Magic Shine Headlight, DIY battery pack

LI-ghtcycle

LI-ghtcycle

10 MW
Joined
Aug 29, 2009
Messages
3,818
Location
Oregon City Oregon
I found this link where I can buy just the light head it's self.....

http://www.geomangear.com/index.php?main_page=product_info&cPath=4_41&products_id=143


so now I am wondering how much voltage I can safely put to the light?

I see that the battery pack it comes with is around 8.4V (that is the rating on the charger anyway) so I'm wondering if I series some of my konions will 11.1V be too much? (3.7V x 3)

Or even my full 18v pack?

I'm very curious since I see this is the closest thing to a redi-made cree light system that should be very simple for me to rig up. :)

Thanks!
 
Hi mate I can't answer your question....but where can I buy the magicshine lamp only without batteries, I did skim through that thread but didn't see it.

Cheers.
 
Ok, kewl! Thanks for the info Ken. :)
 
Hi LI-ghtcycle, did you manage to run your MagicShine OK on 12V? I've just bought one and keen to do the same, but saw some advice suggesting it could be bad (see post #7). I've measured mine up and it's drawing 10W (1.3A @ 7.8V), not sure how much of that the driver is dissipating.
 
Somewhat related, would it be possible to simply draw from the charging plug from the 36V battery that powers my motor? I'd need to figure out how to reduce the voltage though, right?
 
When I was looking for a lighting solution this seemed the best deal to me: http://www.dealextreme.com/details.dx/sku.19189

Takes a separate battery which some may find inconvenient, but that also means you can use it as a general purpose flashlight. Also, probably not actually 900 lumen, so if Magic Shine is actually 900 lumen you wouldn't have quite as much light. I find it plenty good for spotting potholes at 28mph though.
 
search ebay for "eee pc 901 power supply". They are switching power supply that provide 12v 3A which should suffice. Provide a nice 12v unlike some transformer style wall adapter that sometime out put 16v even though it said 12v.

Used to sell a smaller portable version too which i have. Can't find that anymore though.
 
I have ample battery suply so I ran 48v to a 12v converter. From there i made a 12v power strip. I've powered a headlight, tailight, and cigarette lighter for charging stuff. I'm planning on using the 12v for a motorcycle stereo. No more aa and aaa batteries! A sense of freedom. The worst part about aa and aaa"s is they burn out right when you need them and the spares are at home. Run 12v for obvious reasons.

ebent
 
I found some 8.4V 2A power supplies, for Canon cameras if I remember correctly... $10 each.

That said, does it make sense to be putting DC current through an AC-to-DC power supply? My understanding of electricity is still quite young...
 
drewdiller said:
I found some 8.4V 2A power supplies, for Canon cameras if I remember correctly... $10 each.

That said, does it make sense to be putting DC current through an AC-to-DC power supply? My understanding of electricity is still quite young...
Click to expand...

I think it would depend on if it was dropping the voltage on the AC side through say a transformer or if it just rectifies the AC to DC and then drops the voltage. Better to go with a true known dc/dc. I'd think at first glance hte one drewdiller referenced would work if it fit the pack voltage.. Actually if I look at the spec sheet it says it takes 18 - 75? They do have a 9 to 36v ranged one too which might work better especially if I drop down a bit. Course the spec sheets don't show an 8.4 v output.. only 3.3, 5, 12 or 15..
 
Justin at ebikes.ca has made his new Cycle Lumenator capable of handling 15-100V AC OR DC!

Pretty amazing. Does anyone know how he pulled that off?

Ambrose
 
evblazer, can you link me to the spec sheet you're looking at? I might have temporary blindness, I don't see it...
 
drewdiller said:
evblazer, can you link me to the spec sheet you're looking at? I might have temporary blindness, I don't see it...
Click to expand...
I just clicked on the datasheet link on the digikey part you linked which may not be right. The part# has an L on the end the spec sheet doesn't have one so hopefully digikeys details are right but then do the voltage input ranges stand from the spec sheet. :?
http://www.powerconversion.com/assets/aee01_and_02_1191267461.pdf

edit: went to emerson direct.. perhaps this is the proper spec sheet? Shows an 8v with that model number I think
http://www.powerconversion.com/assets/aee00_12v_ds_1191267368.pdf
 
drewdiller said:
Sorry, I was thinking of something else. Mental fart!
Click to expand...

