Oshpark Projects

[wight]

@scottyhazzard

@djozz

Talking about a 17mm DD family……

As an end user of driver boards without experience on designing board lay-outs or the ability or will to program MCU’s, but with a lot of enthousiasm for using the DD-boards….

for the small light mods I usually do, it would be really nice to have a 17mm (and 15mm) DD board with no components on the battery side (even not a few tiny resistors)

My sentiments almost exactly. I am willing to sacrifice some beauty for functionality. We are the only ones that will look at the positive terminal and see the presence or absence of chips and have an opinion. I suppose it is analogous to a woman in pretty matching underclothes- perhaps no one will see them but she knows that they are there and it makes her feel happy.

I would like to take this opportunity to thank you guys again for all the work you are doing for these projects. I only understand a fraction of what you say but I enjoy the progress you have all made and shared with all of us. Thanks.

My latest driver project can be used that way. With just an FET you can ignore all the warnings about needing a custom firmware… just pay attention to the warnings about how hard to build it will be. As I say in the thread, it should not be quite as difficult as it looks - but it’s close. It does use all 0805 sized components, so you can use what you rob from the Nanjg 105c, but since I bypass the protection diode you’ll want to use a different value for R1. Pads are available for either DPAK or LFPAK56 MOSFETs. 17mm DD+7135 — linear regulated driver w/ FET turbo As you can see, there are nothing but 7135’s on the bottom. The entire bottom of that board could just be deleted and replaced with one big BAT+ pad.

For the extra 0805 components (R1, gate resistor, gate pulldown resistor) you can just get them from Chinese eBay vendors 100x for a buck or whatever.

@Rufusbduck

I think it’s certainly likely if the lfpak56 gets a board designed around it. The only real difference is the added gate resistor. I like the singe sided idea myself with only spring and stars on the back. I think there’s room for the Zener as well but I’ll have to wait on either learning eagle or more interest in that FET. It does seem to be on ebay(UK).

Which LFPAK56 FET are you using?