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Author Topic: My VR Box  (Read 3612 times)

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Offline rodeen

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My VR Box
« on: February 27, 2006, 11:47:30 PM »
I finally got around to building a voltage regulator box to power my Microtrack from a large 9 volt Lithium Ion battery.
I fully intended to buy a Juice Box from Todd Ramsden but was in the mood to try something simple myself. 
I ended up buying the parts from Aaron Dunlap.  For $9.50 you get a VR component,
a USB connector, some wires, a standard 9v battery holder, a switch, and an LED.  I threw most of parts away and only used
the VR component and the USR connector.  I also added a project box and a size "M" power connector from Radio Shack.
The project box included a small perf board and mounting hardware.  The Aaron Dunlap kit shows it mounted in an Altoids gum
container.  I thought about using one of the Altoid containers but it looked pretty cramped.  Maybe next time.  All told I have about $17 in parts and a couple  hours of labor into the project and suprisingly the thing worked   :o  Based on my experience, unless you like to
tinker with stuff like this, buy one from Todd!   :D

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Offline bconnolly

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Re: My VR Box
« Reply #1 on: February 28, 2006, 12:13:53 AM »
That is a slick looking box you have there.  I use a Juicebox myself because I'm really only comfortable hitting the record button.

Offline Chris K

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Re: My VR Box
« Reply #2 on: February 28, 2006, 09:09:50 AM »
which voltage regulator did you use?
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Offline thegreatgumbino

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Re: My VR Box
« Reply #3 on: February 28, 2006, 09:24:03 AM »
+T for the DIY project.
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Offline dallman

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Re: My VR Box
« Reply #4 on: March 07, 2006, 11:50:47 PM »
Holy smoke! I'm impressed.  :spin: How about some pics of the VR in action???
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Offline Brian Skalinder

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Re: My VR Box
« Reply #5 on: March 08, 2006, 12:21:47 AM »
Looks like no heat sink.  What voltage are you feeding it?  How hot does it get?
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Offline rodeen

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Re: My VR Box
« Reply #6 on: March 08, 2006, 10:35:13 AM »
Looks like no heat sink.  What voltage are you feeding it?  How hot does it get?

I didn't put a heatsink on it.  That will be a good addition to my second attempt.  I'm using it to
take a 9.6v Best Buy LIon DVD battery down to 5v to power my Microtrack.  I haven't field tested it
yet.  Probably this weekend.  The little bit I ran it while building it, the voltage regulator didn't seem
to get hot at all.  Warm to the touch but not hot.

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Offline Todd R

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Re: My VR Box
« Reply #7 on: March 08, 2006, 11:23:55 AM »
Good job, Rodeen!  Looks excellent, I'm sure it'll work fine for you.

On the heat issue, given the Microtrack's current draw and your battery voltage, you'll only be dissipating about 1 watt of heat.  That shouldn't be an issue at all, even without a heat sink.  I'd be more concerned about the lack of a fuse.  I like all power related equipment to have fuses to protect your expensive downstream equipment in case something goes wrong.  If you do any more tinkering, you might want to think about adding a PTC resetable fuse into your circuit.
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Offline Kindguy

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Re: My VR Box
« Reply #8 on: March 08, 2006, 05:33:25 PM »
wow T+ looks great.
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Offline Nick's Picks

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Re: My VR Box
« Reply #9 on: March 10, 2006, 04:24:48 PM »
i'd really like to know what VR you used.
i'm dying trying to build a 5v pack that outputs a 2amp current for my ACM660

Offline bdasilva

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Re: My VR Box
« Reply #10 on: March 18, 2006, 08:44:08 PM »
Lm7805??   


 http://www.iguanalabs.com/7805kit.htm 


crude filtering but it would work.
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Offline Nick's Picks

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Re: My VR Box
« Reply #11 on: March 19, 2006, 07:25:30 AM »
cool site.
thanks!

Doug has "ok"'d the use of 6v w/the marantz, so my problems are solved.

Offline rodeen

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Re: My VR Box
« Reply #12 on: April 12, 2006, 06:31:17 PM »
I based my box on parts that Aaron Dunlap put together.  I just ordered another couple sets
of parts from him and the VR included is a LD50CV.  I can't find any details on it though.  In my
next attempt I'm going to add a fuse (thanks Todd!) and maybe a heatsink although my current
box doesn't get hot at all.

i'd really like to know what VR you used.
i'm dying trying to build a 5v pack that outputs a 2amp current for my ACM660
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Offline Geoff G

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Re: My VR Box
« Reply #13 on: April 13, 2006, 02:58:29 AM »
I missed this the first time.  Glad it got bumped! Thanks for the photos.
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Offline Nick's Picks

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Re: My VR Box
« Reply #14 on: April 13, 2006, 07:19:37 AM »
i picked up a 7805 VR from the shack, and am building one of these suckas for my microtrack.

plan is:
8cell AA holder > vr w/heatsynch > USB mini cable coming out. 
the smallest project box they make is still way too big for my needs.  I might just epoxy the whole thing to the top of the AA sled.

 

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