Re: m26 pershing rear light

Kopral · Post by **Kopral** » Fri Oct 02, 2009 9:36 am

hi guys, need your expertise
i change my pershing rx13 with rx18,where do i connect the rear light to?
i try connecting it together with the head light but the head light goes off and if i disconnect the rear the head light goes again
thanks in advance

Tankie · Post by **Tankie** » Fri Oct 02, 2009 3:48 pm

Connecting to the headlights should be fine. Sounds like you need to check the wires to the rear light since what you describe may be a short circuit..

BREL · Post by **BREL** » Fri Oct 02, 2009 6:17 pm

you can not connect the rear lights to the RX 18 board

Kopral · Post by **Kopral** » Sat Oct 03, 2009 8:28 am

Tankie wrote: Connecting to the headlights should be fine. Sounds like you need to check the wires to the rear light since what you describe may be a short circuit..

but when i disconnect the head light the rear work fine

BREL wrote: you can not connect the rear lights to the RX 18 board

so where to ::)

Tankie · Post by **Tankie** » Sat Oct 03, 2009 8:46 am

Are you wiring the rear LED straight across the headlight ones (in parallel) or have you wired it in line (in series).
Have you tried swapping the wires to the rear light over? The ideas seem daft, but so is the problem.
There is no reason why wiring the rear LED in parallel with the headlights shouldn't work.

BREL · Post by **BREL** » Sat Oct 03, 2009 7:46 pm

Kopral wrote:
BREL wrote: you can not connect the rear lights to the RX 18 board
so where to ::)

I tried to wire in the rear lights on my bulldog to the front lights and found that the rear lights only worked so gave up, my bulldog has an Rx 18 board in it, there is no separate socket on the Rx 18 board to wire the rear lights, so if you bin the smoker as I do, you could use the smokers socket to wire in the rear lights on the Pershing or bull dog remembering to short out the smokers switch at the same time, I cannot get the lights to work using the above method because I use the smokers socket & switch to power a fan to cool the board, it switches on when you press the start button on the controller,

another alternative is to use the smokers socket for the rear lights and do not short out the smokers switch, but use the switch to turn the rear lights on and off as you desire

NigelDerEnglander · Post by **NigelDerEnglander** » Sun Oct 04, 2009 9:32 pm

Hi folks,

One thing you have to realise is that LEDs are Light Emitting DIODEs, not bulbs!
You can't wire them any old way round, in series, or parallel, without the due care and attention required for their polarity and voltage.
All differently colo(u)red LEDs drop a different voltage as well, so you can't wire a red directly in parallel with a white and expect both to work.

The number of combinations is too many to cover here, but if you make sure each pair of same-coloured LEDs are in series in the same direction with a 270 to 560 Ohm resistor you won't go too far wrong, or give each LED its own dropper resistor.

If the LED doesn't light, then swap the wiring. Test each LED before with a series resistor (use the 560 Ohm for safety!) across the battery pack to get the polarity right. DON'T test them when still wired up to your RX13/14/18/etc as I won't be held responsible for you shoving reverse voltages up your boards! "They don't like it up 'em".

Good luck!

Nige

Kopral · Post by **Kopral** » Mon Oct 05, 2009 8:14 am

NigelDerEnglander wrote: Hi folks,

One thing you have to realise is that LEDs are Light Emitting DIODEs, not bulbs!
You can't wire them any old way round, in series, or parallel, without the due care and attention required for their polarity and voltage.
All differently colo(u)red LEDs drop a different voltage as well, so you can't wire a red directly in parallel with a white and expect both to work.

The number of combinations is too many to cover here, but if you make sure each pair of same-coloured LEDs are in series in the same direction with a 270 to 560 Ohm resistor you won't go too far wrong, or give each LED its own dropper resistor.

If the LED doesn't light, then swap the wiring. Test each LED before with a series resistor (use the 560 Ohm for safety!) across the battery pack to get the polarity right. DON'T test them when still wired up to your RX13/14/18/etc as I won't be held responsible for you shoving reverse voltages up your boards! "They don't like it up 'em".

Good luck!

Nige

thanks mate,just did that and its working now so it seems i need to find the polarity on each led
this is my first tank to modify sooooo pardon my knowledge

thanks to all and if you dont mind another silly question in the future ::)

afv · Post by **afv** » Sun Nov 22, 2009 12:52 pm

Howdoo,
i'm disemboweling a bulldog with a blown rx-18 board and noticed an extra plug fitted to the multi plug, seems to be connected to the front lights and the rear lights have a matching plug to fit it but i've not tried it as most of the wiring was disconnected when i got it, i'll try for some pictures

regards Jack.

afv · Post by **afv** » Sun Nov 22, 2009 12:54 pm

Again