Presale: The Ben Boost

[Mohrenberg]

Awesome!

BTW - I'm curious - wouldn't it be way easier to reflow on all the inductors first, and then do the component side last?

I figured the inductors would be best last. I know these tiny components won't fall off hanging upside down as the surface tension of the melted solder is strong enough to hold them into place.

I was worried if I did the inductors first, when I went to reflow he small components with the inductors hanging, they would fall right off when the solder fellows.

 

[Mohrenberg]

Though thinking of it now you're right, as I could just set them on the inductors instead of balancing them in the air by their tabs.
Hindsight is a dirty whore.

 

[tsteele93]

Though thinking of it now you're right, as I could just set them on the inductors instead of balancing them in the air by their tabs.
Hindsight is a dirty whore.

What I find even more annoying is when another person's foresight is equivalent to my hindsight. It suRe seem's like tHere is one in every crowD. :na:

 

[Ghostchrome]

Got the "busy" side finished on all the drivers today. I think I fried my brain with the boring repetitive motions of assembling these. As i prepped all 2,300 pads with solder paste using a 24 gauge iv catheter, and place all 800 components with tweezer.

I just have to place the inductors tomorrow and i'll be ready to start packaging orders.

rhd, I didn't get a chance to test the 1.8 today. I'll see if I can get to it pretty soon and post a video of what i get.
I'll try the regular boards, and the round boards and see if there is a difference in the run times before they shut themselves off

You're an animal, dude.

 

[Mohrenberg]

So far, every 1.25A driver reaches thermal protection in like 4 seconds. I have yet to test any WITH a heatsink though.
All of the 950 and below have all tested out great though.

 

[cilegray]

If thermal protection still kicks in alot after sinking... Is there any way to change the 1.25a in my order to something else if you have time to test em out before my stuff ships?

 

[benmwv]

When I make these I do the tiny component side first, then I solder the inductors by hand. If you just put a dab of solder paste on each pad then set the inductor on and touch it with the iron it solders pretty easily. I haven't tried that shorter square inductor yet though, all mine had the taller round one so it might not work the same.

 

[Mohrenberg]

Once I get these tested , I am going to sink one and see if it works fine after that.

 

[Mohrenberg]

So far I've got through 9 of the 1.25 ones, every one does the same thing.

On the bright side, if heatsink works on one it will probably work on the others.

Another bright side, every single other driver has worked perfectly.

....I did manage to kill one on accident. Something poked me and I jumped and end up shorting the driver's outpus while powered, now it only reads 98mA instead of 850.

 

[Mohrenberg]

I tested one out. When heat sinked, the thermal protection kicks in around 1 minute and 20 seconds

 

[daguin]

So far, every 1.25A driver reaches thermal protection in like 4 seconds. I have yet to test any WITH a heatsink though.
All of the 950 and below have all tested out great though.

I guess I'll need to figure out what needs to be done to reduce the output on mine

Peace,
dave

 

[Mohrenberg]

I'm gonna go through emails and.confirm with anyone who got over 1A if they want to xhange or not. I'm also going to limit these to 950mA and under in the future. I don't want to be flooded with ons because their laser keeps flickering and going dim

 

[Mohrenberg]

I'm going to offer to change the outputs on this batch for those that got the higher outputs.

 

[daguin]

That takes care of that problem

Peace,
dave

 

[Mohrenberg]

It'll be through email.

I'm going to go through the list of orders and send e-mails to anyone who ordered a boost driver over 1A.

I've got about 30 of them sitting here

It won't be too bad though, I'm just going to swipe my iron across the resistors and chuck them in the trash, then just reflow new set resistors on.

 

[Mohrenberg]

Hang with me, these drivers may be okay. I'm talking to ben via text msg.

I have been measuring the drivers, using an m140 diode and measuring across a 1Ohm resistor in series.
Ben is saying that the 1Ohm resistor is adding 1.25V to the load at 1.25A. So the driver is trying to supply 1.25A at 5.75V (assuming the diode's voltage is 4.5v)

I'll be right back with the new test, and we'll see if these driver are actually performing just fine at 1.25A with a 4.5v load.