But the emerson sheet seems to show something that would work or am I missing something?
 
evblazer said:
But the emerson sheet seems to show something that would work or am I missing something?
Click to expand...

I'll clarify, I thought you had access to a spec sheet from MagicShine. I was being a moron.

I'd buy what I linked to, but since they're out of stock, they need a minimum quantity, and I don't want to spend $200 when I'm trying to save money =)

Got my eye on this one, for the above reason... it might work in my case:
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=296-20285-ND
 
Hey guys, been sick as a dog, sorry to miss PM's, I ran my light fine on 12V (so far, only used it 2-3 times) but just make sure your remember that even though this ISN'T a huge amount of power to run, it IS too much for anything smaller than the wiring the light comes with.

I forgot this "minor detail :roll: " when I ran mine through a 22 gauge wired electric scooter switch assembly. I had originally planned on having the scooter switch turn on the light via a larger gauge solenoid switch. Instead I ended up in the dark at about 5AM in front of some poor guys house wondering why my 105 decibel horn was starting to go on ever so slightly and then blaring full blast accompanied by "magic smoke" leaving the switch assembly! :shock: :evil: :lol:
 
I got the voltage reduction component hooked up to a capacitor tonight. It's still a little wacky, I need to get an enclosure, so I won't have ride pictures until tomorrow night.

All I can say right now is that one of these lights is great, but two is awesome!
 
Btw i just searched ebay for a great alternative to power these lights. Look up "travel charger eee pc 700" It provide 9.5v at 2.3A. so should work well with these lights and our bike battery pack. I'm going to try this out. Much safer than my current setup of 12v 3A power supply.
 
ngocthach1130 said:
Btw i just searched ebay for a great alternative to power these lights. Look up "travel charger eee pc 700" It provide 9.5v at 2.3A. so should work well with these lights and our bike battery pack. I'm going to try this out. Much safer than my current setup of 12v 3A power supply.
Click to expand...
Wouldn't those want to take AC current though? That was my first mistake.
 
Just for fun, took a pic of my bike sitting with the charger. Can't tell, but I successfully put together a simple reduction circuit and the big lights are feeding from my 36V 10Ah battery instead of the small battery the MagicShines usually come with.
IMG_4048.JPG
 
drewdiller said:
ngocthach1130 said:
Btw i just searched ebay for a great alternative to power these lights. Look up "travel charger eee pc 700" It provide 9.5v at 2.3A. so should work well with these lights and our bike battery pack. I'm going to try this out. Much safer than my current setup of 12v 3A power supply.
Click to expand...
Wouldn't those want to take AC current though? That was my first mistake.
Click to expand...

Universal input switch-mode supplies (like the one mentioned) will work quite happily off DC, because the first thing that they do is rectify the AC anyway. They normally work in the range of 90-260VAC. This means that you want at least 120VDC before they will turn on! On an electric car you can do this, but the electric bike mentioned is only 48V. It won't work.

You can get very small and light 48V-12V DC-DC converters though.
 
You must log in or register to reply here.

Similar threads

E-HP
    • Like
DIY Newb FAQ?
2
Replies
30
Views
9,615
Low-and-Slow
L
RustyKipper
36V headlights
Replies
2
Views
999
RustyKipper
RustyKipper
K
Weird BMS issue/problem
Replies
1
Views
639
ccmdr
C
2
First eBike Build - DIY Battery Pack questions!
Replies
2
Views
1,026
265chemic
2
B
Need help selecting the right battery.
Replies
8
Views
1,212
wesnewell
wesnewell
Back
Top