DIY Night blades - Page 16 - HeliFreak
Fun, Learning, Friendship and Mutual Respect START  HERE


Unregistered
Go Back   HeliFreak > R/C Helicopters > Night Flying


Night Flying Night Flying Helis Info


Reply
 
LinkBack Thread Tools Display Modes
Old 05-14-2012, 11:10 AM   #301 (permalink)
HF Support
 
Posts: 39,896
 
My HF Map location
Join Date: Jul 2007
Location: McKinney, TX
Default

Quote:
Originally Posted by mastmalang70 View Post
ohh thanks, so ,vf is a forward voltage
i need one with 3.7 volts any link
thanks again
Due to the semiconductor "stew" required for each color, I doubt you will find an LED in a color other than blue that will be able to take a straight 3.7-4.2V.

There's also the issue of the changing battery voltage as it discharges. It will start at 4.2V, so a 3.7V LED would be overloaded at first. It's possible the LED would survive for a while, but that extra voltage and the associated extra current is likely to gradually damage the LED until it fails. With a resistor, the LED can adjust its voltage and current as needed.
__________________
Alan (just call me "Bum"; no need to be so formal)
HeliFreak Support
Protos Max Evo 700 (Brain 2), Protos Max V2 770 (iKON 2), Synergy 516 (Brain 2), DT520Ev2 (VBar)
Graupner MZ-24 Pro

Experience is something you gain only after you need it.
I wouldn't mind social media so much if it didn't involve people.
TheBum is online now        Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 05-14-2012, 11:21 AM   #302 (permalink)
Registered Users
 

Join Date: Oct 2009
Location: belgium
Default

i saw on the site they also sold resistors ,and in the begining of forum there is a calculator ,only want to know what type of resistor i need ?????? here is the link for different type on the site
thanks
http://www.rapidonline.com/Electroni...-Potentiometer
mastmalang70 is offline        Reply With Quote Quick reply to this message
Old 05-14-2012, 01:32 PM   #303 (permalink)
HF Support
 
Posts: 39,896
 
My HF Map location
Join Date: Jul 2007
Location: McKinney, TX
Default

Quote:
Originally Posted by mastmalang70 View Post
i saw on the site they also sold resistors ,and in the begining of forum there is a calculator ,only want to know what type of resistor i need ?????? here is the link for different type on the site
thanks
http://www.rapidonline.com/Electroni...-Potentiometer
You'll undoubtedly want SMD (surface mount) resistors. I used 1206 sized SMDs on my blades because they were available locally at Fry's, but the 0805 ones, which are physically smaller, would work too.
__________________
Alan (just call me "Bum"; no need to be so formal)
HeliFreak Support
Protos Max Evo 700 (Brain 2), Protos Max V2 770 (iKON 2), Synergy 516 (Brain 2), DT520Ev2 (VBar)
Graupner MZ-24 Pro

Experience is something you gain only after you need it.
I wouldn't mind social media so much if it didn't involve people.
TheBum is online now        Reply With Quote Quick reply to this message
Old 05-14-2012, 01:41 PM   #304 (permalink)
Registered Users
 

Join Date: Oct 2009
Location: belgium
Default

ok here are my findings please advise
1 , for 2.5 vf and 25ma ,calculator showed 68ohms 1/4w resistor
2 , for 3.8 vf and 25ma ,calculator showed 18ohms 1/4w resistor
for both if i use 4 smd's in parallel and with each smd a resistor

if i wana use different vf smd simply change the resistor ????
Attached Thumbnails
Click image for larger version

Name:	SMD.jpg
Views:	234
Size:	66.4 KB
ID:	316518  
mastmalang70 is offline        Reply With Quote Quick reply to this message
Old 05-14-2012, 01:52 PM   #305 (permalink)
HF Support
 
