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worlok

Voltage regulator for video transmitter

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Hello,

I have a 1 watt video transmitter that operates off of 12V DC.

I keep hearing that if you use a voltage regulator or switcher, it lessens the amount of video flicker because the voltage stay constant.

My transmitter needs 12V @ 430MA.

Can anyone recommend a small VREG or Buck/Boost switcher.

My concern is that when Im running the transmitter the voltage falls below operational input voltage. Will a buck/boost switcher keep the batteries voltage at 12v even if the battery falls to say 9V or less?

By the way...I just ordered a patch antenna 8DB gain for the reciever..Does anyone know how much range improvement I should expect?

Any help would be greatly appreciated... worlok-AT-flxtek.net :huh:

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Worlok,

What you need is a DC-DC converter. You can even power your transmitter from one Lipoly battery!

You can use a 2000ma 3.7V lipoly and have a 3.7v to 12v voltage booster!

Here's a link to a commercial site:

http://www.cctvtoolbox.co.za/display_product_2247.htm

A 8db patch should double you range. (I assume you have the whip antenna now).

I've heared of people with a 600mw TX and a patch achieve ranges in the miles(!!!).

Hope this helps!

Let me know,

Gizmointheskywithdiamonds

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Thanks for the help.

Size of the battery is not really important. (Within reason)

Its not going on an RC vehicle or aircraft.

I would just like it to be the same size as an average 7.2 volt stick battery or shorter.

I need it to run my 1 watt transmitter for a minimum of 1 hour.

I assume thats why you suggested the Lipoly battery..

Any ideas?

Thanks..

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I keep hearing that if you use a voltage regulator or switcher, it lessens the amount of video flicker because the voltage stay constant.

It really depends on what the problem is. From my experience, video "flicker" is antenna related.

My transmitter needs 12V @ 430MA. Can anyone recommend a small VREG or Buck/Boost switcher.

The PT5041 is a popular boost DC-DC switcher that provides 12VDC @ 1A. The RC-CAM3 project used it.

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