 AMP SCANNER/HAM/CB/RADIO REGULATED POWER SUPPLY $148.90 |
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Becker Radio – Umrichter E Power Supply/Amp Tech Info $37.50 |
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Becker Radio – Umrichter G Power Supply/Amp Tech Info $37.50 |
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9 EF Johnson battery packs cb radio power supply e f $0.99 |
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Ham Radio Power Supply Cable Drake Clegg Hallicrafters? $9.99 |
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Vintage Swan Ham Radio Transceiver + 2 Power Supplies $182.50 |
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12 Volt 20 Amp Pyramid Power Supply Pyramid Ham Radio $66.00 |
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MAGNAVOX TUBE AMP RADIO Field Coil Power Supply VTG $24.99 |
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Vintage MARX ARMY SUPPLY TRAIN RADIO CAR – Nice $42.99 |
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1000W 13.8V 72A Switching Power Supply Radio $103.00 |
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1000W 48V 20A Switching Power Supply Radio $103.00 |
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400W 48V 8.3A Switching Power Supply For Radio $28.00 |
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500W 13.8V 36A Switching Power Supply For RADIO PA $49.00 |
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500W 48V 10.4A Switching Power Supply for Radio $49.00 |
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540W 11-18V 30A ADJ Switching Power Supply RADIO CCTV $49.00 |
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Radio SHack 12v regulated Power Supply 120VAC to 12V DC $40.00 |
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IOTA 55 Amp.Ham Radio / CB Power Supply FREE SHIPPING $213.00 |
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1000W 48V 20A Switching Power Supply Radio $135.30 |
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100W 13.8V 7.2A Switching Power Supply RADIO $13.53 |
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150W 13.8V 10.8A Switching Power Supply RADIO $16.24 |
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350W 13.8V 25.3A Switching Power Supply RADIO $24.35 |
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400W 15V 26A Switching Power Supply RADIO $27.06 |
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PP-308A /URR Power supply for a AN/GRR-5 Radio $69.95 |
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NEWIB LAMBDA 13.5V@14A NAVCOM GPS RADIO DC POWER SUPPLY $98.00 |
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Radio Shack 13.8VDC 3 Amp Power Supply Car AC DC 7 $21.95 |
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Radio Shack AC/DC Power Supply Adapter CAT#273-1653B $5.99 |
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RADIO SHACK AC/DC POWER SUPPLY ADAPTER MODEL#273-1771 $0.99 |
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RADIO SHACK 12V AC/DC POWER SUPPLY ADAPTER#273-1773 $9.99 |
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RADIO SHACK AC/DC POWER SUPPLY ADAPTER CORD CAT#25-3053 $9.99 |
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RADIO SHACK AC/DC POWER SUPPLY ADAPTER CORD CAT#43-2101 $9.99 |
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RADIO SHACK AC/DC POWER SUPPLY ADAPTER CORD#273-1757 $9.99 |
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RADIO SHACK AC/DC POWER SUPPLY ADAPTER#43-1047 et-547 $9.99 |
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RADIO SHACK 13.8 Volt DC, 15AMP, SWITCHING POWER SUPPLY $36.55 |
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Radio Shack 13.8VDC 3 Amp Power Supply Car AC DC **** $14.95 |
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cb radio indoor power supply $40.00 |
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XM Radio, Pioneer Inno, Home dock and power supply $26.01 |
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Zenith Model 12H092 Tube Radio Chassis & Power Supply $24.95 |