Posts: 39,896
 
My HF Map location
Join Date: Jul 2007
Location: McKinney, TX
Default

Quote:
Originally Posted by mastmalang70 View Post
ok here are my findings please advise
1 , for 2.5 vf and 25ma ,calculator showed 68ohms 1/4w resistor
2 , for 3.8 vf and 25ma ,calculator showed 18ohms 1/4w resistor
for both if i use 4 smd's in parallel and with each smd a resistor
Those resistor values look correct. The second one should ideally be 16 ohms, but 18 ohms is probably the closest available for sale. I would suggest looking around for a lower Vf blue LED though because when the battery voltage gets close to 3.8V, that LED will dim significantly and finally extinguish. The place where I got mine has blue LEDs with Vfs of 3.1-3.2V. In fact, I'm running those particular blue LEDs on the tops of my blades.

If you're running the same LEDs (color and part number) in parallel, you can treat them like one higher-powered LED and only use one resistor. In that case, you'd keep the voltage the same but multiply the current by the number of parallel LEDs when calculating the resistance. If doing so would unduly complicate the placement of the foil traces, it would be better to use one resistor per LED.

Quote:
if i wana use different vf smd simply change the resistor ????
Yes.
__________________
Alan (just call me "Bum"; no need to be so formal)
HeliFreak Support
Protos Max Evo 700 (Brain 2), Protos Max V2 770 (iKON 2), Synergy 516 (Brain 2), DT520Ev2 (VBar)
Graupner MZ-24 Pro

Experience is something you gain only after you need it.
I wouldn't mind social media so much if it didn't involve people.
TheBum is online now        Reply With Quote Quick reply to this message
Old 05-14-2012, 02:10 PM   #306 (permalink)
Registered Users
 

Join Date: Oct 2009
Location: belgium
Default

Quote:
Originally Posted by TheBum View Post
Those resistor values look correct. The second one should ideally be 16 ohms, but 18 ohms is probably the closest available for sale. I would suggest looking around for a lower Vf blue LED though because when the battery voltage gets close to 3.8V, that LED will dim significantly and finally extinguish. The place where I got mine has blue LEDs with Vfs of 3.1-3.2V. In fact, I'm running those particular blue LEDs on the tops of my blades.

If you're running the same LEDs (color and part number) in parallel, you can treat them like one higher-powered LED and only use one resistor. In that case, you'd keep the voltage the same but multiply the current by the number of parallel LEDs when calculating the resistance. If doing so would unduly complicate the placement of the foil traces, it would be better to use one resistor per LED.


Yes.
Thanks The Bum you are very wisely helpful,one more thing i need to know about resistors,
is carbon resistors are okay instead of using surfadce mount resistors because they come in a package of 5000 pieces ,too much for beginner project
mastmalang70 is offline        Reply With Quote Quick reply to this message
Old 05-14-2012, 04:42 PM   #307 (permalink)
HF Support
 
Posts: 39,896
 
My HF Map location
Join Date: Jul 2007
Location: McKinney, TX
Default

Quote:
Originally Posted by mastmalang70 View Post
Thanks The Bum you are very wisely helpful,one more thing i need to know about resistors,
is carbon resistors are okay instead of using surfadce mount resistors because they come in a package of 5000 pieces ,too much for beginner project
You can, but they won't hug the surface of the blade as much. As long as you run them in a chordwise direction, you should be fine. Make sure they're 1/4W or smaller, mainly to keep the physical size at a minimum.

If you shop around, you should be able to find SMD resistors in much smaller quantities. For example, I know you can get them in single quantities at DigiKey. I don't know how much international shipping would be for you though.
__________________
Alan (just call me "Bum"; no need to be so formal)
HeliFreak Support
Protos Max Evo 700 (Brain 2), Protos Max V2 770 (iKON 2), Synergy 516 (Brain 2), DT520Ev2 (VBar)
Graupner MZ-24 Pro

Experience is something you gain only after you need it.
I wouldn't mind social media so much if it didn't involve people.
TheBum is online now        Reply With Quote Quick reply to this message
Old 05-15-2012, 01:49 PM   #308 (permalink)
Registered Users
 

Join Date: Oct 2009
Location: belgium
Default

Quote:
Originally Posted by TheBum View Post
You can, but they won't hug the surface of the blade as much. As long as you run them in a chordwise direction, you should be fine. Make sure they're 1/4W or smaller, mainly to keep the physical size at a minimum.

