Separate Fuse Hat?

[SeoulBigChris]

I'm curious if anyone knows of a companion hat that just contains fuses for signals being switched by the relay? Such a PCB would really have no electrical connection to the Raspberry Pi, being in the hat form factor would only be a convenience. Although, such a board could sense whether a fuse was intact or blown and report that back to the control program on the Pi.

I have an application in mind for one or two of the 8-relay I/O boards to multiplex some signals into a bench multimeter. These will be high impedance, low current signals, but from things that can source high current -- like a battery, for example. If the software goes crazy, it could happen that some random combination of relay closures might short a battery to ground, for example. This is why I'm interested in fuses.

 

[sequent]

We do not have such a HAT, and it's first time we hear about it.
What we contemplated before was a smart relay board, where we would fuse the relay contacts and report when a fuse is blown. But this would work only for a predetermined current, so would have a limited application.
For now we will postpone.

 

[SeoulBigChris]

Noted. I saw a previous discussion with SMS about this topic in March on the forums here, but that was specifically about fusing on-board the relay module itself. Anyway, I will have a try at just making my own hat. As for the value of the fuses, I was planning on using removable ATC automotive fuses at 0.5 A, but of course other sizes would be possible depending on the application.