DC to DC Multi-Purpose Voltage Converter $14.98

[docnjoj]

I just received my two and immediately put them to the test. They are way cool. I will be using one to determine the brightness of an led light vs voltage. I know some have a built in regulator but I don't think the old Cateye does. Then if it blows I can justify a Magicshine and use these to power it. The pot adjuster is very fine so you can be really accurate with the voltage setting. Thanks again Lyen.
otherDoc

[LI-ghtcycle]

Wow, very tempting, I might be buying one of these soon, too bad you don't have a larger version with a heat-sink and multiple out-puts.

[docnjoj]

I found out that the light is much brighter at 6V than at 3 volts so it's regulator must have some headroom. I gotta get more of those D/C to D/C things as I now only have one left. The first is permanently mounted to my wife's bike as the power source for her lights. Great little gadgets! Actually I could now change it out for a less versatile 6 volt charger from a wall wort! Hmmmmm. These are great test tools!
otherDoc

[neptronix]

Oh hell yeah. Just ordered 2 of these. They will power 2x 450 lumen flood lights off my battery pack.

I hope you restock at some point

[StudEbiker]

I got mine last week. I would be interested in seeing pictures of how you ran connections from the posts and how you have installed them on bikes. Did you put it in a project box, or what?? Lots of possibilities. It would be nice if the pins didn't go straight out from the back, say if they were bent @ 90 deg. angles to the side. I am tempted to try and bend them, but I don't want to frak up the converter.

[jamo96]

Haha small world. Someone else bought this from Toowoomba, Australia. Received mine today.

[thewmatusmoloki]

Thanks Lyen.

As usual, no fuss, well packaged, fast delivery.

Outstanding.

Matt.

[The Mighty Volt]

Lyen is the man. I just got a spare USB programme cable, well wrapped, fast delivery, thanks.

[GTR2EBIKE]

Just sent payment

[GCinDC]

lyen, what LED light are you using? got a link?

[Lyen]

lyen, what LED light are you using? got a link?

Hi GCinDC,

I bought two of these:

MTE SSC P7 C-Bin 900-Lumen 8-Mode LED Flashlight (1*18650)


They were the brightest at the time I bought them. I am sure there are already brighter LEDs out there as of today.

[chroot]

DAMN! Check this out. I happened curious check the MTE SSC P7 C-Bin 900-Lumen 8-Mode LED Flashlight (1*18650)'s pictures whoa so bright!

http://www.dealextreme.com/details.dx/sku.12623

[katou]

I bought 7 for use driving lights, and for little "boosters" for my personal electronics as gifts. There are times I have entertained aggressive thoughts towards my cellphone when it ran out of juice at the precisely wrong time.

Anyway, this is exactly what I was looking for about 6 months ago, except I would have been happy with set 5v, having it adjustable is like... Well, pretty good.

I hope you keep stocking these, I know that I will come up with many other uses for them. The main project I have in mind will use 4 (maybe 2?) 18650's in a little case which opens to access the voltage adjuster and the cells, and a female usb or something.

Katou

[GCinDC]

My flashlight is en-route from deal-extreme.

From the pics above, it's a bit unclear what is high voltage in and lower voltage out. Does it say on the unit, or do you have a schematic?

[Lyen]

My flashlight is en-route from deal-extreme.

From the pics above, it's a bit unclear what is high voltage in and lower voltage out. Does it say on the unit, or do you have a schematic?

You simply measure the voltage with you multi-volt meter while you twist the potentiometer‎ (variable resistors) to dial in your desire output voltage.

[wolfbartels]

I just received the Converter (13 days for delivery to Hamburg, Germany). It works fine.

Thanks, Wolf Bartels

[GCinDC]

My flashlight is en-route from deal-extreme.

Correction: My order was placed (11/8)! I just got an email (11/17) that it will be shipped soon...

[GCinDC]

Lyen, When my flashlight arrives, I'm going to try to set it up with the converter. I'm hoping to wire it off my main pack, but it's is 20s lipo, 83V hot. Do you have any suggestions?

I'm wondering if could create a wire tap for half the pack, say ~40V to power the converter/flashlight. But would the current draw be significant enough over 15-30 min and consequently imbalance the pack?

Or Is there another thread you'd suggest I post in? Thanks!

[katou]

Ordered 7 units, Nov 08, just received. Good seller. Electronics package is potted for the most part, feels pretty solid. I'm looking forward to making a portable super-usb charger for my ipod/phone/etc. out of old Moli cells. If I put 4 at 4.2v in series, that's 16.8v and I should be able to recharge using any car cigarette lighter. Now to make it pretty...

Katou

[lifepo4ever]

Lyen, When my flashlight arrives, I'm going to try to set it up with the converter. I'm hoping to wire it off my main pack, but it's is 20s lipo, 83V hot. Do you have any suggestions?

I'm wondering if could create a wire tap for half the pack, say ~40V to power the converter/flashlight. But would the current draw be significant enough over 15-30 min and consequently imbalance the pack?

Or Is there another thread you'd suggest I post in? Thanks!

i have a p7 from deal extrem and also the converter but i have the same problem like you , i want to use my 24s pack but i found that more useful to bring some more
18650 spare cells in my pocket or bag pack so i can still use my flashligth with the mounting i will maybe you use the converter for something one day maybe for my laptop for emergency charging

if you make a kind of plug you can simply unplug the controller and charge direct all kind of thing from the battery lead output so you will not unbalance you pack

[Hyena]

I'm wondering if could create a wire tap for half the pack, say ~40V to power the converter/flashlight. But would the current draw be significant enough over 15-30 min and consequently imbalance the pack?

Yes you can and yes it will pull that half of the pack down a little but it's not a problem if your bulk charging in parallel, which I'm pretty sure you are.
I actually run the accessories on my bike off one 5S parallel unit - that's the beauty of parallel charging
The only thing you have to watch is if you go for long night rides and have multiple lights hooked up (p7s draw around 2.5 amps) the current draw won't be going through your CA or watt meter and so the total ah won't be accurate.

[GCinDC]

it's not a problem if your bulk charging in parallel

hmm, bulk charging in parallel.. perhaps i'm confused...

i can parallel all the packs and balance charge 5s w/ the icharger.

or i can 'bulk charge' the entire pack in series @ 80V...

which charging method will replenish an uneven pack(s) better?

thanks!

[Hyena]

parallel all the packs and balance charge 5s w/ the icharger.

That one! If you're balance charging it'll fix it either way.
I parallel bulk charge with a single 24v meanwell without the balancing - set to 5S voltage it brings every pack up to 21v regardless of what it's been discharged to. If also means in the absence of a BMS if a cell happens to go dead you'll potentially only overcharge that one sub pack and not your whole battery.

[Amonk]

I finally got around to hooking mine up.I soldered leads to the pins on the back of the box(this seemed like the easiest solution with what I had on hand)and covered them in heat shrink tubing.I then used Anderson conectors in and out.I am running 36v in and 8.2 volts out ,and I can finally run my Magicshine lamp from the main battery on my bike Thanks Lyen this is working Great

[nhendrix]

Thanks, Lyen. Once again you save the day. Hyena got me all excited with his "Knight Rider" 12 volt light bar, found it on eBay but then I needed a dc-dc converter and here you are! I am so lucky you still have them in stock. Much appreciated!