If you shop around, you should be able to find SMD resistors in much smaller quantities. For example, I know you can get them in single quantities at DigiKey. I don't know how much international shipping would be for you though.
it doesnt worth it ,shipping is way way too much , even from UK on the order of 6 euro i have to pay 30 euro shipping ,only option of DHL i guess
thanks for great help,learn a alot
mastmalang70 is offline        Reply With Quote Quick reply to this message
Old 05-15-2012, 01:51 PM   #309 (permalink)
HF Support
 
Posts: 39,896
 
My HF Map location
Join Date: Jul 2007
Location: McKinney, TX
Default

One more thing: I'd recommend that you use a tiny bit of epoxy to adhere the resistors to the blades, since they are significantly larger than an SMD.
__________________
Alan (just call me "Bum"; no need to be so formal)
HeliFreak Support
Protos Max Evo 700 (Brain 2), Protos Max V2 770 (iKON 2), Synergy 516 (Brain 2), DT520Ev2 (VBar)
Graupner MZ-24 Pro

Experience is something you gain only after you need it.
I wouldn't mind social media so much if it didn't involve people.
TheBum is online now        Reply With Quote Quick reply to this message
Old 06-09-2012, 11:39 PM   #310 (permalink)
Registered Users
 
Posts: 1,074
 

Join Date: Jul 2011
Location: Orange County
Default

Do you guys CA the batteries down in addition to using heat shrink. While testing my battery flew out of the heat shrink. Im using the heat shrink kavic posted on this thread from amainhobbies. I'm wondering if I need to just apply the heat shrink better but I'll probably CA it to be safe.

Also, thanks for all the information on here guys. This has been easier than I thought.
__________________
nqx, mcpx, mcpx BL, 130X, trex 250 pro DFC iKon, 450X, TBS Discovery, Trex 500 DFC iKon, dx9
TheHeliDude is offline        Reply With Quote Quick reply to this message
Old 06-10-2012, 02:15 AM   #311 (permalink)
HF Support
 
Posts: 11,383
 

Join Date: Aug 2007
Location: CA
Default

I use double sided tape underneath my batteries, then shrinkwrap tightly. Never had a problem.
ChrisH is offline        Reply With Quote Quick reply to this message
Old 06-10-2012, 01:06 PM   #312 (permalink)
HF Support
 
Posts: 39,896
 
My HF Map location
Join Date: Jul 2007
Location: McKinney, TX
Default

Quote:
Originally Posted by ChrisH View Post
I use double sided tape underneath my batteries, then shrinkwrap tightly. Never had a problem.
Same here.
__________________
Alan (just call me "Bum"; no need to be so formal)
HeliFreak Support
Protos Max Evo 700 (Brain 2), Protos Max V2 770 (iKON 2), Synergy 516 (Brain 2), DT520Ev2 (VBar)
Graupner MZ-24 Pro

Experience is something you gain only after you need it.
I wouldn't mind social media so much if it didn't involve people.
TheBum is online now        Reply With Quote Quick reply to this message
Old 09-04-2012, 10:40 AM   #313 (permalink)
Registered Users
 
My HF Map location
Join Date: Jan 2005
Location: Fishers, IN
Default



Here's a spin up of my new DIY blades.

Jon
__________________
Chaos 600E
Jonathan Ott is offline        Reply With Quote Quick reply to this message
Old 09-07-2012, 02:16 PM   #314 (permalink)
Registered Users
 
Posts: 583
 
My HF Map location
Join Date: Jun 2006
Location: St. louis,MO,USA
Default

Quote:
Originally Posted by Jonathan Ott View Post

Here's a spin up of my new DIY blades.

