[Guide] Graceful shutdown switch without Pololu [RETIRED]

[lookitsneil]

Anyone know what foot print the original DMG-01 Switch uses? Or what the spacing on the pins are?

[Camble]

Anyone know what foot print the original DMG-01 Switch uses? Or what the spacing on the pins are?

The pins are 4mm apart and there is 2.5mm between each row of pins.

This switch shares a similar footprint.

[tent]

@Camble : wouldn't it make sense to also add a "emergency reset" feature as seen in popcorn's solution in case the OS get's stuck on the pi-zero?


edit: actually I should have asked this in the other thread about "[Gauging Interest] Safe Shutdown PCB"..

cisco.

[Camble]

@tent I considered this, and mentioned it in my PCB thread, but all anyone needs to do to add an emergency reset is to solder a switch to the EN/GND pins of the PowerBoost.

It may be more convenient to have it on the Safe Shutdown board. Hmm, maybe I'll still add a couple of additional pins.

[SidSilver]

A tact button could be placed just right to the switch so you can make a tiny hole for reset. I've seen this on this forum. You can only push the reset button when the switch is off and you need a niddle to do that. This way it's secured to prevent hard shutdown by mistake

[tent]

yes true.. but I was thinking about something close to the power switch indeed.. maube a pushbutton un the pcb that could be pressed from above if there is a micro hole on the case just above it? an idea.. maybe in your pcb this could be easy as well if considering the switch position in the case?

[tent]

SidSilver preceeded me lol!

[SidSilver]

Here it is...
http://www.sudomod.com/forum/viewtopic.php?p=5779#p5779

Here's what mine looks like:

[Camble]

How about support for something like this?

[Camble]

I've found surface mount tactile buttons which would fit nicely on the board beside the power switch. Is this a feature the majority would like? A reset button nested in under the slide switch? If I'm doing this, I'll also add pins to locate a reset button anywhere in the case.

What's the general consensus?

• On-board tactile reset button (slightly longer wait time due to delivery of buttons)
• Just reset pin headers (quicker)