[WIP] 17mm DD+single-7135 driver / single sided / Dual-PWM

Thanks Dale & Mike, it works now!
I’m now adjusting the R size to get desired brightness.

Apologies for bringing up an “older” thread - I am looking to build a Fet+1 17mm Attiny13 driver which is one-sided and works with common firmware (like the ones in the repository, I have all flashing tools here). Initially I was going to order the MTN-17DDm (v1.11) from MTN, but realized that international shipping for 1 PCB (which is 0.65 cent) would not be that efficient.

Is OSH Park ~ comparable with the MTN 17DD v.1.11 and would that be the current PCB version to use? Would anybody know whether that board works out?

I already own the following parts - do I need anything else? It is for a 1s configuration, so no Z1 required, I guess.
attiny13a-SSU
C1 - 10uF 10V+ 0603 or 0805
OTC: 1uF 0805
7135 (380 mA)
R1: 19.1k 0603
R2: 4.7k 0603
D1: SOD-323 Schottky

fet: PSMN0R9-25YLC (I tested this NXP fet before and it worked fine in another driver).

Thank you!

ps: I am also open to listen to other ideas, links to other boards and vendors. I have build an Oshpark board before and that all worked out.

I use this board with the exact same components you mentioned except 7135 (350mA) , and A6 firmware :

https://oshpark.com/shared_projects/dlwrGztk

Thanks, I was going to order a board with a bypass hole, if possible. But thank you for confirming that your board works (I assume you worked out all the issues you mentioned above?).

Yes , i had some problems with the Bistro and attiny25 but now everything is fine .
Made 6 drivers past month , all working great .

Have a look at this thread for the latest linear driver, it should also work with 13A but you would loose the third PWM channel.

” The Texas Avenger Driver series - FET + 1 + 6+ triple channel + Bistro + one driver for all your lights! “:Texas Avenger "TA" Driver series - Triple channel + Bistro or Narsil + Clicky or E-switch - The Ultimate open source driver!

R3 : 100 k
R4 : 47 ohm
C2 : 0.1 uF

While the TA driver is a great design it would need the above listed additional parts though.

Is it possible to leave the battery side empty (the one with the 6x7135 bank) on the TA series? actually, I might ask that on the other thread.

I would be happy to buy the Attiny25 but I don’t have the other missing parts (R3, R4 or C2 and the rest). Since I buy most of my parts directly from China it would take either too long or the item might get lost (happened before with my resistors).

Was hoping that someone has tested the V32 of the PCB (link: OSH Park ~ ) or whether it is comparable with the MTN 17DD?

Is there a reason why you want that particular version of this board? Earlier versions were very well-tested but I don’t think that one is.

The TexasAvenger board can be used with the “older” parts list, but it is limited by the firmware. Currently there’s only one solid FW that works with that board.

Richard at Mtn uses his own layout and parts on his newest designs

pilotdog68 - Since I am new to building drivers myself I thought the latest version would be the best. Apologies if that is not the case. I also checked the Oshpark projects @ BLF thread but I don’t know whether all drivers are in there (must be a ton of work to track all of that as well).

All I have is a hotplate to reflow solder the board, hence single-side only? I don’t know how to reflow a board with a hot plate / skillet and I can’t afford a SMD hot air rework station.
Can I leave the TexasAvenger driver empty on one side (the one with all the 7135 chips). I read a little bit through the details and wasn’t sure which channel goes to the FET and which one to the 1x7135.

my plan was to flash standard .hex files and not change anything (but I could try to do that too).

i have ordered the v32 board linked above and will report back after they have arrived. Unfortunately I also had to order a few parts - it will easily take 3-4 weeks to get everything and I’ll need to find time on a weekend to build/assemble. I don’t know how close this version is to the BLF 17DD driver but it is a Fet+1 I am after. haven’t ordered any FETs yet - not sure which one to go for… there are so many now.

Sir800dp is the no.1 for me.

Thank you, all. I will try to order and build it. worst thing that can happen is that I will be out of the money for the boards. But I am hopeful that they will work out.

Does attiny25 work out of the box with this board? Or should I change/add some components? Thank you!

Yes… ish.

This design is prone to voltage spikes when the amps are high, which is fine on the attiny13 but can cause spontaneous reboots on more sensitive chips like the attiny25. So, it’s recommended to keep the amps under ~4 or so, or use a newer driver design with the voltage spike issue fixed.

Thanks TK! Which single side design you would prefer? (double down is enough for me).

I usually order RMM’s drivers from MtnElectronics.com.

TA drivers have a 4.7 Ohms resistor in series with the diode and a 0.1uF cap directly on the MCU to get rid of the turbo spike problem

They look good. But shipping to germany is a little bit expensive.

Thanks Lexel, you already explained it to me in the TA thread. But you also said that there are some things todo to get it working as double down. So I searching another driver.

I found this updated version (v32): OSH Park ~

I looks like he also added the necessary resistors to fix the attiny25 problem with high currents?

Is there a diagram or schematic available for the current driver shipping in the blf A6?