PDA

View Full Version : Wiring AA help...


seth98es
12-26-2003, 04:24 PM
So I am trying to wire 2 AA batteries into my Xmod. I am not using ANY of the AAA batteries, just 2 AA batts. So I bought one of those 2 AA battery holders from RatShack and wired the red wire to the red wire on the Xmod and the same with the black. But I turn it on and only can get the steering to work. The motor will not turn. Ive tried several different motors and I know it is not the motor. How am I wiring this wrong?

I have 4 2000mAH RatShack rechargeables right now and am going to see how just 2 of them do. Here is a pic of it wired right now(dont pay attention to all of the dirt and grime!)

seth98es
12-26-2003, 04:31 PM
whoops :P

seth98es
12-26-2003, 05:19 PM
Ok I wired up 4 AA batteries and it worked. But I only want 2 AA batts, so how should I wire that?

seth98es
12-26-2003, 06:48 PM
Heh I wired up the 4 AA batts and took it for a spin using the Red stage 2 motor and was a tad disappointed. I am used to using the white stage 2 motor, but some of the wires came loose and I couldnt find my soldering iron. I have a larger capacitor, but am I supposed to replace the smaller tan capaictor on the motor?

Anyone know why my car feels slower? I havent takend it outside(just ran it around my kitchen) but I couldnt get the tires loose at all. These batts are 2000mAh a piece compared to the 700mAh AAAs I was using.

RC 2NR
12-26-2003, 08:17 PM
The reason why its slower is because a AA has the same voltage as a AAA, so all your doing is adding weight.

seth98es
12-27-2003, 12:40 AM
Makes sense, but would a larger capacitor be able to take advantage of the larger mAh?

red02zx3
12-27-2003, 07:16 AM
The only thing your doing by adding the AA's is increasing the run time. The weight is going to slow you down. The capacitor is for the voltage.

pbmax
12-27-2003, 11:56 PM
Capacitors are normally used (in this case) to clean up voltage. They insure that voltage to the motor (among other things) remains relatively constant and stable. I believe they also reduce the amount of noise the motor throws back into the system.

I didn't do very well in Microelectronics in school...one of the reasons I went digital instead of analog ;) So I may be completely off-base! :eek:

red02zx3
01-05-2004, 07:29 AM
4 Duracells: 6V=dont need the 6 cell mod!
4 rechargables:4.8V
6 rechargeables:6V/AKA 6 cell mod
6 Duracells: 9V= too much Volts!

Jofir
01-05-2004, 10:53 AM
so if I put rechargables in my car instead of duracell's
then my car will be slower???

TypeZer0
01-05-2004, 12:08 PM
no because rechargeables can put out more current than alkalines so it makes up for the lost voltage by dumping out more current and believe me, once you go rechargeables, you wont' go back to alkalines

tavisjohn
01-05-2004, 12:21 PM
That is EXACTLY what I encountered! My car would barely run on carpte, till I got IC3's. now it hauls !!!

STR8_UP
01-05-2004, 06:45 PM
how about putting in one 9v batt.?

SupraRacer17
01-05-2004, 06:59 PM
hey i think that 9v is too much voltage

Joey
01-05-2004, 07:41 PM
The stock FET(s?) are only good up to 8.4V.

RC 2NR
01-05-2004, 08:01 PM
Originally posted by Joey
The stock FET(s?) are only good up to 8.4V.

Where'd you hear that?

Joey
01-05-2004, 08:04 PM
Here, somewhere.

red02zx3
01-06-2004, 06:10 AM
I think neurokinetik found out that bit of handy dandy news. Hes right though, there was a guy on here with a supra, who hooked up 9V and smoked his circuits.