Taperssection.com
Gear / Technical Help => Remote Power => Topic started by: chase on December 04, 2003, 11:51:19 PM
-
so my buddy has this minime but no battery solution for it and won't shell out for the ecocharge stuff so i offered to build him a cheap SLA system. however, since this is not my minime, i want to be extra careful conisdering some of the fire stories from Daryan ;).
my question is what type of fuse should i put on this thing? From the previous fuses thread i have gathered that amp hour ratings are meaningless in determining fuses. from apogee's website it says that it's power consumption is 5.5W so....
5.5W / 12V = 0.458A
so should i go for a 0.5A fuse or should i use a little larger amp rated fuse, say 0.75A?
also, preferably this has to be operational by saturday for denson, anyone know any other nationwide stores besides radioshack that might have 12V batteries and chargers?
thanks!
-
Battery's plus
is it a rev c? if so it can run on 6v
-
>> however, since this is not my minime, i want to be extra careful conisdering some of >>the fire stories from Daryan ;).
good idea!! you don't want to shell out $$ if you fry the damn thing.
>>my question is what type of fuse should i put on this thing? From the previous fuses >>thread i have gathered that amp hour ratings are meaningless in determining fuses. >>from apogee's website it says that it's power consumption is 5.5W so....
>>5.5W / 12V = 0.458A
>>so should i go for a 0.5A fuse or should i use a little larger amp rated fuse, say 0.75A?
750mA sounds adequate and it gives you some room slightly above 500mA. i recommend fast blow fuses as well. i'm trying to convince few folks that 500mA is NOT a small amount of current!! it's useless to stick a 5A fuse on a device that draws only about 10th of that amount.
>>also, preferably this has to be operational by saturday for denson, anyone know any other nationwide stores besides radioshack that might have 12V batteries and chargers?
you may want to go through your Yellow pages and/or internet and find some hobby stores in your area, expecially the ones that carry remote control cars boat, cars, etc.
they usually carry SLA, chargers and wiring harnesses, etc.
double and triple check your DC plug's polarity with a Voltmeter of some sort. feeding opposite polarity voltage is never good to delicate electronics.
if you're not comfortable with soldering, use good crimping tools, decent guage wiring and heat shrinks.
good luck. it's not too difficult!!
-
i'm not sure if it's a rev c or not, i know it was purchased about 1 year ago if that is any indication, i know he has the manual and everything, but i will have to ask him. thanks for the advice! +T
-
Just don't reverse the polarity, as the protection circuit in there is pretty bad and will burn up!
D
-
I'd guess it is Rev C is he got it last fall and not last summer. It will be obviosu when you look at the serial number what version it is
-
and what color is the casing?
-
Just to throw another option out there:
I'm using 9.6v RC battery packs just like many UA5 users. I get about 3 hours out of a 1600 mah battery pack. Much lighter than an SLA. I believe the directions are in the archival section.
Rusty
-
It's the volt fuse rating that isn't terribly important, not amps. As long as you're below the voltage rating, you're all set. I think I use a 15v on mine for my 6v V3 battery setup.
Check this related post for Archival Info links (http://www.taperssection.com/yabbse/index.php?board=25;action=display;threadid=10309).
As you'll see, per Apogee tech, the MMe draws around 800 mA peak, so I'd go with a 1A fuse, not 750 mA.
Check your local non-RS electronics stores for parts. I actually found my 6v SLAs at Home Depot - labelled "CAUTION: for home alarm system only". Well, sheesh...it's just an SLA, has lots of uses!
-
my rev c was in black casing... I don't think that means shit
-
No, I had a C and it was black. the first C's were black and not silver. Callery got himself a collector's item
-
tha'ts what i'm saying...C's could be silver or black, but A's are all black...so if you get a silver one, it has to be a C.
-
ahhhhhh
sorry
-
DICK!
-
i'm not sure if it's a rev c or not, i know it was purchased about 1 year ago if that is any indication, i know he has the manual and everything, but i will have to ask him. thanks for the advice! +T
it's Louies. No, not RevC. It can only work on 12v power.
