Where to get voltage regulator 5v - RC Groups
Shop our Airplanes Products Drone Products Sales
Thread Tools
Aug 06, 2007, 12:56 PM
Registered User
Discussion

Where to get voltage regulator 5v


Iím looking to build/buy a voltage regulator (5v). Iím looking to power the video transmitter from a 3s li-po battery and was wondering if anyone can point me to a suitable UK based supplier.

I donít mind soldering or assembling components, but I just havenít figured out where to find one.

Any guidance/advice appreciated.

Dave
Sign up now
to remove ads between posts
Aug 06, 2007, 01:47 PM
Registered User
You should be able to get the parts for that in most any hobby electronics shop. Alternatively mail oder from e.g. http://www.farnell.co.uk/, or www.conrad.com, or other suppliers that seem OK if you Google for '"electronic component" uk'.
Aug 06, 2007, 02:43 PM
Suspended Account
If you're in the US you can get them at Radio Shack for less than 2 bucks. That's where I got mine. They have a diagram on the package to tell you where to solder the wires.
Aug 06, 2007, 02:46 PM
Registered User
Thanks guys.
I've just been on to the Farnell web site. I had no idea it was that easy.
3 pins 2 x capacitors and you're done..... or am I missing something?
Aug 06, 2007, 04:42 PM
Metallica
robe_uk's Avatar
you are in the uk so you may have a maplins store near you www.maplins.co.uk
Aug 06, 2007, 05:10 PM
Kite flying SCRAPS member
GliderGuideMan's Avatar
or you could try a UBEC such as the one on BRC Hobbies website. I use one to power my Canon A620 from my flightpack, it works a treat and you can get them for around 8 quid!!

Cheers
DaveB...>
Aug 06, 2007, 05:26 PM
RC Airplane Crasher
I used a TI switching voltage regulator to powwer my camera, it's more efficient than the junky linear regulators you get at Radio Shack, plus it can handle 1 Amp continuous and not get hot at all.
Aug 06, 2007, 09:56 PM
Pull out early!
DiveBombDave's Avatar
When powering a video transmitter, the switching regulators create a pattern of interference lines (called Moire' lines). Though less efficient and less tolerant of higher voltages, the cheap linear regulator adds no interference to the video signal. I use a buffered LM2905 on a heat sink for my planes that I care about the recorded video. On planes I'm just using the video downlink to frame shots, etc, I cheat with a switcher.

Dave
Aug 07, 2007, 03:00 AM
HeliAP'er!
Hogster's Avatar
Quote:
Originally Posted by davef27
Thanks guys.
I've just been on to the Farnell web site. I had no idea it was that easy.
3 pins 2 x capacitors and you're done..... or am I missing something?


It's really that simple


David

PS. I run mine off a 2-cell 1350mAh Tornado LiPoly pack.
Aug 07, 2007, 03:12 AM
Pull out early!
DiveBombDave's Avatar
Quote:
Originally Posted by davef27
... power the video transmitter from a 3s li-po battery .... Dave

I've had problems with heat using a 7805 on 3s.

Dave
Aug 07, 2007, 03:19 AM
HeliAP'er!
Hogster's Avatar
Yeah, go for a 2s pack. Otherwise you're dissipating (12-5)*(current draw) watts across something 10mm square! Say you're drawing 300mA, that's 2.1W .... good for warming your fingers when you handle it, but a waste of energy! With a 2s setup it would be nearer to 0.75W which is more reasonable.

I'm running a 10mW 2.4GHz transmitter AND my A620 off a 2s pack with a 7805 and it barely gets warm.

Cheers,


David
Aug 07, 2007, 05:18 AM
Smile & wave
Gray's Avatar
I use this little device from Perkins, not a bad price ether!

http://www.jperkinsdistribution.co.u...s%20and%20accs

Gray.
Aug 07, 2007, 05:38 AM
HeliAP'er!
Hogster's Avatar
Hmmm What do you use that for Gray? With those specs I would assume it's a switching regulator, which a downlink might not like ...


David
Aug 07, 2007, 06:35 AM
Smile & wave
Gray's Avatar
David,

I use it to power the A620 in the EZ* and uses the main lipo pack for power input with the BEC powering the RX.

Iíve not had the opportunity to use it with a downlink though!

Gray
Aug 07, 2007, 03:07 PM
RC Airplane Crasher
Dave, the moire lines you mentioned, do you think they would occur when just using the regulator to power a digital camera recording video?

That is what I'm doing, and I have not noticed moire lines, but do you think they could be there and I just haven't noticed them? Could they be lowering the quality without me knowing it? How easily can they be seen?

If I post one of my aerial videos could you tell me if you see any interference in it that could be caused by this?


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
x250 Where to get Lightweight Decal or graphic paper? costath Electric Plane Talk 4 Nov 25, 2013 08:13 AM
Does anyone know where to get Panasonic "high voltage" 3000s in the UK? Ben C Electric Plane Talk 2 Jun 30, 2002 07:07 AM
7.2-7.5V Voltage regulator Bleriot Power Systems 4 Dec 13, 2001 01:22 AM
Where to get decals? mikeb33 Electric Plane Talk 6 May 18, 2001 05:02 AM
Where to get RC and flying books Red Baron 47 Electric Plane Talk 2 May 08, 2001 07:59 PM