Oshpark Projects

I'm struggling to follow exactly what you are trying to achieve here. There is a version of the 17DD that accounts for the zener: http://oshpark.com/shared_projects/HPnAx0qF

The BLF17DD-Z is setup for the R/Zener mod, and the input to Pin 7 via the voltage divider is directly from VIN. I'm pretty sure that's what you want, no?

Just imagine if we use the ATtiny25 in lieu of the ATtiny13…2K of programming space…imagine what the coders could do if they had that much more room…they do amazing things with 1K!

Oh wait…Tom is talking about the whole different MCU…duh

Just looking for a new set of resistor values and the board mod necessary to regain low voltage detection in a Zener modded board for 2 cells. It’s not for any project in particular but just to increase my understanding of how that part of the board works.

Edit - looked over the BLF 17DD and yes that’s exactly what I’m talking about and now just need to make sure I can pick the correct values for 2s or 3s cells.

Ah OK. Well you're on the right track. You need to cut the connection between R1 and where the diode used to be, and bridge from VIN directly to R1. Your voltage divider maths is correct as far as I can see.

Wut? I'm using a BLF17DD w/ATTiny13A.

I thought you were referring to the Zilog MCU of other builds…sorry

Ohh - Dunno what happened to Tivo - no updates - design problem on the board he was gonna look at, so I gave up on that project for now.

Hey look at PowerPeg Thermal connectors. They provide the thermal performance of MCPCBs on FR4 substrate.

Below is a link to the website, and also my shared projects.

http://tem-products.com/index.php/powpeg.html/

http://oshpark.com/profiles/TEMdude

I’ve done a board like that. Via under the led’s thermal pad meant to have a small section of copper wire inserted.

I knew I recognized your NIC from somewhere :slight_smile:

P.S. you camping companion PCB any more info??

It was a solar powered battery charger, with a small LED flashlight, and a buzzer. The PCB was a spindle to wrap fishing line around.

I couldn’t get enough power from solar panel to charge the battery though, so I deleted the project.

Aw man…ever thought of using one of those .9-4vdc~ booster circuits then feeding into a TP4056 charge controller set for 100~mA charge?

Got pics of it? Would really like something like this to tinker with…I built a few joule thief jobbies as well

Booster circuits require power to operate, which would drastically lower the ‘effective’ efficiency of the solar cell. I was going for a charging system which practically pipes power directly from the cell to the battery. However, the project was pretty much a complete failure. Haha. I don’t have pictures.

Pictures of my projects are here:

Imgur

I found myself creating a DD Roche F6 driver. I didn’t really intend to, just happened. :~

I’m hoping my board gives clearance for a attiny programing clip. Anyone know what the minimum clearance would be? I don’t actually use those clips myself.

Probably won’t use this DD Roche F6 driver myself. I haven’t got into pure DD myself yet. Also don’t even have an Roche F6 yet. :smiley:

So what kind of clips do you use? Sounds like you’re sayin’ you want to buy a roach clip… naughty boy… :party:

It’s pretty tight…I know the original build of the BLF SRK the R2 was just a smidge closer than R1 and it interfered with getting the clip on

The 7135 Based SRK Driver V1.1 ?
So v1.1 is ok but v1 was a smidge too close?

Clips, a gentleman doesn’t comment publicly on such things. :face_with_monocle:

Would a switch like this work on your build?
http://www.digikey.com/product-detail/en/GP11MSV1BE/CKN9059TR-ND/1014127

have you found the verticle surface mount switch for your build?
nope…you need a SMD tactile switch (preferably with gull mount for strenght)
Like this
http://www.digikey.com/product-detail/en/TL4100AF240QG/EG4964CT-ND/2685042

Never mind comfy already found the parts
http://www.digikey.com/product-detail/en/TL3330AF260QG/EG4389CT-ND/1426859

Yes… V1.1 added retaining tabs and moved the resistor over

What is the digikey part # for the Zener diode on the 20 mm Zener Mod Linear Led driver

SOD-323??

http://oshpark.com/shared_projects/H7WGuYpM

This?
http://www.digikey.com/product-detail/en/BAT43WS-7-F/BAT43WS-FDITR-ND/717698