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Top Hat with Breadboard

Posted: Sun Jul 01, 2018 3:22 pm
by hsedidin
Can a tophat be used with a breadboard?

Re: Top Hat with Breadboard

Posted: Sun Jul 01, 2018 3:23 pm
by The Traveler
Depends on the hat, what pins it uses from the header and whether the remaining pins can be physically connected via ribbon cable or jumpers to the breadboard. So, at the least, I'd suggest you find a pinout diagram of the hat you want to use and check what pins it needs to use.

My sensor hat for example, while it leaves several GPIO available, make it hard to connect to them because of the way the sensor hat covers the RPi pin header.

Cheers.

Re: Top Hat with Breadboard

Posted: Sun Jul 01, 2018 6:15 pm
by Z80 Refugee
Does the OP mean wth the HAT fitted on the breadboard?

The problem is that the centre "gutter" on a breadboard is usually 0.3" pitch, whereas the GPIO pins onto which a HAT fits are 0.1" pitch.

It is not impossible to make an adapter which breaks out a ribbon to a breadboard (like the T-Cobbler) and retains pin strips for a HAT - maybe somebody makes one?

Re: Top Hat with Breadboard

Posted: Sun Jul 01, 2018 7:56 pm
by The Traveler
Does the OP mean wth the HAT fitted on the breadboard?
I didn't interpret it that way. However, one could use a breadboard as a "patch panel" and jumper from an RPi to the board, then jumper from the board to the hat in question. Might work for using a hat with an RPi it normally wouldn't fit (considering all electrical parameters are met between the two or perhaps some ad hoc interfacing electronics on the board to make it compatible).

Cheers.

Re: Top Hat with Breadboard

Posted: Mon Jul 02, 2018 11:12 am
by alphanumeric
I've used these proto hats in a few of my projects, https://www.adafruit.com/product/2310 Technically not a HAT as I use the no eprom version, but anyway. ;)
Pimoroni have a Pi Zero sized version, https://shop.pimoroni.com/products/protozero I've used a few of those too.
If you use a stacking header you can put the proto hat between your Pi and Hat. Or stack more than one proto hat etc. They make GPIO Pin access relatively easy IMHO. And they have the mounting holes for stand offs.

Re: Top Hat with Breadboard

Posted: Mon Jul 02, 2018 11:33 am
by alphanumeric
Yeah, the OP's first post is open to a lot of interpretation.
There are breakout boards to connect the Pi's GPIO to a solderless bread board, https://www.adafruit.com/?q=cobb
And I've plugged breakout boards to solderless bread boards using male headers on the breakout board.
I have never tried to connect a hat with the dual row GPIO pins to a solderless bread board. Not sure its even possible with the layout of the pins on the bread board. The center gap it too wide? And plugging in anywhere else is going to short out the GPIO pins.

Re: Top Hat with Breadboard

Posted: Tue Jul 03, 2018 12:33 pm
by TonyD
Here's an example of a pHAT and Breadboard combo I designed some time ago, if that's the sort of thing the OP is asking about:

https://www.tindie.com/products/DTronix ... -on-board/