Raspberry Pi Hat Template

Description

I having been making assorted add ons for the Raspberry Pi for a while I am surprised that more Raspberry Pi Hats haven't been released. I think one of the main reasons is that people are sometime scared to develop on a platform that may not be as electronically robust as the Ardunio (but if you check your wires it should be just fin). The other reasons is the lack of tools that are already available. Most electrical design softwares actually come with an Ardunio shield as one of the main example files.

I think we need this for the Raspberry Pi. This project is hopefully the start of that. I want to make it easy for people to develop Hats for the Pi while also getting design feedback. So this is Rev0.1! I have used it on 4 different hats now and it has worked out great! So if you are interested fork the project on git and make something.

Check out the video below!

Files

pihat-template-master.zip

Project files @ commit 3edcb619

application/zip - 89.91 kB - 12/30/2015 at 07:20

Download

Build Instructions

Collapse

Step 1

Discussions

fhennerich wrote 08/26/2018 at 21:15

Thank you. Shouldnt the Shottkey Diode be the other way around ? https://en.wikipedia.org/wiki/Buck_converter

Are you sure? yes | no

Jonas Norling wrote 07/31/2017 at 07:08

Nice work! I don't think the power supply is needed for many projects (such as the one in the video), so having it there without explaining what it's there for may actually scare off potential hat builders. Personally I'm afraid of inductors :-)

Are you sure? yes | no

Gordon Couger wrote 03/15/2017 at 04:05

It took a while to find a descrition of using a FET or MOSFET bridge that explied why the voltage loss was nearly zero but here are two:

http://www.thetaeng.com/designIdeas/FETBridge.html

http://www.edn.com/design/analog/4368525/Use-a-self-powered-op-amp-to-create-a-low-leakage-rectifier

They need testing to be really sure they act as the write up say they do.

Another way to hanle it is to put a battery backup on the the board with Velcro mounting the battery to attached by the user so it does't interfere with any parts placement. A +/- 12 or 15 volt 2/3 amp power supply might be a good deal to add on the battery charger as an option.

Are you sure? yes | no

roachslayer wrote 01/24/2017 at 19:20

Shouldn't the terminal be on the other side of the board?

Are you sure? yes | no

Jonathan Cohen wrote 11/09/2016 at 17:13

I used the back-powering protection circuit that you have in this HAT, which is similar to the Pi HAT example specification (however a change from a P to N MOSFET) but I have too much voltage drop coming out of that circuit. Any ideas on that ?

Are you sure? yes | no

Raspberry Pi Hat Template

Become a Hackaday.io member

Just one more thing

Description

Files

pihat-template-master.zip

Build Instructions Collapse

Enjoy this project?

Discussions

Become a Hackaday.io Member

Does this project spark your interest?

Report project as inappropriate

Send message

Remove Member

Build Instructions

Collapse