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Old 06-01-2014, 12:04 AM #1
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Default OPEN SOURCE: "CC-Boost" - 2.4 Amp boost driver - RC1

OPEN SOURCE: CC-Boost RC1:

For the current RC1 version of this driver, see post #133 here:
OPEN SOURCE: "CC-Boost" - 2.4 Amp boost driver - RC1




-----------------------------------
PREVIOUS (outdated) OP CONTENT BELOW
-----------------------------------
This arises out of a thread that was started here:
OPEN Source: Tiny, high-current, boost driver (that is starting to work).
To keep things clean, and avoid confusion based on some of the earlier discussions, it's new thread time. This boost driver is tested and working. It boosts to 2.4A from a single li-ion cell, and actually runs fine for a bit without any heatsinking. It runs a 9mm diode without issue (see video). That's an 1100 mAh 18500 IMR cell in the clip.

https://www.youtube.com/watch?v=rem6...ature=youtu.be


http://laserpointerforums.com/attach...1&d=1401581346

Here's what's cool about this driver:
- Tiny, the smallest version right now is 10 x 10 mm. That's a smaller footprint than a flexdrive.
- Inexpensive. The parts are under $5.
- Minimal part count. 2 ICs, 2 caps, 3 resistors, and an inductor.
- It can do 2.4A without issue.
- Oh, and it's Open Source

I've attached Eagle schematics and board designs for two versions, a 12x12 and a 10x10 board. I prefer the 12x12 because it's easier to reflow.

These are released to the world. I'm not making or selling any of these, I'm just sharing the design. If you want to say thanks, you can donate BTC, but it's not necessary:
Bitcoin Address: 1JLVnAaLpM4kqsJj639adgghpRnspzHDnL

10 x 10mm version (OBV8)


12 x 12mm version (OBV7)


Some housekeeping matters - somebody should scope these. Wolfman has mentioned using the ZXCT1009 and having concerns about startup overshoot. Somebody should confirm that the same issue doesn't arise with this driver.
Attached Thumbnails
OPEN SOURCE: "CC-Boost" - 2.4 Amp boost driver - RC1-obv7.png   OPEN SOURCE: "CC-Boost" - 2.4 Amp boost driver - RC1-obv8.png   OPEN SOURCE: "CC-Boost" - 2.4 Amp boost driver - RC1-small.png  


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SAFETY & IMPORTANT READING (threads authored and contributed to by various members of LPF):
- Federal Aviation Administration - Laser Safety Initiative (link)
- Info release from Laserglow - Default Canadian restrictions on portable lasers (link)
- The Necessity of Safety Goggles (link)


Last edited by rhd; 10-09-2014 at 03:25 AM.
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Old 06-01-2014, 12:28 AM #2
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Default Re: OPEN SOURCE: New Boost Drive, 2.4A capable from one cell, tested and working

rhd,is this the same driver you sent to me? I didn't think it was because that driver didn't conduct until it had an input of ~9 VDC. If it is, I am concerned with the lack of conduction at 4 VDC. If not, excuse my question.
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Old 06-01-2014, 12:33 AM #3
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Default Re: OPEN SOURCE: New Boost Drive, 2.4A capable from one cell, tested and working

Quote:
Originally Posted by paul1598419 View Post
rhd,is this the same driver you sent to me? I didn't think it was because that driver didn't conduct until it had an input of ~9 VDC. If it is, I am concerned with the lack of conduction at 4 VDC. If not, excuse my question.
I sent you a buck driver for testing. Much different driver. It was perhaps 4x the sq mm footprint of this guy (maybe more!)
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Old 06-01-2014, 01:25 AM #4
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Default Re: OPEN SOURCE: New Boost Drive, 2.4A capable from one cell, tested and working

Yeah, that's what I thought after looking at it again. The two ICs kind of gave it away, too. Is your boost driver working out to be all that you were hoping for?
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Old 06-01-2014, 01:28 AM #5
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Default Re: OPEN SOURCE: New Boost Drive, 2.4A capable from one cell, tested and working

Quote:
Originally Posted by rhd View Post
Some housekeeping matters - somebody should scope these. Wolfman has mentioned using the ZXCT1009 and having concerns about startup overshoot. Somebody should confirm that the same issue doesn't arise with this driver.
If you've got a blank PCB you could send me I can get it scoped quickly
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Old 06-01-2014, 01:30 AM #6
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Default Re: OPEN SOURCE: New Boost Drive, 2.4A capable from one cell, tested and working