It was one of the first units shipped - he was on the waiting list from sonicsense when he got it. It's been collecting dust since then (summer 02). I used it this year at High Sierra because I was not careful with my ad2k+.
Kinda embarassing, but since we're on the subject i'll share.
Hooked my battery up backwards at steve kimock - i got there late, it was dark and i was rushed.
Although the fuse in the 2k SHOULD HAVE blown, it did not. I had to send it in to get repaird, it was all covered on warranty cuz it SHOUDLA blown but didn't.
So i got it back, but i was forced to MME it for hi sierra.
word of advice: Proceed w/ caution
-
Hooked my battery up backwards
You related to Daryan? :P
-
Alright Brian, I have about had it with this burning up shit :clapping: for the coment...
D
-
Hooked my battery up backwards
You related to Daryan? :P
nope, no relation.
I'm just a stoner with bad eyesight - esp in the dark
i knew if i posted that i'd get flamed. oh well, live and learn
ian
-
Alright Brian, I have about had it with this burning up shit :clapping: for the coment...
D
I can't help it, the opening has come up sooooooo often the last few days. :lol: All in good fun, D...if it's buggin' you, I'll back off a bit. :)
-
good news, i found a place that sells all sorts of SLAs 2 mins from my apartment! awesome place, every SLA you could ever need although definitely not the cheapest, oh well. now it's time to do some soldering. any ideas on how to make a simple fuse case for the fuse so they can be replaced easily?
-
good news, i found a place that sells all sorts of SLAs 2 mins from my apartment! awesome place, every SLA you could ever need although definitely not the cheapest, oh well. now it's time to do some soldering. any ideas on how to make a simple fuse case for the fuse so they can be replaced easily?
for comparison sake, how much is a 12v 7.5ah SLA? i bought mine from a hobby shop for $20.
i've seen these in use on a regular basis.
(http://www.littelfuse.com/Products/ProdImages/155-bayonet.jpg)
(http://www.littelfuse.com/Products/ProdImages/150.jpg)
(http://www.littelfuse.com/Products/ProdImages/155-ATO.jpg)
marc
-
I was just playin :flaming: :flaming: :flaming: :flaming: :flaming: :flaming: :flaming: :flaming: :flaming: :flaming: :flaming: :flaming: :flaming: :flaming: :flaming: :flaming: :flaming: :flaming: :flaming:
D
-
FWIW, the fuse boxes shown here I think are for slow-blow, non-resettable fuses. I just wire the fast-blow, resettable radial fuses I use directly to a short wire coming off the positive terminal, and then outgoing on another wire to the battery connector. Wrap it all up securely with electrical tape, glue it to the top of the SLA, enclose the whole darn thing in a small box, doesn't much matter - you're good to go.
-
FWIW, the fuse boxes shown here I think are for slow-blow, non-resettable fuses. I just wire the fast-blow, resettable radial fuses I use directly to a short wire coming off the positive terminal, and then outgoing on another wire to the battery connector. Wrap it all up securely with electrical tape, glue it to the top of the SLA, enclose the whole darn thing in a small box, doesn't much matter - you're good to go.
you can use either slow or fast blow fuses in the holders above. these hold non-resettable fuses. once it blows, you have to replace them. i prefer non-resettable ones, personally. i'm not 100% sure, but i don't think i've seen "slow blow" ATO (very bottom pic) fuses before.
marc
-
[quote author=leegeddy link=board=25;threadid=10318;start=15#msg124537 you can use either slow or fast blow fuses in the holders above. these hold non-resettable fuses. once it blows, you have to replace them. i prefer non-resettable ones, personally. i'm not 100% sure, but i don't think i've seen "slow blow" ATO (very bottom pic) fuses before.
marc
Yeah, I think you're right, Marc. Thanks for the correction. :)
-
ouch Ian! That's rough!
-
thanks again marc. i called a bunch of places and cheapest place had a 7AH for $22, but it was 30 miles away so i decided to just shell out $28 for a 7.5AH at the place that was 1 mile away instead. it's doubt i will be buying another 12V anytime soon...hopefully.
-
Batteries Plus? When I built my own SLA's I used to get my batts from there
-
"slow blow"
haha