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2.4G Spektrum Radios Spektrum 2.4 Gigahertz Radios and Technology


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Old 10-23-2007, 08:58 PM   #21 (permalink)
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well........got the LED wired up with the in line resistor....after opening up the radio I see there really isn't really alot of choices where to mount it....I think I've decided to mount it under the speaker opening...

so all that's left is to cut the hole and mount it.....and hook up the wires,......

Now all that's needed is where to hook up the + wire to a switched circut...

I've fished around alittle inside the radio but don't know enough about PCB's to locate the switched side of the on/off switch on the board to piggy back....didn't wnat to fry my board by probing too much.....figure maybe someone on here who is smarter than me will donate the info
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Old 10-23-2007, 09:26 PM   #22 (permalink)
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It looks like you may have jumped the gun on wiring and heat-shrinking. From the looks of it that LED enclosure mounts from the front side. You may have to unsolder it to mount it and then redo it.

Have you hooked it up to see if it works and is bright enough?

I would think you could simply solder to the "normally open" side of the switch directly, and pick up the ground at the battery or nearly anywhere on the circuit board. Is the switch easy to get at? Can you post a pic of the inside of your radio?
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Old 10-23-2007, 10:31 PM   #23 (permalink)
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The LED is "plugged in" to a mini jack so I can un-hook it and change it out if I need to.......also, as you said, the led is front mounted. So I can mount it and than just plug it into the jack.....


as far as the LED.......I used one resistor and it looks to be bright enough to see in bright sunlight but not so bright as to distract you.....I tried two resistors in line and I don't think it would be bright enough to see on a sunny day........(I went with the red LED instead of the green one, as the green one seemed to distracting....

About the switch......well.....the pictures should tell the story..I'll break open the radio and post a couple of pics in a little while.....

it's not that obvious where to make + connection........I did "test" a few soldered posts but no light........then I got nervous and figured I better close it up before I'm shopping for a new radio.....

maybe the pics will give a clue.......
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Old 10-23-2007, 10:44 PM   #24 (permalink)
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K i did my part a whole how to guide from start to finish even with a coffee break in it

https://www.helifreak.com/showthread.php?t=49174
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Old 10-23-2007, 10:47 PM   #25 (permalink)
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here's some picutres......
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Old 10-23-2007, 11:12 PM   #26 (permalink)
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Quote:
Originally Posted by PTFlyer View Post
The LED is "plugged in" to a mini jack so I can un-hook it and change it out if I need to.......also, as you said, the led is front mounted. So I can mount it and than just plug it into the jack.....
Just shows what I know. Glad to hear it'll work out.

Looks like SB has been busy doing a super high-class job mod'ing and documenting. I haven't gone through his whole doc, but I'm guessing it'll answer all your questions better than I have.
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Old 10-23-2007, 11:24 PM   #27 (permalink)
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Quote:
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Looks like SB has been busy doing a super high-class job mod'ing and documenting. I haven't gone through his whole doc, but I'm guessing it'll answer all your questions better than I have.
I hope it helps someone if anyone has ? please feel free to ask
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Old 10-23-2007, 11:50 PM   #28 (permalink)
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I hope it helps someone if anyone has ? please feel free to ask


HELL YEAH!!! that sure does help........I tested my LED where you wired into the board and the LED lights up just fine........

I didn't move my strap mount as I alread have a balancer and I'm not comfortable taking that much of my radio apart....

I opt'ed to put my LED on top by my antenna.....just need to pick up a smaller soldering gun..I broke my small one about a week ago and all I have at the moment is a monster 150/230w with a huge tip....but it should work out just great once I solder my connections....

thanks for your help....
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Old 10-23-2007, 11:56 PM   #29 (permalink)
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Alright!!! now i feel better i did some good.
PTFlyer that looks like an awsome spot. i'm actually modifying mine with a resistor (you can't see it by the picture) but my LED is **** bright
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Old 10-24-2007, 12:34 AM   #30 (permalink)
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Alright!!! now i feel better i did some good.
PTFlyer that looks like an awsome spot. i'm actually modifying mine with a resistor (you can't see it by the picture) but my LED is **** bright

the LED I'm using is a 0.8mcd, the green one was 2.5mcd and was way bright even with two resistors in line.....so I went with the red one and still added a resistor in line to tone it down.......

