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cheers hoverfly. antivirus spray a good idea  :D
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3d - Printworx

Printing 3d Forum

Hubsan X4 lights

Started by Ppuxley, Wednesday,January 30, 2013, 06:36:04

Previous topic - Next topic

Ppuxley

Wednesday,January 30, 2013, 06:36:04 Last Edit: Wednesday,January 30, 2013, 07:30:50 by Ppuxley
Here are a few photos of my X4 with lights and some notes on what I used
SMD leds and resistors
http://www.ebay.co.uk/itm/300778913069?var=600057335103&ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649
http://www.ebay.co.uk/itm/300821976472?
var=600068808637&ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649

And 34g enamelled wire. Maplin code: YN89W , you can use lighter, if your eyes are up to it! 
http://www.maplin.co.uk/productsearch?criteria=Enamelled%20Copper%20Wire
The leds are fixed with a small dab of epoxy and the wiring fits nicely in the grooves under the motor wires. You will need a steady hand , good light and a fine tipped soldering iron. You will obviously have to scrape the enamel off the wire ends before soldering.
Bring all positives together and all negatives together, extend each with a single wire and solder to the tabs at the back of the board where the battery leads enter below. These leds are diodes (the clue is in the name!) so they only work with current flow in one direction, so you must observe polarity. You will do no harm if you loose track of +/- to test it , but obviously make sure you have them sorted before you gang them together.

Gaza07


paulcobra

do you think the 4 new leds or even 2 of them be connected to the front to so they flash with the low battery warning along with the two original front ones?

paulcobra

Well ordered the bits and put two leds on the back of my hubsan, will do front two when my eyes are back to normal, these things are tiny.

Ppuxley

Saturday,February 09, 2013, 17:41:59 #4 Last Edit: Saturday,February 16, 2013, 14:39:32 by Ppuxley
Quote from: paulcobra on Wednesday,February 06, 2013, 03:53:34
do you think the 4 new leds or even 2 of them be connected to the front to so they flash with the low battery warning along with the two original front ones?

Possibly, I think the main problem would be picking up the pads for the blue leds on the board. Then I';m not sure about simply paralleling up the the new ones.Perhaps the thing to do would be to connect the board led input to a transistor switch which could be used to switch the power to the added leds.
See
http://www.kpsec.freeuk.com/t
rancirc.htm

I have just experimented on an old X4 board ,I had.It should be possible to mimic the on board lights with the use of  a PNP transistor eg BC178 with the base connected to the negative side of one of the on board leds, being used to switch the added led circuit when the output is low.
I only had a NPN (which switches on with base high- the opposite of what we want) but it proved the principle. Will report further when the part arrives from EBay.

Ppuxley

Sunday,February 17, 2013, 13:02:02 #5 Last Edit: Sunday,February 17, 2013, 20:44:00 by Ppuxley
Right this is what I have found works.Use a BC558 PNP Resistor
See video at
http://www.ebay.co.uk/itm/Pack-of-50-x-BC558-PNP-30V-100mA-500-mW-SILICON-TRANSISTOR-TO-92-/390543680769?pt=UK_BOI_Electrical_Components_Supplies_ET&hash=item5aee37a501
connected to the negative side of one of the onboard leds
1 Solder wire to negative of on board led
2 Connect this to the base of the transistor via a 1kOhm resistor
3 Connect the Collector of the transistor to ground
4 Connect your led from positive of battery to the emitter ,with a series resistor and observing polarity.
This transistor will be fine with at least 4 leds in parallel, see sketch
Green and Red leds will work fine with a series resistor of around 47Ohms,Blue leds may be a bit marginal, because of the voltage drop caused by the transistor they are close to their minimum operating voltage, although they did work on my set up, but with no series resistor

kinole06

Hi Ppuxley and Gaza07 :confused: i would like to know if any of you have done something like this and if yes :hmm: can you tell me how thanks :beer2: :beer2:.

Ppuxley

I must confess, you have me confused. Yes, I have done it and that';s what this thread is about. I think everything you need to know is written above
Patrick