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Old 02-14-2005, 04:25 AM   #31
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Quote:
Originally posted by Capone_GR
I was thinking of making one from PC power supply.
Is it possible to make one giving 20+A ???
You could, but it's complicated process to explain.

If you look closely, there is big IC 3040 type, double it and there you go.

For less headache, just buy intel pentium P4 certified power supply with highest ampere rating at 12V.
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Old 02-18-2005, 06:45 PM   #32
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Thumbs up Finished my Power Supply !

i finally finished building my power supply and wiring it up ! (12v 20amp x2 channel)

check out the link below for a pic

http://www.rcpics.net/view_single.php?medid=49807
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Old 02-18-2005, 06:53 PM   #33
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Integrated,

That's a nice power supply! Good Job!
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Old 02-18-2005, 07:02 PM   #34
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Default Re: Finished my Power Supply !

Quote:
Originally posted by Integrated
i finally finished building my power supply and wiring it up ! (12v 20amp x2 channel)

check out the link below for a pic

http://www.rcpics.net/view_single.php?medid=49807
all you need now is one of these.. so you dont have all those aligator clamps on your PS.



more pictures here: http://www.taobracing.net/review_powerstation.shtml
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Old 02-20-2005, 07:18 AM   #35
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Hey Hebiki - I thank you for the info. I just got done building mine, and I added some flare, blue and red LED's Check out the pics.
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Old 02-20-2005, 08:31 AM   #36
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Pic 2 - With lights on
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Old 02-20-2005, 09:02 AM   #37
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last one - from the top
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Old 02-20-2005, 09:13 AM   #38
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A note about LED's and power supplies. You need to match the correct resistor to the LED on the positive side of the LED (should be a longer lead) Use this simple formula to figure out the resistance. R=V/I

Lets say our LED is 3.8v and 30mA. That's all the info you need, other than the voltage coming out of your DC power source. My Rivergate 30amp puts out 13.5V so that's what I use in my formula.

So plug in the values to the following equation.

(DC power supply voltage) - (LED Voltage)/ LED Amperage (In mA) *1000

So using the example above -

(13.5V-3.8v/30mA)*1000 = Resistor value needed to buy
This comes to 323.3 ohms. So search out a resistor that is close to 323.3 ohms (most likely it will be a 330 ohm resistor) LED's doesn't matter if they're 1/4 or 1/2 watt resistors.

That's my electrical lesson for the day

John
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Old 02-20-2005, 09:46 AM   #39
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Quote:
Originally posted by John Fontaine
last one - from the top
aawwww yah thats what im talking about!

careful with that thing.. john travolta might start disco dancing in your pit!

what happened to the switches?
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Old 02-20-2005, 10:26 AM   #40
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I decided to ditch individual switches. I didn't want to compromise power going to the charger and affecting battery charge hense my chance to win the race by going through a switch (though i'm probably over-reacting, but it makes wiring a lot easier)
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Old 02-20-2005, 11:01 AM   #41
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Nice job Fontaine
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Old 02-20-2005, 11:06 AM   #42
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Quote:
Originally posted by John Fontaine
I decided to ditch individual switches. I didn't want to compromise power going to the charger and affecting battery charge hense my chance to win the race by going through a switch (though i'm probably over-reacting, but it makes wiring a lot easier)
i was just too lazy.
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Old 02-20-2005, 01:27 PM   #43
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It was a cool little project. When I was taking the pics I had it hooked up to a 9V bat. The LED's are MUCH brighter when I plug it into a power supply. This mod only cost about 5 bucks for the resistors, LED's and LED holders. 24 gauge wire, solder and shrink tube I had laying around. Oh, let me take a pic of the bottom for you guys so you know how I connected everything
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Old 02-20-2005, 01:32 PM   #44
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Here's the bottom. Each LED has a resistor soldered to it, then that lead is soldered to the positive line. Make sure the leads are insulated so there is not shorts since the pos. and neg. lines are exposed. LED's are very sensitive and will blow easily. Clean work yields to clean results
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Old 02-20-2005, 03:39 PM   #45
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Quote:
Originally posted by John Fontaine
A note about LED's and power supplies. You need to match the correct resistor to the LED on the positive side of the LED (should be a longer lead) Use this simple formula to figure out the resistance. R=V/I

Lets say our LED is 3.8v and 30mA. That's all the info you need, other than the voltage coming out of your DC power source. My Rivergate 30amp puts out 13.5V so that's what I use in my formula.

So plug in the values to the following equation.

(DC power supply voltage) - (LED Voltage)/ LED Amperage (In mA) *1000

So using the example above -

(13.5V-3.8v/30mA)*1000 = Resistor value needed to buy
This comes to 323.3 ohms. So search out a resistor that is close to 323.3 ohms (most likely it will be a 330 ohm resistor) LED's doesn't matter if they're 1/4 or 1/2 watt resistors.

That's my electrical lesson for the day

John
I just went with a 12v LED and placed in the middel of the box. Also I solder it to the last banna plug.... end of the positve/negative of the wires from the power supply to make sure the whole box has power. John and Hebiki both of your boxs look awesome with the gold speaker banna plugs....BLING BLING!!

BTW- picco007 did the box work...I just placed the LED

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