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rlage
5th August 2014, 04:25 PM
Hi!

I have build this simple linear regulator for those are interested on a low noise solution build with quality components.

- low drop LM2940CT-12 regulator
- light clip on headsink with arctic ceramic compound
- 22uF tantalum capacitor
- 470uF Rubycon ZLH capacitor low impedance ESR

Will handle 600mA.

http://fpvlab.com/forums/attachment.php?attachmentid=50024&d=1407270123

Will test on a Discovery with Fatshark 250mW VTx.

Plan to acquire quality choke and made a small hand made production to sale :roll eyes:.

Interesting?

Another project is a simple LC filter for using ImmersionRC 600mW VTx on a Discovery.

Derrick
5th August 2014, 05:33 PM
Hi!

I have build this simple linear regulator for those are interested on a low noise solution build with quality components.

- low drop LM2940CT-12 regulator
- light clip on headsink with arctic ceramic compound
- 22uF tantalum capacitor
- 470uF Rubycon ZLH capacitor low impedance ESR

Will handle 600mA.



Will test on a Discovery with Fatshark 250mW VTx.

Plan to acquire quality choke and made a small hand made production to sale :roll eyes:.

Interesting?

Another project is a simple LC filter for using ImmersionRC 600mW VTx on a Discovery.

I like your idea... however isn't it non-necessary for the application that you have chosen? Would work well with units that don't accept >12V inputs though.

Fatshark: Power supply 7 - 17V (2S-4S supply)
Immersion: 6-25V input voltage, 2S-6S LiPo compatible

Both units have a 5V filtered output. So if you couple it with a 12V step up converter, you can power a 12V camera

rlage
5th August 2014, 07:17 PM
Mine doesn't support (it's v2) neither other 12v VTx.

For those referred I plan to make a simple LC filter harness to connect directly.
And general idea is for purists using linear regulator only instead of step-ups or step-downs switched converters.

Byro
6th August 2014, 06:24 AM
I bought some SMD inductors. These can do 600ma and are 470uH. I'm making a 'clean' section on my power distribution board.

50048
http://www.ebay.com.au/itm/271450482446

rlage
6th August 2014, 08:00 AM
Very nice but hard to tell that the saturation current is so high 600mA.