I don't completely understand the purpose of using switches. You can use a 12v regulator if the fan is a 12v fan, or if it's a 5v fan you just plug it into the receiver. Then you can use a switch on the receiver battery.

I think what he is trying to do is send either 16.8v or 8.4v to the fan depending on the switch position. I agree; a regulator would be in order, but makes the circuit a little more complex to achieve a dual voltage. 16.8v is just too much for a 12v fan if that is what he has.

Personally, I would just get a 6v fan and hook it to the Rx pack. If he still wants a slower speed, I'd put a few diodes in series to bring the voltage down. It's crude, but very simple and easy to wire up.

Heres a diagram. You can run your RX voltage or your total pack voltage (or 8.4 if you want. It all depends on the fan voltage). Switch 2 is optional, switch 1MUST be OFF if you turn 3 on and 3 MUST be off if you turn 1 on.

Why have switch one if it has to be off? The connection point right there isn't necessary (RX to fan).

HOW the switches are wired in, not correct. And i think someone here(can't read back that far) said they may not be able to handle the current anyway. So, with that said, REMOVE the switches completely, run your fan from your rx so you know it's only getting 6V, if you fry your fan when it's hooked to your batteries, it will create a dead circuit sort of speak. And, you may already know this, but your servo is GONE by now, and it so being, will also create problems.Run your fan with a Y connector with the batt, remove the switches completely, i think that's tha main problem or was...most importantly, when you rewire it up, draw it out first and then do it, TAKE YOUR TIME, you'll get it. Wire one thing at a time!

PS. I just got my 12020 wired tonight...IT WAS A PAIN IN THE ARS!!! TOO MANY WIRES!

Yup, like newuser said, I would just plug it into the REC....However, if you want to do it that way, theres my diagram above...

Metalman, who are you refering to?? I had a other diagram on there but had a problem with the wiring :p....

Hey Squee, not that it matters, but i notice you always do this. And I'm only saying this because someone asked me if my name was a typo, but it is suppose to be new-e-user! lol, you always put newuser! it's ok, i'll take it as a nickname!

Ooops! sorry :p....Don't feel bad...Serum always mixes up Ncazbnmaster's letters....On purpose though :p.

I don't feel bad, i thought it was funny actually, and to be honest, i see more than just you do it! It's like there is no e half the time! But, i am new sooo.....And the name i'm not even going there it's so long, i can see why with that in a sense....i can't even roll it off my damn tongue! NBo offense dude, in fact, what does it mean?

Anyways, back to business.....if i were him, i would remove the switches, check one piece at a time, and install with care...

Here is a different diagram using two switches and it's pretty simple. The diode pack is just 6 diodes in series to drop about 4v so the fan will be safer. The switches only need to handle no more than 3-5A, so they should be fine - they aren't carrying high currents.

BTW: Sorry for the crude drawing.

Good job BrianG - but squee has you beat in the area of artistic ways! Great diagram though, very simple...I think i'll print it! But you did forget wires to the rx...but i suppose you really don't need those cuz they are self expanitory

NewEuser, his name is actually nbcaznmaster. Which nbc is his schoo, and azn for Asian, and master for well, master..... Oh, and thanks for the compliment...I kinda like paint :p.

Yeah, I didn't want to spend much time - at least the idea comes through. :)

I didn't add in the other Rx wires because they weren't in the orginal drawing and I wanted to keep the power path clear.

BTW: The diodes can be generic 1N4001/1N4002 components available at RadioShack. 1A should be PLENTY for a fan.

How do you solder them would be good info to pass. i would but never used them, but may help him too. And thanks Squee for the E!:018:

I always wondered what that meant. I just thought he jammed on a bunch of keys and then added "master" to the end when creating his username! :005:

See! That's why your version is pretty; using that complex Paint program! I used crappy Paint Shop Pro. :dft012: