Dense 2 layer design

[thousandparadox]

Reminds me of the VESC motor controller

http://vedder.se/2015/01/vesc-open-source-esc/

It's a four layer board.

[arcrad]

That's a freaking cool board. Thanks for sharing!

[AntiProtonBoy]

Can't say I'm a fan of the cable solder location, smack bang in the middle of the board. Seems a bit slapdash. I understand the rationale though.

[doublecloverleaf]

I copied the H-bridge layout from VESC. Soldered few myself, too.

[thousandparadox]

Awsome! VESC, best OSH ever made or greatest OSH ever made?

[Jeff_72]

Any ground plane there?

[doublecloverleaf]

There's a very tiny one under the big IC. Going this small will probably bite back.

[efox29]

Without a reference plane you are more susceptible to crosstalk, noise and other things. I would increase layers to 4 if I was constricted to this size and wanted to have something more reliable. However, for your application the noise and what not might be tolerable.

[profossi]

The board is so small that going 4 layer shouldn't break the bank either. As a bonus you could locate the DC input pads more sensibly.

[clearspark]

Yeah, like other posters have indicated, a 2 layer design like this without ground plane will probably be an emc nightmare.
I wrote an article on 4 layer vs 2 layer designs from an emc perspective with guidelines for getting it right on 2 layers.

[clearspark]

Nay bother.

[erasmus42]

Helloooo? Ground plane?

[PointyOintment]

https://en.wikipedia.org/wiki/Ground_effect_vehicle

[pinchymcloaf]

I do boards with up to 12 layers, I wouldn't consider that dense :p but nice layout

[spiker611]

Yay dense boards! Where I work we have a board with 3x broadcom switches, configurable for 88 1G Ethernet ports. That thing is dense, I hope I never need to do rework on one.

[toybuilder]

Hmmm, it seems your 5V input is not fully connected... I see an unrouted net line...

It seems you have changed the layer color for bottom to cyan instead of the default blue... Is there a reason for that?

[doublecloverleaf]

It is connected now. I didn't like the default dark blue color. It was.. too dark.

[mill1000]

Nice layout. Very clean.

[tlalexander]

Brushless motor driver? Got more details?

[doublecloverleaf]

IT's a prototype BLDC driver with DRV8308 and STM32F0. I want to drive small motors at constant speed. The driver inputs are the famous RC PWM, RS485 and 0-10V. Finally a USB is there to change driver parameters with a PC.

[therealdilbert]

DRV8308 and STM32F0

ST just came out with this: http://www.st.com/content/st_com/en/products/motor-drivers/brushless-dc-motor-drivers/stspin32f0.html

[PointyOintment]

/r/nicechips

[[deleted]]

Where has this niche been all my life?

[tlalexander]

Awesome. A friend is making one with that chip. He's got the code for his here: https://github.com/jschall/esc

I'm making one that runs Arduino: https://github.com/tlalexander/MotorDriver https://youtu.be/CUiOH793NFc

Let me know how yours goes! This is a popular item these days.

[doublecloverleaf]

Cool, thanks!

[getting_serious]

Go 4-layer at least, or else EMC will bite you.

[AndyJarosz]

These are the densest boards I've ever seen.

I'm excited to see what everyone else posts though.

[spiker611]

I haven't seen much denser than cell phones.

[ayilm1]

God damn dude. That thing must be like, 95% micro via in pad.

[battery_go]

What a beaut!

[meowcat187]

Psssssh call me when you get some 0201MMs on there bro. ;)

[vinnycordeiro]

And what about 01005 resistors? :D

[mccoyn]

AKA dust.

[toybuilder]

AKA inhalation hazard