Hey, there's a 15mm driver too, very interesting, what's the story?
What I think that I see is no minus-ring on the battery-side (same as the 17mm and 20mm version), and no space on the board for the FET (that makes sense because it would never fit).
Also diodes are probably not BAT54’s… those are in a 3-pin package. I usually use BAT54’s since a) I have a few thousand of them b) if you buy the right version, you don’t put them in backwards c) they are easier to hand solder than some of those tiny buggers. In a pinch, you can usually slip a 2 pin diode onto the BAT54 footprint…
I see, I looked up that little FET (0.37 euro at a local website, I bet it can be had cheaper), it has an internal resistance of 0.045 ohm, that would give a voltage drop of 0.1V at 2A (if I remember Ohm's law well ;-) ).
Sorry Matt, I was rushing a bit this morning myself and didn’t look them over before copying the links from Oshpark. I’ll mark them in the op as not ready for prime time until they are.
The diodes on the FET boards are the stock off the Nanjg boards, I had to special order the ones you have on your 20mm I built TexasPyro…but it worked like a charm though
(DIY’ers can’t be choosers )
It was my fault the 17mm board got pushed…we hadn’t reviewed it…my apologies to you Mattaus. I already ordered 3x of em…so that is my penance for rushing you.
So that last SRK board with the FET looks rather awesome. I just can't keep up with all that is going on in the world of drivers. I'll just wait until RMM stocks them :)
Make sure you mention his uses a Zilog MCU not an ATtiny13A
It has 8k flash, but needs a special programmer…but I tell you, his turbo my using those FETS! WHOAH!
OK I've changed the 15, 17 and 20 Direct Drive drivers. You'll need new links though. They are all under my OSHPark profile.
Darn, I think I ordered before you changed. Do you know if I have to request a cancellation from OSH Park? Hoping they know to use your latest version.
EDIT: I created Support Tickets asking them to substitute the changed designs for my orders. If that doesn't work, I imagine I might be able to rig a ground connection on the boards.