The very roundabout on/off switch mechanism

With a little circuit tested that latches on when the BC-250 starts and puts the server PSU into standby when it shuts down I still wanted to make the behaviour more "ATX-like" ie. you can also use the power button to ask the system to shut down.

There is a button on the faceplate of the BC-250 that can act as a shutdown or sleep switch depending on how you configure it in the OS. Sadly this isn't brought out on a header anywhere. Which means soldering directly to the PCB. I checked the BC-250 Discord and made up a little flying lead for this.

Some of the people on the Discord have been making quite complicated latching setups for doing this, some including microcontrollers, but I've opted for simple expedient use of a DPDT momentary button.

One side of the button is connected to my latching setup that turns the BC-250 on. The other side is connected to this flying lead on the BC-250 that asks it to shut down.

That's it.

Push for on, push for off.

This will also allow me to go with the decorative button switch I fancy for my case and I've designed a 3D printed mechanism that holds a brass coin and the actual switch. If I laser-engrave the coin and sink this flush in the front of the case it should look pretty snazzy.