? about dual batt mod

[go_zz_go]

do you have to mod the charger to get it to fully charge

[blacksabbath070]

good question you charge it for 180 seconds

[ax0n]

if you wire them in parallel, you shouldn't have to, but you may want to charge it twice in a row. If you wire them in series, then you won't be able to fully charge them (I.E. up to 24 volts) but either way it'll still increase the amperage, which is where the ZZ's are hurting compared to the bits.

If you wire them in series you'll have to find a way to put about 4 volts (I believe) across the charging terminals.

[go_zz_go]

thanks do you just leave it on after the light goes out? or restart it or just count sorry im as clueless as alicia silverstne (errr HOTT!!)

[go_zz_go]

ok yall answerewd my ? as i was typing thanks every one

[headhunter555]

I may be wrong(i dont think i am though) but if u wire them in a series u are gonna fry the board cuz its twice the voltage it was ment for.

[Namuna]

Ummmm...

Wired in Series = Higher voltage, more power to the Motor and faster.

Wired in Parallel = Higher Amp, more current and longer runtimes.

There's a reason why they call the dual-battery mode the 2.4v mod as well.

[Axel]

headhunter555,
Nope, this board can take a ton more than the 1.2v stock. I was running it off of a 9v for a couple minutes with no problems at all. Voltage is the key to hotrodding the ZZs.

[go_zz_go]

thanx for every thing i had to put my son to bed and come back to a plentiful supply of answers now one ? again i found there is plent room for three batteries aso let me run this by you all


three in a series= 3.6v right so is that three times the charge and i did that 9volt batt man it would kick road if we could get nine volts in a smaller package any i am not scared of frying it so should i go to the shaq and get the same stock battery ni-mh





love this forum tons of great info

[headhunter555]

cool ill have to give 2 batterys a shot then.

[cdo]

Hi everyone new here.

Can someone explain the difference between wireed in parallel and series?

Thanks

[headhunter555]

ok parrallow, is when u wire Red to red and black to black, this way the voltage is the same wether u have 1 battery or 2, BUT with 2 batterys wired this way the run time will double.

In a series is when u wire the possitive of one battery to the negitive of the other battery and then the remaining possitive to the hot and the remaining negitive to the ground of the board. This will mean havng the same runtime, but double the power to the motor, wicth mean the car will be almost twice as fast.

if that does not make sence lmk ll try to explain it better.

[ax0n]

Parallel:

http://buddha.jccc.net/~axon/grafix/par.gif

you get the same voltage, 1.2V even though 2 batteries are there, but it cranks a LOT more amps, it doubles the amperage output, this is where the Zip Zaps are really lacking.



Serial:

http://buddha.jccc.net/~axon/grafix/ser.gif

This ups the amps a little too, but not as much as parallel would. more importantly, it DOUBLES the voltage. If each of those batteries in the serial pic were 1.2Volt cells, the circuit would be getting 2.4 volts.


get it?

[cdo]

cool thnx alot guys, I dont know very much about electronics, thats why I run nitro R/C cars, with gas engine I am OK.

[Namuna]

Here's another look...As the rule of thumb, add volts in Series, add amps in Parallel.

[go_zz_go]

just wanted to say i think i killed a motor well it still turns but it is a lot slower what i did was hooked 9volts batt straight to motor to see rmp diff and said huh lets see what it can handel after a minute it was getting hot and slowing down it has since cooled down and has not resumed its normal rpm s dont realy care but i thought you might want to know

[ax0n]

I had the 12v battery hooked up to my turbo motor for about 1 minute. it still runs like a banshee. Matter of fact I think it's running better, it seems to have loosened it up a bit. Might be the "seat of the pants (err... thumbs)" effect.

[MTL]

har har, if the motor is really heating up, u might want to cut out your back window...which will look sort of "ghetto"...but itll help a little when its goin fast

[VDOGG]

So if I run a dual set up parallel, I'll get approx. twice the run time, and if I run it in a series, I get approx. the same run time as with a single battery but twice the power/speed?? (Sowy, but mez from the south and wez dont git viry much edukatioon hearr!! lol)

-Vince

[catman25]

so what wouyld benefit the zip zaps more parrelel or series.i wanna run a 3.8 motor if possible .thankjs -cat-

[go_zz_go]

i saw this somewhere for the 3.8 you need to run parralel i could be wrong as far asd just the dual batt with stock motors go for the series run time is long enough and it dosent take long to charge so hell yeaH GO FOR SPEED

[Axel]

Parallel would make sense for the 3.8 since it needs more current to run, not more voltage. But I think the series would probably give enough more current as well to make the 3.8 work ok. I ordered my 3.8 a couple days ago. I'll tell you when I get it which works best.

