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mCX Blade (eFlite) Micro CX Helicopters Information and Help


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Old 10-18-2008, 06:59 PM   #1
aristo
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Default AC or battery power for charger

Ok working battery or ps charger is done.You will need a 390 ohm resistor(thanks widow) or 2 1n4001 diodes in series to operate the led indicator(either work just fine)if you use the diodes the silver rings go toward the led.

parts listing
1-power wallwart (radio shack 6volt 8oo mah or switchable from walmart)
2-power jack-radio shack size M Model: 274-1582 or size N Model: 274-1583
3-Diodes radio shack Model: 1N4001
4-optional resistor-390ohm any good componant electronics store
5-some red and black wire light guage.
6-solder and heatshrink

pull the pads off the bottom of the charger and remove the 4 screws and split the charger in half(careful there are wires in the top half)peel off the hot glue holding the led in or desolder the leads marking the pos.neg. sides.
unscrew and carefully remove the battery jack.Now you have room to work.drill a 21/64 hole whereever you want you chargers jack(I chose the rear of the top half as it an exact fit.)Fit your jack with the three prongs facing you.The right prong will be the jacks center tip, check it on a meter,the center and left prongs will read continuity with the charge tip unplugged.If you just plug in the charge tip with no ps hooked up the center will have continuity with the outer barrel of the tip.

1-unsolder the red power lead going to the circuit board from the batterybox positive(leave it attached to the cb)
2-solder a new red wire to the batterybox positive.
3-solder a black wire to the batterybox negative(you will have 2 negatives one to the circuit board and the one you added.
4-unsolder the tiny red led wire from the batterybox.
5-solder the red pos batterybox wire to the left jack post
6-solder the red circuit board wire and the resistor or diodes to the center post(remember if diodes the silver rings face toward the led black end towards post)
7-solder the black negative you added to the right post
8-solder the tiny red wire to the resistor or diodes and heatshrink them.
9-resolder the tiny black and red lead wires to the led(i hope you wrote down their orientation.

To test it with the batteries in check for voltage from the battery negative to the circuit board pos(6v or close) if you have voltage now plug in just the tip (no power supply )to the jack.Battery neg to circuit board pos shou;d show 0v.now add the powersupply with the center tip set negative you should now have solid 6v from neg batterybox to pos circuit board.
congrats put it all together and enjoy it.If you add your battery to charge and the led doesnt come on try reversing the red and black wire(the reason i said to peel off the hotglue is then you never have to cut the led neg and cant screw it up )

seems long but very very simple to do.Better to my flights are up from 5min to 7 so far.
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Old 10-18-2008, 08:46 PM   #2
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Awesome! I have been looking to do this mod, but don't have a 6 volt wall wart... guess I just need to buy one! How is your approach different (or the same as) this posting on page 3 of the "Official Blade mCX Thread" in this sub-forum?

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Originally Posted by martinpayette View Post
Ok, as promised here is my mod to get rid of batteries to charge your battery!!!

First things first: IS YOU DECIDE TO PROCEED WITH THIS MODIFICATION, YOU DO SO AT YOUR OWN RISK!!! IF YOUR DON'T KNOW ANYTHING ABOUT ELCTRONICS OR SOLDERING DON'T TRY THIS! ASK SOMEONE WHO KNOWS! I'M NOT RESPOSSIBLE FOR ANYTHING THAT COULD HAPPEN IF YOU DECIDE TO USE THIS INFORMATION!!

Ok enough whit the boring stuff! Basically what you need to do is unsolder all 3 wires that that goes to the battery tray. You should see 2 red wire and 1 black. Note that one of the wires is a little bigger than the other. The big red wire need to go to a positive (+) side of a 6V DC power supply that can handle at least 400 mA. If you are tempted to use the spektrum wall adaptor that come with a DX6i radio, DON'T! It's only good for 150 mA. The black wire connects to the negative/ground (-) side of the 6V DC power supply. At this poin your charger works, but the led won't. What you can do is follow the schematic that i attach to turn on the led that indicates that the charge is complete. You'll need a standard LED and a 330 Ohms resistor. Connect the anode of the led to the + , the cathode to the resistor (any side) and the other side of the resistor to the -. solder the small red wire between the led and the resistor.

