HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Mar 17, 2015, 09:33 PM
flying beam
blackmoon's Avatar
through the Looking Glass
Joined Apr 2008
1,911 Posts
Ok I understand better now, thx for clarifying this, time to bed now, once again I forgot the clock.

Just for the sake of it I'll order some of the 22,33 and 68ÁH and do some tests, I was thinking going with a ferrite bead because they are smaller, but after some reading it seems that ferrite beads are more adapted for filtering over 1MHz signals. I don't think that the 8.5mm motors run at 4-8Khz (even taking into account harmonics) would produce noise at those frequencies, but as always I can be totally wrong.
blackmoon is offline Find More Posts by blackmoon
Last edited by blackmoon; Mar 17, 2015 at 09:40 PM.
Reply With Quote
Sign up now
to remove ads between posts
Old Mar 17, 2015, 09:36 PM
Registered User
midelic's Avatar
Joined Apr 2012
4,230 Posts
However the design with DC booster is superior so I think you should change also your RX design for booster because it is using 5 brushed motors(4servo +one) .,,,and it may reset when lipo is low voltage
midelic is online now Find More Posts by midelic
RCG Plus Member
Latest blog entry: DIY FlySky RX ATTINY85/45
Reply With Quote
Old Mar 17, 2015, 09:51 PM
flying beam
blackmoon's Avatar
through the Looking Glass
Joined Apr 2008
1,911 Posts
Yes but I want to reduce the receiver's size and weight (I've not totally dismissed the idea of my own actuators rx), adding the booster would only make it heavier and maybe larger.

I prepared for the worst case with four servos, I mainly will use 2-3 max, anyway I'll conduct some live tests and report back.

I'll be putting the rx into one of these Peanut toon profile warbirds, I was planing to use the v911 brick that I have, but now I'll test the rx it's even better.

http://www.rcgroups.com/forums/showthread.php?t=2248025

I'm also designing a profile toon warbird based on one of my preferred planes the Mitsubishi KI-15-Karigane, maybe that one will be the guinea pig.

http://www.rcgroups.com/forums/showp...6&postcount=69

Some other models I'll do : http://www.rcgroups.com/forums/showp...1&postcount=71
blackmoon is offline Find More Posts by blackmoon
Reply With Quote
Old Mar 17, 2015, 10:05 PM
Registered User
midelic's Avatar
Joined Apr 2012
4,230 Posts
If small bird with small actuators or small light servos for sure you don't need any booster.,,in fact I think it will work with smaller inductor like 33-100uH(but need testing)..The smaller the motors used(in servo) the better,As I said the booster design it is mainly for multiwii with 7X20mm and 8.5x20mm brushed motors.
midelic is online now Find More Posts by midelic
RCG Plus Member
Last edited by midelic; Mar 17, 2015 at 10:10 PM.
Reply With Quote
Old Mar 18, 2015, 01:58 AM
flying beam
blackmoon's Avatar
through the Looking Glass
Joined Apr 2008
1,911 Posts
It's what I'm thinking to, the small linear or rotary (1.7gr) servos are already filtered by their board, and it's only one motor 4mm-8.5mm. It's why I'm gonna order some 22-68ÁH so I can see if it's working with smaller inductors, I do know it works with 100-220ÁH.

If I make one of you mwii boards I won't forget the booster.
blackmoon is offline Find More Posts by blackmoon
Reply With Quote
Old Mar 19, 2015, 10:10 PM
Registered User
midelic's Avatar
Joined Apr 2012
4,230 Posts
I have found more affordable and better DC booster chip easier to find.,,.........to use in multiwii setup.
It is based on NCP 1402 chip(NCP1400 is also ok).It has better characteristics than previous one and uses the same trio (3 parts) inductor coil +capacitor+Shottky diode.See updated diagram with new chip also the diagram of an existing DC booster setup based on this chip and chip data sheet.See also ebay link with plenty chips.
Sparfun and polulu made DC booster setup based on this chip.

http://www.ebay.com/sch/i.html?_from...Text=&_sacat=0
midelic is online now Find More Posts by midelic
RCG Plus Member
Last edited by midelic; Mar 20, 2015 at 05:18 PM.
Reply With Quote
Old Mar 20, 2015, 09:23 AM
Registered User
Austria
Joined Jan 2004
8,696 Posts
Nice source code ...

Going to adapt this for use on the V686G

Thanks
e_lm_70 is offline Find More Posts by e_lm_70
Reply With Quote
Old Mar 20, 2015, 10:04 AM
Registered User
midelic's Avatar
Joined Apr 2012
4,230 Posts
Yes I heard about the new Flysky bird.From what I saw there not much modification.

http://www.deviationtx.com/forum/pro...otocol-variant
midelic is online now Find More Posts by midelic
RCG Plus Member
Latest blog entry: DIY FlySky RX ATTINY85/45
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Mini-HowTo TH9X Turnigy FlySky IMax modify module to SMA and 1W booster DIY FPV rotaryboots Radios 5 Feb 03, 2015 04:46 AM
Sold flysky th9x, flysky tx module, flysky 8ch rx snakecrew Aircraft - General - Radio Equipment (FS/W) 7 Oct 02, 2013 02:58 PM
Wanted Flysky 9x V1 RF module gdenton3 Aircraft - General - Radio Equipment (FS/W) 0 Aug 16, 2012 08:58 PM
Wanted Flysky 9x V1 RF module gdenton3 Aircraft - General - Radio Equipment (FS/W) 3 Sep 13, 2011 02:27 PM
Sold Flysky V2 RF Module, Antenna and 8 ch Receiver, $30 shipped CONUS ek123 Aircraft - General - Radio Equipment (FS/W) 0 Nov 20, 2010 01:43 AM