I used a 470 Ohm resistor...if it's still too bright instead of using two just use a 1k Ohm resistor.....should calm that bright light .....

I found my old small soldering iron in my rolling tool chest and finished it up.......just wouldn't be able to sleep with my radio in parts...

Not too bright but I think I will be able to see it in daylight....

thanks again..

next is that back lit screen?
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Old 10-24-2007, 12:45 AM   #31 (permalink)
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the LED I'm using is a 0.8mcd, the green one was 2.5mcd
Yea mine is a 2600mcd and i usually night fly so its gona get knocked down

a Back light you say Now we might just be able to do that.
man we are gona have the bad'st a*s DX7's out there
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Old 10-24-2007, 12:53 AM   #32 (permalink)
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Quote:
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Yea mine is a 2600mcd and i usually night fly so its gona get knocked down

a Back light you say Now we might just be able to do that.
man we are gona have the bad'st a*s DX7's out there
You Know it.....!!
So...you just had to get the brightest LED you could find?....huh?.....LOL I fought that urge......
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Old 10-24-2007, 01:00 AM   #33 (permalink)
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You Know it.....!!
So...you just had to get the brightest LED you could find?....huh?.....LOL I fought that urge......
i could have pulled a 500 Lumen LED out of my Police Light Bar thats only about 39,777.2474 mcd's. but then i would have needed a car battery for my DX7
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Old 10-24-2007, 01:10 AM   #34 (permalink)
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Quote:
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i could have pulled a 500 Lumen LED out of my Police Light Bar thats only about 39,777.2474 mcd's. but then i would have needed a car battery for my DX7
It's pretty easy to find 5,000 to 10,000 mcd LED's in the common 5mm size that will run for many hours on any TX battery - in case you left your TX in another state and are worried you may have left it turned on.

However, the tricky thing about comparing brightness by mcd alone is that it's affected greatly by the viewing angle.
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Old 10-24-2007, 01:26 AM   #35 (permalink)
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very true i base most of my conversions on a average 120 deg viewing angle
This isn't exact by any means but
lm = 0,01257 x mcd
mcd = lm x 79,5544
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Old 10-24-2007, 01:48 AM   #36 (permalink)
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i base most of my conversions on a average 120 deg viewing angle
Excellent. That's the manly thing to do! I'm tired of reading specs of 10,000 mcd just to find a 15 degree viewing angle. I think if we can't agree on a standard and consistent measure of visible light output for LED's, then the terrorists have won (well... that might be just a bit much - but it's hard not to get emotional about these things. )
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Old 10-24-2007, 08:09 AM   #37 (permalink)
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i agree if your gona create your own unofficial standard make it good. I've been working with electronic circuits for over 10 years, professionally for a little over 4. i hate ppl (eB*y) and there 15 Deg CRAP!
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Old 10-24-2007, 08:47 AM   #38 (permalink)
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For my purposes I usually want the overall light output. This could be approximated by multiplying the brightness by the solid angle defined by the 1/2 power viewing angle, or by the power consumption times the efficiency. In the end I generally do the first calc, but it'd be handy if that was the published spec. Then we could move on to problems like world hunger, global warming, and risk of asteroid impacts.

Looking forward to your backlit display mod. Do you feel an instructional video coming on?
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Old 10-24-2007, 11:37 AM   #39 (permalink)
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I think that bright LED on top of DX7 case might be used as a flash light.
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Old 10-24-2007, 06:47 PM   #40 (permalink)
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Quote:
Originally Posted by 0636 View Post
I think that bright LED on top of DX7 case might be used as a flash light.
the one i got lights up my entire face during the day light

Quote:
Originally Posted by spork View Post
For my purposes I usually want the overall light output. This could be approximated by multiplying the brightness by the solid angle defined by the 1/2 power viewing angle, or by the power consumption times the efficiency. In the end I generally do the first calc, but it'd be handy if that was the published spec. Then we could move on to problems like world hunger, global warming, and risk of asteroid impacts.

Looking forward to your backlit display mod. Do you feel an instructional video coming on?
i don't know how to do a video of that nature. i might have to contact the helifreak god of videos himself and get some pointers
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