Topic: jb3 external power II...

[F.O.Bean]

before i packed up my things for the cross country move, i got the voltage regulator circuit to output 4.97V with an input of 7-24volts.  i should have the first prototype done for Bean to test out in the field. 

marc

i didnt wanna say anything till you did

im REALLY psyched about those mark, bet/hope this works like a charm

cant wait to be able to power v3 and jb3 when needed off of rc batts

[krebsy]

Nice!  At ts.com, help is always just around the corner!

[mmmatt]

Nice!  At ts.com, help is always just around the corner!

That is so true... this community is great.  It never ceases to amaze me how people jump up to help one another.  So unlike most online communities.  Almost never a scuffel either.  The people who make problems usually leave on there own accord, and the nice people remain.

Matt

[bagtagsell]

Well my little DIY project for the day was to build a VR like lee's.  But I got to thinking about powering my jb3 with stuff I had around the house.  I use to power my JB3 with an SLA>Radio Shack Car Adaptor with mulit voltage setting set on 4.5.  I began thinking why wire a board when I can just hack this thing.  So here is my latest solution.  It runs on a Walmart Lion battery.

Parts:
http://www.radioshack.com/product.asp?catalog%5Fname=CTLG&category%5Fname=CTLG%5F009%5F001%5F002%5F004&product%5Fid=273%2D1811
(I had the older model with a wheel like selector)
Walmart Lion battery
Power cable from Lion battery
butt connectors
wire striper

Open up the car adaptor.  Cut the read and black wires attached to the cigarett plug (Cut them as close to the cigaret plug as possible).  Strip off 1/2 and inch on insulation.  Hack the lion cable, cut it as close the tip as possible.  The tip opposite of the one that plugs into the battery.  Use a butt connector to connect the red wires from the cable and the red wire from the car adaptor.  Do the same with the black.  Screw the car adaptor back together and you are ready to go to town.  If you dont use the Lion battery form walmart you can use RC batteries, but but use a female connector.  Its really easy.







I took my dremel and hollowed out the old cigaret molding, so it protects my butt connectors.  Just b/c I could.

[aberg]

I'm a little confused. That first pic doesn't look like the same device as the radio shack one shown below.. can you be more precise in your explanation?

[bagtagsell]

the pic is of the old model car adaptor, the one I have.  I bought it a month ago at RS in town.  I couldn't find the exact part online, but I think they may still have it.  The first pic is the car adaptor with the top off.  Once you take the top off, the male car plug comes off.  The last pic is after I dremeled out the male plug so it would protect my wires more.  Hope that helps

[spyder9]

Bagtagsell, Could you post a picture of your complete power setup? UA5, JB3, battery, Ratshack adapter etc?  Thank you on a fine job.

[leegeddy]

here's a sneak peak of the Bumblebee "VR-JBox". the project has picked up steam again now that i got a roof over my head and all the west coast > east coast move is finished.

the above version is the 2 output model. input will be on the other side of the box via 4pin male.

mr. bean wanted a 5v/6v version to run his jb3/v3 respectively. hopefully he'll give it a whirl and provide me with some feedback.

marc
 

[F.O.Bean]

cant wait marc

[leegeddy]

I run the wally world adapto from 9.6 v rc batts with absolutly no problems... I don't have a part number but it was the bigger of the two available (2000 mah I think)

Matt

I made a call to the supplier/manuf of the car adapter I bought for this purpose and he said that the adaptor will step down voltages as long as there was at least a 3 volt diferential between the source and the output desired.  This is why Matt's experience is working WNP (with no problems).

I got a PM about this business and am still wondering why all the bother with ext. pwr for the JB3?  By now most of us have two of the things, with both batts and between the two... who can't run 12hrs?  What am I missing?  Or am I just missing the fun of the hack   I suppose if the batt supply does dry up one may need this option...

Carry on.

the main objective of the VR-JBox is to have multiple (and desired) voltage outputs so i can run various equipment and to minimize the size of the power supply.
 
personally, i don't open tape much. but when i do, i find it cumbersome to carry different power supply for my dats, pre, adc, etc. so if i can carry a single input voltage source, let's say 12v or 9.6v, and can have various output voltages like 4.5v, 6v and 7.5v then i'm all for it.

jb3's operating voltage range seem to be very narrow from what i've seen, and the best way (imho) to remedy that is via a regulated voltage supply.

...and diy projects are kinda fun too...

marc

[jdawg]

Cool box marc!  yeah, I think I mess around with this stuff just for the fun of it, but for 99% of the shows I tape these days the internal JB3 battery will do just fine.   Slightly off topic: I tried the Sony PlayStation 2 with the 9.6v r/c battery and it works great 

[BobW]

I have a Micrel MIC29502 circuit,a regulator w/shutdown.  All SMD, got the circuit from a Dutch RC plane site.
Very tiny, could fit in an XLR, don't know if it'll take 12v in or it's current capacity (guess 3A)  , it was built for my PDA   Very efficient

http://home.concepts-ict.nl/%7Edelemarre/id41.htm

[bagtagsell]

here are a few of the total package pics as per requested.  If you can't find the jb3 car adaptor your local RS will have something that works

[aberg]

That looks pretty sharp! That RS adapter though can't be rated much higher than 1amp... do you ever run into problems starting up the JB3?

[caymanreview]

That looks pretty sharp! That RS adapter though can't be rated much higher than 1amp... do you ever run into problems starting up the JB3?

the adapter they have here at wal-mart is 1.5amp