Electrical problem in new bot

[psycho_fling]

hi all

we have decided to make a new robot (my dads) we are using 2 12v drill motors and their batteries. but i wired it all up but it didnt work,

the batteries were charged, there was voltage at the motors so the spedd controllers are suppling the power for the motors and the rx. but no power seems to be getting to the rx and therefore nothing will work.

we have checked everything, just used one battery and motor and even tried a SLA, but nothing.

WHAT TO DO?

cheers alex

[stu]

Electrical problem in new bot

What speedos are you using?
You reliying on the speedo supplying power to your RX or do you have a seperate battery for the RX?
is the servo wires and (rx battery) connected to the RX the right way round?

Mr Stu

[ewan]

Electrical problem in new bot

Do the speed controllers have BECs (battery eliminator circuits)?

[psycho_fling]

Electrical problem in new bot

the ones im using are from tech bots

and yes the wires are correctly connected

1500-014/015 Microprocessor Speed Controllers

Thanks

[blazerbotics]

Electrical problem in new bot

have you connected the two wires coming our of the one with the bec(normally orange) together?

[woody]

Electrical problem in new bot

and yes the wires are correctly connected
Ummmm ..........It may seem that way but a wiring error is often the cause.

Have you tried with a receiver battery and without the BECs connected ?

Its possible your receiver / transmitter may be faulty.......have you checked that it all works with a standard servo and battery setup?

[john_frizell]

Electrical problem in new bot

Troubleshooting! First thing to do is to reduce everything to seperate units and make sure each of them works. So:

-Plug your receiver into a servo and see if the transmitter operates the servo.

You said: no power seems to be getting to the rx and therefore nothing will work

Try running the receiver on its own
battery and see if that solves the problem.

Things often dont work the first time. Often the answer is easy but it does not appear that way. (Ive been unhappy with a robot that fails to respond only to find that that the transmitter and receiver cystals were not on the same frequency). Your problem may be an easy one you have not yet cracked. Keep trying.

[typhoon_driver]

Electrical problem in new bot

I agree with John on this one, the problem is usually something very simple which will be easy to sort but difficult to track down.

If you are using a BEC from the speedos, did you see if a voltage was coming from it to the receiver?

[psycho_fling]

Electrical problem in new bot

hi all and thanks

the reciever and transmitter im sure isnt faultly because it from Psycho fling.

im sorry but i havent a clue what BEC is or what is does?

thanks again alex

[psycho_fling]

Electrical problem in new bot

good news

we have managed to get it working forward,reverse, righ and left. but only with a external battery box for the reciever. can these be used in battles as it has it own switch?

thanks

[john_frizell]

Electrical problem in new bot

Well done.

A BEC is a battery eliminator circuit - it is a function found in some speed controllers which provides power to run the receiver. Yes, you can use a receiver battery with its own switch for a fighting robot. Remember to turn the receiver on before you put your link in, if you do it the other way you are likely to fire any weapon you have and the drive motors will twitch the robot.

[blazerbotics]

Electrical problem in new bot

Your 1500-015 speedo has a BEC, this will have two orange wires coming out of it, these have to be connected together to turn on the BEC, these wires are supplied if you wanted to put a switch, but the best thing is to just leave them connected so you RX powers up when you put your link in.

[john_frizell]

Electrical problem in new bot

If you do this, only connect up the orange wires from one of your two speed controllers. Leave the BEC of the other one off to avoid possible damage to your receiver.

[psycho_fling]

Electrical problem in new bot

neither have any orange wires, the ones in Psycho fling do but these ones dont Are they nessecary?

thanks alex

[john_frizell]

Electrical problem in new bot

It depends on whether you want to use the BEC or not. If you want to use it, you will have to turn it on. If you dont want to use it, just carry on with using a receiver battery.