Home Switch Problem

[john swift]

Hi Kev

I'm not sure what to recomend

I was going to recomend CNC4PC's C10 breakout board
but looking at their web site they have changed the construction

the versions I had seen had the IC's in sockets
making it easy to repair if something went wrong


the latest version is like this


this chinese BOB others have had problems with
I have reverse engineered to find out why it didn't work as I expected
it turns out that the 74hc14 IC used to buffer the inputs doesn't have the supply pin connected !!!!


in a quick web search this is the closest to your BOB I have found ( may need an extra power supply)


boards like this with opto isolated outputs are not ideal when the stepper drivers have opto isolated inputs


breakout boards with LED indicators on the inputs could be an advantage
at least you can see when the switch is operated

low cost chinese board with LED input indicators


John
PS

from Australia
this MB02 from Homann Designs is a possible alternative to CNC4PC's C10