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Originally Posted by ARG View Post
If you've got a blank PCB you could send me I can get it scoped quickly
How about I just send you a working driver? PM me your address, and I'll pop it in the mail
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Old 06-01-2014, 01:35 AM #7
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Default Re: OPEN SOURCE: New Boost Drive, 2.4A capable from one cell, tested and working

WOW thats tiny. Thanks for another awesome community contribution, RHD! I would rep you if i could

I wish I could order the parts and make one or two, but i don't own or have access to a reflow station I would happily rather put together drivers for 5-6$ than pay 20-30$ for the equivalent of the same thing from that certain person who makes drivers...and sands off the name on the IC's so no one can make it themselves...

EDIT: so if you want to make a few, i would happily buy them!

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Old 06-01-2014, 01:40 AM #8
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Default Re: OPEN SOURCE: New Boost Drive, 2.4A capable from one cell, tested and working

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How about I just send you a working driver? PM me your address, and I'll pop it in the mail
Sounds good to me! Saves me from doing a digikey order, thanks!
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Old 06-01-2014, 01:43 AM #9
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Default Re: OPEN SOURCE: New Boost Drive, 2.4A capable from one cell, tested and working

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Sounds good to me! Saves me from doing a digikey order, thanks!
On its way!
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Old 06-01-2014, 02:35 AM #10
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Default Re: OPEN SOURCE: New Boost Drive, 2.4A capable from one cell, tested and working

one of the vets that can make these should and sell them for 9-10 bucks a pop and make a fortune.. be nice to find some small drivers 1-500 mw for reds -1-1w for green and blue in that price range and would not kill the bank. Nice driver though be a while before i can start buying parts again (sigh) have a interview on wends but if it less than I made farming i dont think i can take it because of the commute any enough with that thanks for the contribution to the LPF
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Old 06-01-2014, 02:55 AM #11
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Default Re: OPEN SOURCE: New Boost Drive, 2.4A capable from one cell, tested and working

rhd, awesome work. +1

If someone could make a batch (50-100) of these and sell these for $8-9 while giving some $$ to rhd for each driver sold, that would work out for all of us.

I'm excited to see the test results.
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Old 06-01-2014, 03:15 AM #12
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Default Re: OPEN SOURCE: New Boost Drive, 2.4A capable from one cell, tested and working

Actually, i will extend my offer- if anyone is planning on making a few of these, i would like to buy a few. Just cant justify spending the money on a rework station just for drivers for myself.
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Old 06-01-2014, 03:29 AM #13
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Default Re: OPEN SOURCE: New Boost Drive, 2.4A capable from one cell, tested and working

I just finished finals, so if there is enough demand I can do a quick batch of 100.
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Old 06-01-2014, 03:42 AM #14
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Default Re: OPEN SOURCE: New Boost Drive, 2.4A capable from one cell, tested and working

Quote:
Originally Posted by ryansoh3 View Post
If someone could make a batch (50-100) of these and sell these for $8-9 while giving some $$ to rhd for each driver sold, that would work out for all of us.

I'm excited to see the test results.
Me too. And no money needed. I'm happy just to have a bitcoin address in this thread for donations, and if nothing ever comes in, I'm cool with that too.

Quote:
Originally Posted by crazyspaz View Post
Actually, i will extend my offer- if anyone is planning on making a few of these, i would like to buy a few. Just cant justify spending the money on a rework station just for drivers for myself.
You don't need a rework station. Toaster oven works

Quote:
Originally Posted by ARG View Post
I just finished finals, so if there is enough demand I can do a quick batch of 100.
I'd count on the fact that a couple more revisions may be needed. I took the design as far as I could without a scope, but there may be need for tweaking based on what ARG finds out through scoping. If the scoping reveals anything undesirable, we can all brainstorm on a fix
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Last edited by rhd; 06-01-2014 at 03:43 AM.
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Old 06-01-2014, 03:51 AM #15
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Default Re: OPEN SOURCE: New Boost Drive, 2.4A capable from one cell, tested and working

i would ask for two if price was ten a piece
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Old 06-01-2014, 03:59 AM #16
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Default Re: OPEN SOURCE: New Boost Drive, 2.4A capable from one cell, tested and working

How much would one cost?
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