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Spyder
(@spyder)
Prominent Member
Joined: 1 year ago
Posts: 832
2020-04-20 2:38 pm  

This isn't any kind of breakthru or anything ground-breaking. It's just something I found to be useful when dealing with RPi HATs

For lack of a better term, I'm calling the UnderHAT

What it is is a simple RPi breakout board that I soldered the oversized thru hole pins into the 40 pin GPIO, and then soldered a few other bent pins onto other useful pins so that you can attach a HAT on top of it, and still be able to connect things without having to remove the HAT that sits on top

There are 2 3.3v male pins, 2 5v male pins, a set of 5 i2c pins, and then both male and female ground pins, all accessible from the side to avoid having to disturb any HAT that might be sitting on top of it

I can only assume that I'm not the first one to think of this, but, I haven't seen one posted yet, so I figured I would

underhat

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codecage
(@codecage)
Member Admin
Joined: 1 year ago
Posts: 740
2020-04-20 5:02 pm  

@spyder

Cool!  How about a pic of the other side of the board?

SteveG


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Spyder
(@spyder)
Prominent Member
Joined: 1 year ago
Posts: 832
2020-04-20 5:19 pm  

@codecage

Not much there. Just traces. And they look like the same ones as the top of the board, but, from the bottom you can see where some of the other GPIO pins get carried off to. Lots of possibilities if you wanted to actually do something with it. It was just more handy for me at the time to use it as an expander

underhat2

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codecage
(@codecage)
Member Admin
Joined: 1 year ago
Posts: 740
2020-04-20 6:58 pm  

Did you make the board or is it commonly available?

SteveG


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Spyder
(@spyder)
Prominent Member
Joined: 1 year ago
Posts: 832
2020-04-20 9:35 pm  

@codecage

I bought just the board, then all I did was add the pins (if you do this, don't forget to buy some stacking pins, they're the extra long type) and a couple pieces of wire

I still have the box... it says http://www.electronics-salon.com/ , which, after checking, seems to be under a new website, called czh-labs.com, which, from the email contact, I would bet, is in China

Obviously, I bought them a long time ago


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