FlexMod P3 Replacement?

[Wolfman29]

I understand that. We could put together group buys and order the PCBs?

 

[ElektroFreak]

That wouldn't be too hard really, there are websites that sell that service. Given the size of the boards it might not even be very costly. I'll look into it tonight and see what I can find..

 

[Wolfman29]

Yeah - check out OSHpark.com. That's what I use for all of my boards. $5/sq. in. in sets of three.

 

[ElektroFreak]

Might have to convert the image to some specific sort of design file, I haven't tried to order pcbs online before personally. That's a pretty trivial issue though. http://www.repairfaq.org/sam/ldartwrk.png

 

[Wolfman29]

Hell, I could do a redesign of the board, compactify it and use SMD components.

 

[ElektroFreak]

It's in that link.. doo eeet! I'd take 10 blanks right now if they were available.. There will always be a need for space for the large output resistor in series with the diode at high currents like 2-5A.

 

[hakzaw1]

FYI
lava has a GB going on for P3s
there may be some FS at SELEM his is palnned to doa LSX demo there


AND all analog IS (basically)also ttl
but ttl only is NOT analog.

btw RD tech has been working on same project for some time now
I was asked to not a say that but i give up waiting .

sorry Mitch

 

[ARG]

Hell, I could do a redesign of the board, compactify it and use SMD components.

Would be nice to keep the main regulator through hole - for easy heat sinking.

 

[Wolfman29]

Well, I think the main regulator can be put into a D2Pak, yeah?

 

[benmwv]

Id say keep it to220, so you can bolt it right on a heatsink. And definitely use the 1085!

 

[ARG]

You could use an SMD package if the board is one sided, then just bolt the PCB down onto a heatsink.

Through hole is still the better option most likely.

 

[Wolfman29]

I always prefer flat options, so if that means making it one sided, I'd be okay with that. Adding a through-hole component makes the space the board takes up SO much bigger.

 

[benmwv]

How about this, put both. Put layout for the smd one, and at the edge of the board put three holes for the through hole one. This will hardly use any more space, but allows the to220 for high power. And you can keep it two sided.

 

[Wolfman29]

You mean one-sided? One-sided is better for heatsinking!

 

[ElektroFreak]

Just picked up the chemicals for etching. My plan is to etch the board as shown in the diagrams for the purposes of testing, hope to have a working prototype by the end of the week if I can manage.

 

[Wolfman29]

Good to hear! I'll post the PCB when I get it worked out later.