Topic: jb3 external power II...

[fozzy]

http://www.bixnet.com/usbbatterybox.html

would this power a jb3? anyone use something like this ?

No.

It may work if you rig up a USB > Adaptaplug "B" cable but you could build a 4AA sled w/ cable for much less if you are going to the trouble of making a cable.

[rowjimmy]

I just picked up this : http://www.bixnet.com/hicamiexbapa.html

Has pretty much everything that the Digital concepts product has plus more power (4400mAh @ 5v).

The thing that sold me over the Digital Concepts product is that it was actually instock (i looked everywhere for the other) and i could get it before leaving for vegas.

[svenkid]

I just picked up this : http://www.bixnet.com/hicamiexbapa.html

Has pretty much everything that the Digital concepts product has plus more power (4400mAh @ 5v).

The thing that sold me over the Digital Concepts product is that it was actually instock (i looked everywhere for the other) and i could get it before leaving for vegas.

this looks pretty good, will it do the trick?

[rowjimmy]

Well, to condition it, I ran it down on my nomad...
ran for ~17 hours
recharged in 3
I'm not too worried but i'll give the lowdown after i put it through its real test @ vegoose this weekend.
All day @ the fest + moe latenight.

[svenkid]

good luck Row Jimmy, Ill be interested to see what happens
 

[rowjimmy]

Well, I don't think i even began to push it to the limits.
That said, it ran the jb3 without a hitch. during the course of the day I never powered down, just picked up my bag and ran it over to the next patch.

[seethreepo]

This is a much better way to power your jb3 $29.99 from Fred Myer comes with the ends to fit almost everything has a 5volt output setting and is rechargable from the wall and from your car.
4000mah lithium-ion with a little meter like the wallyworld battery only smaller.

I bought one  and it seems to work fine I dont have any shows in the near future anyone got run times?

+ t BLoodyJACK

[svenkid]

for RowJimmy
So I got one of those batt. packs, and I linked it to the JB3 with the smaller of the two yellow adapters, got the polarity lined up, tried both cables (big and small) out ofthe batt. and
1. the small yellow doesnt fit in all the wa, and its the only one that remotely fits it
do you recommend going to radioshack to get another adapter
2. Is there a secret for which side to use, the switch on the back?

Each time I try, the batt picture on the JB3 stays the same, suggesting that there is no batt. pack being used 

[rowjimmy]

the small yellow one is the one to use. it does not go in all the way which worried me at first but, it found it to be snug and it stayed in reliably while i was in the field (all weekend at Vegoose.) Rat Shack MAY have a replacement that is shorter but, I haven't looked. (Let me know if you do!)

Be sure you have the polarity correct, i don't know what will happen if you don't but I know that it works when you do. Connect the jb3 to the side of the battery that does NOT connect to the wall. (thats the laft side if you are looking at the front of the battery.

As for the switch on the back, be sure it is set to 5v as indicated on the label on the back.

when hooked up, it should indicate AC power is in use. I ran without the internal batteries all weekend.

BTW this one does have a capacity indicator on the top (4 leds indicating, <25%, 25-50%, 50-75% & 75-100% respectivly). And check out the size.



(sorry for the sh*tty image qual)

[svenkid]

thanks RowJimmy, and for the personal message 

[Krispy D]

so I have a couple of 9.6v rc batts but no charger...

can I feed it 9v at 1000mA from a ua5 wall wort and just pull it after 4 hours or so.  or is this gonna kill one of my batteries?  I'm gonna grab a smart charger but haven't gotten around to it yet.

[(((KB)))]

Does anyone know if this could work for a JB3?

http://www.dimensionengineering.com/DE-SW0XX.htm

(((KB)))

[poorlyconditioned]

Does anyone know if this could work for a JB3?

http://www.dimensionengineering.com/DE-SW0XX.htm

(((KB)))

+T for the link...

That is a nice packaging of a standard "buck boost" regulator, that uses one chip, two capacitors, and one inductor.  A fair price and a convenient packaging IMO.

But my advice for the JB3 is to try to get a 7.2V LiIon or NiMH battery and just run a standard (7805) passive regulator.  The power savings would be negligable.

I guess the active regulator might be good for a 9 or 12V input, but why not just get a 7.2V (two cell) Lithium battery?

By the way, I had a problem with the ESA 9V batteries: The battery itself would cut out if too much current was drawn (eg., running JB3 and charging its internal battery).  The ESA batteries are constructed with 7.2V internal and a *step up* to 9V.  So, I just soldered to the batteries themselves for 7.2V.

*Big caution* here, though.  Some people say that you should not mess with LiIon cells (eg., short, charge directly etc).  So, right now I'm using the builtin charge circuit, but not the output/step up stage.  I just run the 7.2V into a 7805 in then into my NJB3.

  Richard

PS: hey I think my bag just caught fire!!

[(((KB)))]

+T for the link...

No problem... thought it might be useful for someone. This company makes an adjustable switching regulator as well.
http://www.dimensionengineering.com/DE-SWADJ.htm

That is a nice packaging of a standard "buck boost" regulator, that uses one chip, two capacitors, and one inductor.  A fair price and a convenient packaging IMO.

But my advice for the JB3 is to try to get a 7.2V LiIon or NiMH battery and just run a standard (7805) passive regulator.  The power savings would be negligable.

I guess the active regulator might be good for a 9 or 12V input, but why not just get a 7.2V (two cell) Lithium battery?

By the way, I had a problem with the ESA 9V batteries: The battery itself would cut out if too much current was drawn (eg., running JB3 and charging its internal battery).  The ESA batteries are constructed with 7.2V internal and a *step up* to 9V.  So, I just soldered to the batteries themselves for 7.2V.

*Big caution* here, though.  Some people say that you should not mess with LiIon cells (eg., short, charge directly etc).  So, right now I'm using the builtin charge circuit, but not the output/step up stage.  I just run the 7.2V into a 7805 in then into my NJB3.

  Richard

PS: hey I think my bag just caught fire!!

I might be over engineering this whole thing, but my plan was to use my 12v battery pack (via cig lighter port or 9v port) stepped down to a 5v. I attached a shot of the SLA packs which I've been using for about 6 yrs now.

Any advice would be appreciated.

(((KB)))

[Rleeee]

This is a much better way to power your jb3 $29.99 from Fred Myer comes with the ends to fit almost everything has a 5volt output setting and is rechargable from the wall and from your car.
4000mah lithium-ion with a little meter like the wallyworld battery only smaller.

I'm a little slow so please be bare with me. Can I just plug this in to the JB3, or do I need to sift through ends to find the right one. And what would happen if I chose wrong.

                                                                R.