micro_Amps

[micro_Amps]

Of course they do, thats the whole idea.
:)uA

[micro_Amps]

hehe, introductory RF radiation class, this reminds me of a story I heard of a night patrolman who, on cold nights, used to stand in front of a satellite dish (on the roof) to keep warm.
Only problem was that it was a high power microwave transmitter, and he was getting microwaved.
Im not sure what became of him, he either became ill or died, (or just had to be turned and then put back in for another minute or two)*shrug*
:)uA

[micro_Amps]

hehe, you guys crack me up.

A horse walks into a pub and sits down at the bar to order a drink,
Barman says, “Why the long face……?”
:)uA

[micro_Amps]

Looks like I’m making a late charge in the voting, damn, I should have voted for myself, then it would be equal.
I’m qualified in both, (and other techo quals as well) work on everything from mega electrical to micro electronic, but prefer the micro stuff.
If you dont need tweezers to solder it, then its too damn big.
:)uA

[micro_Amps]

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We’re going ont he boat via Melbourne, and do have a dayish where we could possibly catch up with people

Cool, hopefully we can organise something.
:)uA

[micro_Amps]

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Ya taking the boat from Sydney, or ya passing via Melbourne on the way…??!

Ditto.
There might be one or two people interested in catching up if you are coming through Melbourne and can spare the time for a latte’.
:)uA

[micro_Amps]

Trash it actually uses ‘elevons’.
They function the same as elevators for up and down, but go ‘one up / one down’ to turn, like ailerons.
These fly quite well.
:)uA

[micro_Amps]

I think we can probably let this topic slide now.
It is the end of an era, pity it had to finish this way.
But it seems now that all is said and done.
We have an excellent bunch of new (and old) and interesting posters on this forum so lets get on with it.
:)uA

[micro_Amps]

Must be a very slow day.
I voted for Jamie :smiley2:
:)uA

[micro_Amps]

Yes I think you are right Barto, there are a few extra sections that would ad to the post count.
Behind the scenes and moderators stuff.
:)uA

[micro_Amps]

Quote:

hey micro, didn’t you score some of those rims? From those hotwheels sets?

They were similar but different.
I have some of those Dub City cars, you can get them at Toys R Us, I wish they just sold seperate wheels sets. They look excellent, but the tyres are a bit hard.
:)uA

[micro_Amps]

Yes (and there is a thread here somewhere already on this topic) but different commands allow different pulsing rates. It gets complicated but it does work.
:)uA

[micro_Amps]

Now that is nice.:D
:)uA

[micro_Amps]

Inductors also alter the balance and ‘lag’ current in a mains AC circuit.
The out of balance caused by the inductor can be compensated/corrected by a capacitor.
This corrects the power factor of the AC circuit.
And this is way beyond anything needed in micro r/c cars, so forget you even read it.
Trash you are dead right, inductors resist the rate of change of an ac circuit.
:)uA

[micro_Amps]

SMP, I love your aerial idea, lol. A little Aussie humour there.
Your flatmate is correct, its called the ‘skin effect’ , electrons prefer to travel on the outside edge or ‘skin’ of the conductor.
The biggest difference that I have seen in terms of improving the range of the BCGs is the longer aerial. The higher the aerial reaches off the floor, the better the range. To prove this just put something on your controller so a button stays pressed, pick your car up of the floor and walk away with it. You will see just how far these cars can go.
The guitar strings work extremely well because they are light and thin, better in fact than the Cat5 wire which is heavier.
Having a telescopic aerial on the Tx improves range as well because the tip of the aerial stays higher off the floor. The droopy wire aerial doesnt do alot to for the range.
:)uA

[micro_Amps]

That is probably the timer circuitry.
:)uA

[micro_Amps]

Ah yes, the toothbrush. It really helps to give the gears a good scrub now and then.
Doesnt hae to be a tooth brush, just a small bristle brush.

Perhaps even a tiny dropper of silicon oil, works extremely well on the axels.
:)uA
PS. Sorry bithed, you caught me nappin’.

[micro_Amps]

Tweezers, for removing stuff that has wrapped itself around the front axels, or for soldering the steering wires.
:)uA

[micro_Amps]

Love, love LOVE dub rims.
They look excellent.
:)uA

[micro_Amps]

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I have no idea why they are called bipolar ?

Is it because they have unexplained mood swings?

A transistor is either PNP or NPN (pos-neg-pos or neg-pos-neg)
These 2 sets of ‘pole junctions’ is where the bipolar name comes from.
Standard transistors, as above, are also BJTs, or Bi Junction Transistors, for obvious reasons.

Betty.K if you are using a RXc2/TXc2 chipset thenn you have the option of using a turbo function as well, same as the booster cars, with normal speed on 1/2 and turbo on full speed. If all the pins on both chips are exposed that is.

:)uA

[micro_Amps]

Or go with low resistance (high current) fets instead of the transistors.

:)uA

[micro_Amps]

The shen motors are pretty fast, around 3.0 to 3.5, but I think the Tomy is a better quality.
You will probably find that they are close in speed, but the Tomy motor will outlast the shen motor in life span.
:)uA

[micro_Amps]

Just wondering, do they have a ‘PT’ writen on the main chip in the Tx and the Rx. If so what are the numbers following the PT on the Tx and the Rx?
:)uA

[micro_Amps]

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I wonder if uA can explain how he’d make it posible to drive a motor instead of the two coils.

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i’d be interested in knowing how to drive a motor instead of steering, if it’s not too difficult

Due to popular demand…….
Firstly, the drive circuit is controlled by 2 signals, forward and backward, these go into a H-bridge (4 transistors in a H formation) that reverses the polarity of the voltage going to the motor.
The steering controls also use 2 signals, left and right, if you were to couple these signals to a H-bridge which was connected to a motor, upon chosing ‘left’ the motor would spin one way, and chosing ‘right’ would make the motor spin the other way.

I have to refer to this pic again because it shows the connections of a simple H-bridge from a BCG.
Pins 10 and 11 are the forward and backward signals that turn on the transistors, but these could easily enough be substituted by the left and right signals from the steering control.
This is exactly the control method used in the micro tanks and some of the micro cars that have motor steering, eg the HSV cars.

I know this isnt the definitive answer, but if you can understand the H-bridge diagram then you are half way to converting the steering control to a motor.
If you arent 100% sure you might want to do some homework first.

Quote:

From the L coil wire you solder a diode (Anode).

Jamie, unfortunately most rectifier diodes have a forward voltage drop of around 1.2v, this kind of drop is too much in a low voltage circuit and would kill a large part of the current to the motor.

Quote:

Else I might have to write the next thread on diodes and bridge rectifiers !

Nooooo, please, no more……:smiley2:

:)uA

[micro_Amps]

You mst have a fair amount of spare parts building up by now.
:)uA

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