I recently found a big 12 volt PC fan in someone’s garbage (along with a fifteen-year-old mouse) that looks like it has a PWM cable. There’s a black wire, a red wire, and a yellow wire. I hooked up the black and red wire to a 9v
battery and it spun very quickly, but didn’t blow much. I’ll show a picture later. Do I need a relay? How do I wire it to a relay? What can I use the fan for?
I had a thread on this a while back. You could probably just hook it up to a motor controller if you want to be able to control the speed, but otherwise just give it power. Also, I happen to have that exact same fan sitting here next to me, it’s from a Win98 Gateway (teh suck!) You can run them directly through a motor port with out any major power loss.
I just mounted it to The Flexx to cool the battery.(possibly batteries because I want more battery life so the Flexx can go on long missions) I made it so you can manually turn it on and off. I’m just using a 9v battery. It works geat!:DYAY!!!
My idea was to have The Flexx AIR run for a long time, so I thought that the batteries might become hot. I might use to parralel batteries to make the robot run for a long time, plus I’m getting a vexplorer receiver which will run on 6 motors, plus the microcontroller (I don’t think it will heat up very much).
I have found a use for it. It’s really there just in case something gets hot, but it’s good to use when my microcontroller shorts. (I found out why it shorts. It’s because I wired the vexplorer cam badly)
I’s worth it, my problem was just that I made an arm for my robot and it bent the prongs. when I tried to bend them back, they broke off. I fixed it, but I didn’t have electrical tape, so it shorts every once in a while.
I had the benefit of growing up with a Grandfather who was an Industrial Electrician, an Uncle who is an Electrical Engineer and a Generally Mechanically Inclined and Problem Solving family. I learned how to Solder at 6 or 7 years old. Used Electrician’s Tape before that, and though that Heat Shrink Tubing was the greatest thing, when I discovered it in 1987.