BLF 22DD discussion thread

With request of a few fellow BLF’ers and authorization from Mattaus I took his BLD20DD and more or less expanded the ground ring, added a capacitor on star 4 (for the off time firmware) and de-stopped the VIA’s everything else is completely the way Mattaus built it

https://oshpark.com/shared_projects/D2dJbbBm

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Corrected for the correct board revision

Thank you!

Now…imagine all those UltraFire F13’s that can become powerhouses :wink:

And thank Mattaus…he is the master…I am just the “apprentice”

Love it. I’ll get a set just because, already got my need taken care of with wright’s adapter but I’ll still get a set just for having the off-time cap pad on the bench for FW testing.

I think I’ll try to add a dip switch to the cap so I don’t have to desolder to flash.

Poor Rufus can’t keep up with all the new driver builds…once a good driver is made, it’s really easy to just make them a little bigger

Ordered 3... Being untested, sure hope they do work, but seem low risk. Thanks!!

I just placed an order for this, and a couple other BLF creations. My first Oshpark order! I really should have ordered them earlier since my hot air rework station arrived today, and I don't have many things to use it with aside from reflowing some LED's.

Allright! Thats it, now you’ve gone and done it WarHawk. Now I’m gonna have to buy a hot air rework station and start putting these drivers together myself. Thanks alot.

One of us! One of us! :smiley:

Digging my heels, kicking and screaming”no, no, no!” I can be a bit obstinate at times. I have no intention of trying to put together even a small percentage of the project boards. I just wanted them all in one place and I’m vain enough to have wanted a sticky of my very own even if I did little to earn it.

By the way, is it ready to post as a beta, or what?

Ready to go boss…no change from Mattaus’s build…I just made it 22mm and added the “off time memory” capacitor pads

I’ve been making due with an iron but he made me finally buy my own the other day too. I think he’s workin for ’em.

I’m pretty good with an Iron and could probably get it done but I’m afraid it may bring forth one too many curse words.

What model of rework station did you get?

The Yihua 858D, $54 from amazon. I actually reflow the resistor / diode side on my glass cook-top then just have to iron the MCU & FET on the top.

You can hot air reflow both sides, the PCB keeps the components on the other side from getting too hot and re-melting and/or surface tension holds the components on if the solder does melt

I hot air both sides with this: ebay/stampabilities-heat-embossing-gun, about $20 - $22 from several places. Got my first BLF22DD's coming - just shipped from OSHPark today.

Thanks for the ideas, Tom E’s suggestion seems like the cheapest way, I wouldn’t have found that on my own. But I’m looking for an excuse to upgrade my soldering iron also, for a few dollars more than the Yihua 858D I’ve found a couple 2 in 1 units that seem to fit the bill.

Cereal_killer Is there any particular reason why I should go with the Yihua 858D such as build quality, etc? I’m asking because I’m sure you have researched it or got a recommendation from someone before making your choice.
$65.99 http://www.ebay.com/itm/2-IN-1-SMART-HOT-AIR-REWORK-SOLDERING-IRON-STATION-898D-/220799518801?pt=LH_DefaultDomain_0&hash=item3368ad4851

$59.96 2in1 SMD Soldering Rework Station Hot Air & Iron 852d 5tips ESD PLCC BGA for sale online | eBay

I had bad luck with a bottom dollar hot-air / iron combo unit like that. It was an 852D+ clone marked as 952D or something. After <6mon the iron stopped heating consistently. I switched to the Hakko FX-888 for my iron and haven’t looked back.

IIRC I later learned that Aoyue was a decent brand among the cheap ones. I have no personal experience and I’m a little foggy on that, so I could be wrong.

I’m using a Yihua 937D iron with several different tips that works well now but read E5 on the display intermittently and wasn’t heating well. It turns out there was a cold joint in the wand and once fixed(the last time I used my old 20w pencil) I haven’t looked back. Not sure if I’ll go with air or oven first if I go reflow at all.

There’s all kinds of embossing guns and they can be found everywhere. Sounds like a plan. I sure am not going to pay anything more than a few bucks and that sounds like a cheap way. I’ve been using my soldering gun for everything. It works, but it would probably save time with this. Of course, I would have to switch to solder paste. Frown