New Zz Pcb Mod - Page 3

catman25 · #31 10-11-2002, 08:57 PM

i soldier the two and i see no differanc e ..i thought i did but the 3.8 dont work and my friend brought over his and no differance..could i have messed up..and what kinda changes do you get ..also ..1 chip fell right off will that affect anything -thanks-

ts185r · #32 10-11-2002, 11:42 PM

I'm abvously not an expert. But I would think that if the ZZ still works then losing a chip didn't hurt anything.
And despite my anti mod additude I did the same thing. I lost achip as well. I didn't notice a differece in speed, I did notice a definate delay in the steering response.

model563 · #33 10-12-2002, 12:23 AM

hey there, long time lurker first time caller (well, lurker for the past week or two)

so im intrigued here. if one resistor is forward, one is reverse which is which? i dont really need the increased speed in reverse (and probably shouldnt have it). and by only bridging one resistor, mightnt you get some of that lost runtime back? (probably not enough to count, since itll be relative to the amount you drive backward)

Nightwing · #34 10-12-2002, 12:35 AM

Hum.

WIll be intersting to see if the power transistor will hold. Usualy resistor are put in line to protect the transistor from blowing. Simular to R15 in the charge circuit.

Could cut the value by paralling the same value across what is there now. Would give some protection to the switch transistor.

As soon as I can get two client project done, I am planing on ripping up both a controller and car to generate voltage points and the circuit for the receiver.

mrzipzap · #35 10-12-2002, 08:13 PM

based on my knowledge of computer, isnt this basically like over clocking a amd cpu using a pencil? ive done it with my amd cpu and its bridged gaps before, would this work?

mechanist · #36 10-12-2002, 08:53 PM

Quote:

Originally posted by mrzipzap
based on my knowledge of computer, isnt this basically like over clocking a amd cpu using a pencil? ive done it with my amd cpu and its bridged gaps before, would this work?

Probably not.

Graphite isn't a great conductor. It'll conduct but not very well.
With the AMD chips the idea is to just get a trickle of eletricity going through those bridges to disable the multiplier lock.

With this mod to the PCB the idea is to reduce the amount of resistance in the circuit. So you would want to shortcut around the resistors with a GOOD conductor. Good wire and solder job or something.

Graphite may get electricity going around the resistors. But it might not. Electricity is gonna take the easiest path and that may be the path through the conductor instead of the through the poor conducting graphite.

Nightwing · #37 10-12-2002, 09:04 PM

Hum.

Got this very strange idea. What if this is basically a booster style car with two speeds? And it sets for 1/2 speed? The TX-2/RX-2 chips set are basicaly 5 channel RC chip set.

Well I got a few minutes so will pop a controller and ground the magic 6 pin and see what occures.

Nightwing · #38 10-12-2002, 09:28 PM

Trainwreck!

Well it was worth a try.

All grounding pin 6 on TX-2 IC1 is stop the car.

I would recomend to find the value and cut it by 2/3 or 1/2 the value. If this is like most H configuration then those resistor are feeding like a flip flop. You could burn out the two top tranistors of the H.

marc515192 · #39 10-13-2002, 05:32 PM

This was what I was looking for!!!!!!!!

I like my ZipZap better than my bit but the bit could spin the wheels and the zip couldn't. (Man did I try) I tested at the motor and saw a substancial diffrence just didn't know which resistors.

Thanks

Mattydiah · #40 10-13-2002, 05:42 PM

Quote:

Originally posted by marc515192
This was what I was looking for!!!!!!!!

I like my ZipZap better than my bit but the bit could spin the wheels and the zip couldn't. (Man did I try) I tested at the motor and saw a substancial diffrence just didn't know which resistors.

Thanks

So did you get this mod to work?? I'm not exactly following you here. Since alot of other people seem to be dead in the water with this, if you did get it to work, I think I speak for everyone when I say POST HOW YOU DID IT!!!

marc515192 · #41 10-13-2002, 05:55 PM

Just dropped solder on the two resisters hasn't burned out yet.

Mattydiah · #42 10-13-2002, 06:28 PM

Well what did you mean by "just didnt know which resistors"? Did you solder the two resistors that were talked about in the first post of this thread (The resistors below Q5 and Q6? Can your ZZ spin the tires now?

Sorry, I just had a hard time deciphering your post there.

planogram · #43 10-13-2002, 07:38 PM

I did the mod, and my resistors came off, so I replaced them with a small piece of wire. I need a smaller tip for my iron. Anyway, I didn't notice a whole lot of top speed increase, but my acceleration is way better.

Mattydiah · #44 10-13-2002, 07:44 PM

How about battery life? is it super short now, or is it ok?

catman25 · #45 10-13-2002, 08:37 PM

i said this mod didnt work ..but thenm i used common sence and realized i didnt really shorten the gap..so now i took the damn resistors right off.and guess what ..not bit quick but a noticable differance .so i say go for it ..my run time decreased by half..and it still wont run a 3.8 :-(