That's it! No more batteries needed... a big help for the environment!!!
http://www.helifreak.com/attachment....0&d=1223101021
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Old 10-18-2008, 11:16 PM   #3
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with mine the jack is a switch.Just plug in and your on ac,unplug and the batteries just take over.You leave your batts in the charger if you want to become portable.
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Old 10-19-2008, 05:47 PM   #4
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Quote:
Originally Posted by aristo View Post
Ok working battery or ps charger is done.You will need a 390 ohm resistor(thanks widow) or 2 1n4001 diodes in series to operate the led indicator(either work just fine)if you use the diodes the silver rings go toward the led.
very cool. can ya post another pic with the lines pointing to the items saying what they are instead of over the item, and with a bit more light. my old eyes are having problems with the current ones being too dark.

thanks
Jerry
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Old 10-19-2008, 06:36 PM   #5
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yeah hold on and ill take some pics
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Old 10-19-2008, 06:46 PM   #6
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your the best bro
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Old 10-19-2008, 06:47 PM   #7
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Actually, if you could draw a schematic or picture, that would be awesome!
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Old 10-19-2008, 06:49 PM   #8
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both would be great. i like this mod better me thinks.
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Old 10-19-2008, 07:02 PM   #9
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I hope this helps shaggy
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Old 10-19-2008, 07:08 PM   #10
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your the best bro. my old eyes can see it much better. ball park what did it cost for the parts? mite look for a 6V wall wart instead of my switching power supply. just due to it's size. thanks again
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Old 10-19-2008, 07:30 PM   #11
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http://www.walmart.com/catalog/produ...uct_id=4529474

this walwart is fine the total cost maybe 17 bucks
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Old 10-19-2008, 07:32 PM   #12
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as long as it's a 6v power supply it's amp output doesen't matter as long as it's over 800mha? so a 2 amp output is just fine?
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Old 10-19-2008, 07:56 PM   #13
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it doesnt have to be 800 that number is just a safety net.the circuit will only use what it needs.
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Old 10-19-2008, 07:58 PM   #14
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here is a laymans schematic
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Old 10-20-2008, 09:15 AM   #15
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This looks like a comparable mode to what I did. Here's the drawing I had made.
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Old 10-20-2008, 11:41 AM   #16
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ok that's a 200 ohm resistor on the left? not familiar with the icon on the right. what is that? the female plug for external batteries/power supply? does the led still work with external power? if you could can you up the resolution on the image, or make the text larger? when i bring it up the text is blurry.
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Old 10-20-2008, 11:42 AM   #17
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Quote:
Originally Posted by aristo View Post
it doesnt have to be 800 that number is just a safety net.the circuit will only use what it needs.
that's what i thought.
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Old 10-20-2008, 12:39 PM   #18
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My gosh! RadioShack wants $29 for a wallwart... Walmart wants 14$ for a wallwart... these prices are nuts!

ebay has a 6V 1000mA Adaptar for less that $5! http://cgi.ebay.com/AC-DC-Adapter-Co...d=p3286.c0.m14
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Old 10-20-2008, 12:45 PM   #19
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yup they think they got gold i guess. well i'm off ta get the parts for Aristo's conversion. was talking to him on the phone, and he also removed the led, and trimmed the inside part of the led's hole so it stuck out of the case. makes it eraser to see the light further away.

best part of this mod it you can leave your AA's in, and plug in the charger. i'll post pics when i'm done.

Jerry
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Old 10-20-2008, 01:33 PM   #20
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Quote:
Originally Posted by shaggybirdman View Post
ok that's a 200 ohm resistor on the left? not familiar with the icon on the right. what is that? the female plug for external batteries/power supply? does the led still work with external power? if you could can you up the resolution on the image, or make the text larger? when i bring it up the text is blurry.
Sorry about that. The original is in my alblum at http://www.helifreak.com/album.php?a...pictureid=9348

See if that's better. It's a 390ohm resistor. The led functions the same whether you use the batteries, or have the wall wart plugged in. The thing on the right is the jack that the wall wart plugs into. In my case, I used a barrel connector. When you plug in the wall wart, it disconnects the batteries from the charger. The barrel connector disconnects what is connected to the outside of the barrel. That's why I switch negative instead of positive.
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