micro_Amps
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Yes I have noticed this, and you are right, the high speed cars do have trouble tracking in a dead straight line.
If you were going to set them up properly you would need to slice them up and glue them back together symmetrically.
:)uAYes OTP, I have fet modded these, but there are fet mods and there are fet mods. This fet mod does nothing to enhance the performance of the car.
This is what I wrote in reply to the bitpimps thread………
I’ve fet modded these things, and the result is dissapointing to say the least. The problem is that the design of the control signals to the H-bridge (yes there is a full H on the pcb, 2 of them actually) only raises the gate voltage of the transistor (or fet) to a pulsed 900mV, barely enough to turn the fet on at all. The designers have tried to overcome this “half turn on” by stacking the negative transistor in the forward circuit, which helps, but comes no where near the potential speed that this car should be running at. To fully turn on a tranny/fet at least 2 volts, preferably 5 is needed. The IRLML2502 fets start turning on at 700mV, so at only 900mV they are only just turned on, and still in a high resistance state, thats why they dont conduct like they do in a BCG or Gen1 ZZ that has 3.3 volts available to turn on the transplanted fets.
I am still working on a couple of ideas (transistor combinations) to get a decent voltage across the motor from this H-bridge, but it looks like this 900mV issue is going to be the biggest hurdle to overcome now.
BTW, I tried running my ZZ SE on 3.6 volts (simulating a 3 cell) and there was no increase in speed, for the same reasons as above.
I dont know why they have done it, but they are using a 3 volt DC-DC converter to power up the control chip, which keeps the output driving signals at exactly the same values regardless of the battery voltage.(Oh well, thats probably why they have done it) You could run this car on 12 volts and it wouldnt go any faster.
I will keep trying, I want to see performance like that of a fet modded BCG coming from this car.More work needs to be done on these, just because a fet goes into a circuit and it works, doesnt call for “I have fet modded a car, yahoo” .It has to be a decent improvement, and in this case so far its not.
ph2t I have an Efini RX7, and 2 extras here for modding.(hopefully)
Beat me by 20 seconds Impreza, yep, I reckon you are spot on.
:)uAthey wont do anything until the cars that have those functions are released. The current cars dont have the functions for those buttons.
:)uAHehe, price I suppose.
I havent pulled it apart yet to see if I can mod it, still having too much fun just driving it around.
:)uAWhat the hell is a Dome Zero anyway????
:)uAHow much $$$ have you got Jamie, I might be able to find you one. :smiley2:
:)uAI am assuming one wil be boost and the other could be a function like the wild char-gs hook/scoop idea.
:)uAHeres some info I found on this baby,
They are out of stock but were selling for GBP300, thats AU$726, ouch.An LCD full colour display shows you where you are driving. Experience the rally as if you were actually sitting behind the wheel. Drive your own race through your living, trying to follow the perfect line as you steer the car towards the kitchen. Getting too dark to race ? No problem! Switch on your head lights with the button on the remote and the Turbo switch gives you that extra speed you require.
Also, great for driving around the office, looking up all the girls skirts…
Main Features:
-250k pixel CMOS sensor transmits live video footage
-1:16 scale Peugeot 206
-Dimensions: 27cm x 13.5cm x 10cm
-Front/rear suspension
-2.2inch/5.5cm LCD colour monitor
-Xenon Headlights
-Range: approx 15-20m
-Two channel transmitter/with brightness control
-Full function multi directional steering
-Transmiter and car require 6 AA Batteries each
-2 speed selector switch
-3 month manufacturer’s warranty
-Recommended for ages 6 and aboveHmmmmmmmmmmmm…………
:)uAIt worked for me, dont tick the box just click on the link “MyProjectTrack01” in the lower left corner, then on one of the individual picture options that come up.
Looking good Jeff.
:)uADave, those buttons in the Sbcg Tx are already in circuit, they are connected “Function 1” and “Function 2” , there is even an unused “Function 3” in there as well. But the info is just not available on the Tx at this stage. Also the car pcbs are not the fully optiones version that require these extra signals.
Once these are sold in the US, the Tx circuit diags will be available from the FCC, but until then it remains a mystery.
:)uAOnly very slightly, the vlotage to the motor is actually reduced with fets but because they flow more current they are a tiny bit torquier, but are SLOWER. And the torque is only a TINY bit higher, not worth paying for IMO.
:)uAQuote:how do u make these nerf planes fly? do they take off or do you have to throw them into the air?Talldude, you turn both motors on and throw it, and it flys away quite well. Controlls are good and you can do basic aerobatics with a bit of practice.
They are not exactly ‘nerf’ but they are foam and can take a beating, if they do break, you just use some tape and stick them back together.
I am looking at getting some ducted fan jets for mine to get it really moving.
:DuAGod stuff VR-4, these are very tricky to set up.
Would love to see some pics too.
:)uAI dont sell that many sets SMP, I just happened to have these spare. Keep an eye on ebay though, you can get some BCG bargains through there.
:)uASane as the history set, all black, 6000 made and all gone. Goodluck
:)uAI voted the 350z, gotta love the Nissans, but I like the Porsche too. But I see the enzo is in the lead.
:)uAThats some serious (micro)wattage coming from the from of those cars ph2t, looking good.
:)uAYep got one running around the kitchen, love them.
Propo control is good in both throttle and steering. They are faster in forward than reverse due to some transistor stacking on the pcb.
Could do with some more speed and torque (i’m working on that atm), but unfortunatly they are not able to be dual celled or mosfetted.
Still they are a good little car, worth the purchase ph2t, do it.
:)uAYes thats true Jamie, the solder holds it all together. Tomy have ditched the old (better) Rxc/Txc series of chips for a PT (Pericom Tecnologies) chipset. BamBow, big mistake. It may be cheaper for them to produce these, but the hardcore fans are going to stay away from them because they just dont function as good as they should.
I can only guess that the extra buttons on the top of the Tx will be boost and another function once they release cars that have these functions. But if they are using the same type of controls then forget it.
:)uAHave a look at the for sale section on this site too, I just sold 3 of those special ed skylines for $35 each including post.
:)uAQuote:Traction=BoringJamie, you ve got me all wrong. What I mean is that the chunkier tyres will spit out more “sand” whilst drifting. Nothing like a good rooster tail flying out the back of your bit whilst doing donuts.
:)uAQuote:Traction=BoringJamie, you’ve got me all wrong. What I mean is that the chunkier tyres will spit out more “sand” whilst drifting. Nothing like a good rooster tail flying out the back of your bit whilst doing donuts.
:)uAAdjusting (bending/straightening) the spring can also help straighten steering that doesnt work correctly.
:)uA
Thats a pretty good price, they dont get that low very often.
:)uA -
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