Jon
Nice!
__________________
No changes are permanent but...change is.
badastinner is offline        Reply With Quote Quick reply to this message
Old 09-09-2012, 12:51 PM   #315 (permalink)
Registered Users
 
Posts: 1,115
 
My HF Map location
Join Date: Mar 2009
Location: Oakhurst, California
Default

Oops
__________________
nothing to fly.....
powerstroke01 is offline        Reply With Quote Quick reply to this message
Old 10-01-2012, 10:30 AM   #316 (permalink)
Registered Users
 
My HF Map location
Join Date: Jan 2005
Location: Fishers, IN
Default

I just did these blades last night, and threw a video on YT.

__________________
Chaos 600E
Jonathan Ott is offline        Reply With Quote Quick reply to this message
Old 10-12-2013, 03:03 PM   #317 (permalink)
Registered Users
 
Posts: 376
 

Join Date: May 2008
Default 1206 LED's

Hey are any of you guys using 1206 LED's and if so do they need resistors. The data sheet also did not say what the viewing angle is. I really want to try and make a set of night blades. Any infor wod great.
Paulieb1979 is offline        Reply With Quote Quick reply to this message
Old 10-30-2013, 06:29 PM   #318 (permalink)
Registered Users
 

Join Date: Jan 2011
Location: indiana
Default solder led to resistors

Jonathan Ott,

Can you show us a close-up photo or your led to resistor soldering. im using 3528 led and 1206 resistors but I don't understand how you soldered them between just two strips of copper tape. Did you use small piece of copper tape between long strips
Thanks for you help. Doug
dheck123 is offline        Reply With Quote Quick reply to this message
Old 01-17-2014, 07:46 PM   #319 (permalink)
Registered Users
 
Posts: 1,098
 
My HF Map location
Join Date: Jun 2012
Location: Dayton, Ohio
Default DIY Night blades

I just watched a great YouTube series by Gus Petraits last night. I swear I've seen his profile picture somewhere on HF, Foghorn Leghorn. I didn't realize I had to use a 2 part clear coat on a nitro powered heli. I was able to get a gallon of Finish1 FC720 with catalyst at Sherwin Williams for $75. Should be able to do 100 blades and canopies with that. Hopefully I can get my buds to chip in and I can make their blades and clear their canopies. We gotta lot of nitro at our fielding Dayton. All my supplies should be here by Monday and I can start my winter project.

My first fun fly EVER was IRCHA. I've been wanting a night rig ever since. Gonna be sweet!

[ame]http://youtu.be/FEGmvcYM4U0[/ame]

Sent using Otto correct.
__________________
This is gonna cost me.
aburkhardt is offline        Reply With Quote Quick reply to this message
Old 01-18-2014, 06:20 AM   #320 (permalink)
Registered Users
 

Join Date: Jan 2010
Location: USA
Post

Quote:
Originally Posted by ChrisH View Post
I use double sided tape underneath my batteries, then shrinkwrap tightly. Never had a problem.
I've actually upgraded to the 3M Scotch Extreme mounting tape.

Had a single 350ma cell shift a bit under the shrink wrap with the standard indoor variety double sided tape. The old Hurricane 550 got a bit wobbly round the head bits.
__________________
Thank you Mr. John Taylor.
kavic5150 is offline        Reply With Quote Quick reply to this message
Reply




Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the HeliFreak forums, you must first register.
Please enter your desired user name, your REAL and WORKING email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself. Use a real email address or you will not be granted access to the site. Thank you.
Email Address:
Location
Where do you live? ie: Country, State, City or General Geographic Location please.
Name and Lastname
Enter name and last name here. (This information is not shown to the general public. Optional)
Helicopter #1
Enter Helicopter #1 type and equipment.
Helicopter #2
Enter Helicopter #2 type and equipment.
Helicopter #3
Enter Helicopter #3 type and equipment.
Helicopter #4
Enter Helicopter #4 type and equipment.

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On




Copyright © Website Acquisitions Inc. All rights reserved.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
 

SEO by vBSEO 3.6.1