[Namuna]

Hold on now, are you SURE doing the dual-batt mod in Parallel is going to double the amperage going to the Motor?

Just because the electonics send double the voltage (when done in Series) doesn't automatically mean it'll do the same with the current.

[Axel]

Nope, I haven't tested this yet. I'm running the dual-cell series right now so it gets double voltage. I just found my electrical ohm/voltage/amperage meter last night so I'll try some stuff out today. I'm definitely thinking that even if it did double the amperage from the batteries there's probably a capacitor somewhere limiting the amperage on the board since people are saying the bit is getting almost double amperage compared to the zip with the single battery. I'll do some experimenting today and tomorrow and let you guys know what I find.

[Namuna]

...since people are saying the bit is getting almost double amperage compared to the zip with the single battery.

"People"??!!

...No, try NAMUNA SAYS the Bits get MORE THAN TWICE the amperage:
http://tinyrc.com/forums/showthread.php?s=&threadid=1501

I ain't 'people'. I'm NAMUNA! :eek: ;)

[Axel]

Hehe, sorry about that Namuna.

Thanks for the link to the post, I couldn't find it earlier.

Have you tried measuring the amperage with dual batteries in the Zips?

[Mattydiah]

Alright, sorry for bumping this thread from 10 days ago but I need to get something straight. I am not going for super long runtimes, I just want fast speed and lots of torque, wheelie inducing torque if possible. I just bought the 150mAH battery from the tinyrc parts store, so I am wondering which way is best to wire for what I am trying to do, series I am assuming? Which way will yeild faster speeds?

Also, will I have to mod the charging base on the controller for this?? Again, sorry to dredge this up from the depths of hell, but my other thread is getting no replies.

[PhillyB]

ok im just goin to throw my two-three cents in here

running parallel will give more run time - but it is not twice as much - its more like 1 1/2 times what you started with

also series will sometimes run out quicker - since you pull more volts and amps you lose some runtime (negligable loss - you may not even notice)

most motors are rated RPM X volts - so more volts = more RPM - i think the way to do it is series, unless you want to run forever - some people here have attached a dual pole switch to go from parallel to series wiring with the flip of a switch

im taking electronics class now - AC/DC fundamentals

also i have heard there are two resistors on the PCB of these ZZ but i dont have one yet (bought a bit clone, microsizer) so i havent cracked one open yet but i will soon - especially if i can fit 3 nimhs in there - resistors limit current (RS did this to extend battery life, but it kills the speed)

[Mattydiah]

Yeah, thats kind of why I'm doing the dual battery mod, so I dont have to go messing with the resistors.

[Axel]

Yes, series. You'll have to MOD the controller, but it's an easy MOD. just open it up and you'll see the wires coming from the charger to the PCB board. Just unattach these from the PCB board and resolder the respective wires to the plus and minus directly from the batteries. This will bypass the PCB controlled charger, but give you just under 3v which is about what you need to charge the mod. Should charge for like 3 min. NOTICE: You won't be able to leave your car on the charger anymore as it is running full time now. You have to time in yourself since you've bypassed the stock timer (and spiffy red light).

There's a lot more than 2 resistors on this board, but 2 that we know for sure are safe to bypass for stock 1 battery cars. DO NOT do this with 2 battery series cars. It could fry stuff because of too muh amperage. You can find instructions on which jumpers these are in other threads.

As far as which mod is better, the two battery mod seems to give more flat out top speed and overall faster, but if it's only torque you're looking for the resistor mod will help with that. But your battery time will be cut just about in half.

Hope this helped!

[Mattydiah]

Thanks for the info Axel, I'm going to do the mod in series when I get my battery. BTW, how long does it usually take to get parts from the tinyrc parts shop?? I ordered my battery last night.

[payaso]

Originally posted by Mattydiah
BTW, how long does it usually take to get parts from the tinyrc parts shop?? I ordered my battery last night.

If your in the US, you should get it by Thur.

silla

[Mattydiah]

Indeed I am in the US, I cant wait till Thursday now!!!