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#1
05-02-2013, 02:24 PM
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Got a question for all you wiring guru's. I want all my components housed by my arduino, I really don't want anything sitting on a heatsink. For ease of replacement/service, I also didn't want to link the LED's to each other. I want to be able to remove a fixture and not have it affect the other 2. So I have thus far gone to fairly great lengths in planning to accomplish that. BUT, turns out I'm 1 wire short to my fixtures, DU'OH!!!!!!
I have 8 strings of lights = 16 wires. My fan requires 3 wires for power and PWM and the heat sensor for the heatsinks require 3 wires. For a total of 22 needed wires. But the wire I have only has 21  Is there any way I can share a wire in the fan/sensor circuitry? Or am I going to have to run 1 single wire for my sensor or fan? 
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#2
05-02-2013, 03:45 PM
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What kind of heat sensor are you using? I imagine that the sensor and the fan could share a common ground.
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#3
05-02-2013, 04:12 PM
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I'm was going to be using the DS18B20. It's got 3 legs on it 1 of which is a ground that goes to the Arduino's ground plane. I though maybe I could share that ground too but by Chris' schematic the fan grounds all go through either a 10K resistor or through a 2N3904 transistor and I wasn't sure if that would work...
Which actually brought me to another question about that 10K resistor. All I have here is a huge 3W10K resistor, will that still work in that fan circuit?
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#4
05-02-2013, 05:33 PM
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tagging along, this is really cool
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#5
05-02-2013, 11:58 PM
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OOOOoooohhhh, look what I got today
 
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#6
05-03-2013, 12:59 AM
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Quote:
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#7
05-03-2013, 01:38 AM
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Lol, ya the original was a bit small. I got my ampehol connectors in and a buddy of mine is a mechanic who works for highways has a crimper so I should be good to go. Although because the pins are removable, I think I can actually solder my wires on.
How's this pic for size: 
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#8
05-03-2013, 02:26 AM
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Wow I missed a lot here.... sorry work has been stupid the last 6 weeks.
Looks like you've made some great progress. You can use BC549, that's what I'm using as well. Just remember that the pin orientation (collector, base, emitter) is different on the 2N3904 than the bc549/547.
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All spelling errors are considered intellectual property of its owner, and are not to be tampered with Last edited by Chatouille; 05-03-2013 at 02:29 AM.
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#9
05-03-2013, 02:28 AM
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Yeah... that pic was small. I ended up emailing it to Dom shortly after.
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All spelling errors are considered intellectual property of its owner, and are not to be tampered with
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