[Pre-Order] Safe Shutdown Switch (PowerBoost Version) - Closed

Completed sale threads will be moved here to keep things tidy in the main For Sale forum.
User avatar
Camble
Posts: 882
Joined: Thu May 05, 2016 2:31 am
Location: Scotland
Has thanked: 269 times
Been thanked: 487 times

Re: [Pre-Order] Safe Shutdown Switch (PowerBoost Version)

Post by Camble » Tue Aug 23, 2016 3:28 pm

@Mischief Don't worry, that pic is just for illustration. The board will come with no switch, or if you'd prefer, supplied with a switch.

User avatar
Mischief
Posts: 225
Joined: Sat May 21, 2016 7:50 am
Location: Wolverhampton, UK
Has thanked: 29 times
Been thanked: 68 times

Re: [Pre-Order] Safe Shutdown Switch (PowerBoost Version)

Post by Mischief » Tue Aug 23, 2016 3:33 pm

Camble wrote:@Mischief Don't worry, that pic is just for illustration. The board will come with no switch, or if you'd prefer, supplied with a switch.
No need for a switch just making sure I could hook it up to the DMG switch :D


Edit: Order placed ;)

KaiKona808
Posts: 51
Joined: Sat Aug 06, 2016 6:30 am
Has thanked: 20 times
Been thanked: 14 times

Re: [Pre-Order] Safe Shutdown Switch (PowerBoost Version)

Post by KaiKona808 » Tue Aug 23, 2016 6:16 pm

Ordered!

@Camble this is amazing! Thanks for making this happen. This project just keeps getting more and more interesting.

User avatar
Evilz
Posts: 27
Joined: Sun Jul 17, 2016 1:24 am
Has thanked: 5 times
Been thanked: 1 time

Re: [Pre-Order] Safe Shutdown Switch (PowerBoost Version)

Post by Evilz » Tue Aug 23, 2016 11:33 pm

Must disay on thé new market ;)

warrell
Posts: 7
Joined: Wed Aug 24, 2016 3:43 am
Been thanked: 5 times

Re: [Pre-Order] Safe Shutdown Switch (PowerBoost Version)

Post by warrell » Wed Aug 24, 2016 3:48 am

Orders

User avatar
keilun
Posts: 6
Joined: Thu Aug 04, 2016 7:23 am
Has thanked: 5 times

Re: [Pre-Order] Safe Shutdown Switch (PowerBoost Version)

Post by keilun » Wed Aug 24, 2016 9:40 am

How do you handle, script-wise, the low battery?
With my very limited electronic knowledge I can guess:

- LBO pin is pulled high to the VBAT on the powerboost when battery is not low so you connected it to the keepalive that is also high
- Low Battery RPI pin is also highas I see it connected to R1
- When LBO is dropped to 0 (battery level below 3.2v) what happens to the keepalive? My guess is that is pulled low. If that's the case then the low battery pin on the RPI is also pulled low, which we should be monitoring but it cannot work with Popcorn's version...

I see also that you have an R2 resistor to limit current from the LBO pin (mandatory as Vbat can go up to 4.2v which will damage the Pi), but I see also something that seems a diode on the 3.3V and that's when I think I get confused...

TechnoMario
Posts: 14
Joined: Thu Jun 16, 2016 7:07 pm
Been thanked: 2 times

Re: [Pre-Order] Safe Shutdown Switch (PowerBoost Version)

Post by TechnoMario » Wed Aug 24, 2016 9:41 am

Ordered!

User avatar
Camble
Posts: 882
Joined: Thu May 05, 2016 2:31 am
Location: Scotland
Has thanked: 269 times
Been thanked: 487 times

Re: [Pre-Order] Safe Shutdown Switch (PowerBoost Version)

Post by Camble » Wed Aug 24, 2016 9:45 am

keilun wrote:How do you handle, script-wise, the low battery?
With my very limited electronic knowledge I can guess:

- LBO pin is pulled high to the VBAT on the powerboost when battery is not low so you connected it to the keepalive that is also high
- Low Battery RPI pin is also highas I see it connected to R1
- When LBO is dropped to 0 (battery level below 3.2v) what happens to the keepalive? My guess is that is pulled low. If that's the case then the low battery pin on the RPI is also pulled low, which we should be monitoring but it cannot work with Popcorn's version...

I see also that you have an R2 resistor to limit current from the LBO pin (mandatory as Vbat can go up to 4.2v which will damage the Pi), but I see also something that seems a diode on the 3.3V and that's when I think I get confused...
LBO does not connect to keep alive. These are effectively two separate circuits. You wire the LBO pin to the PowerBoost LBO pin, and the low-batt pin to a free GPIO pin on the Raspberry Pi. This pin will be set with an internal pull-down, so when a high signal is detected, you can execute some code. For example, @Popcorn's Power Monitor throws up a 60 second count-down then shuts the Pi down.

Note: There is a mistake on the pin markings in the second photograph, the low-batt and keep-on pins are swapped. This has since been corrected.

User avatar
keilun
Posts: 6
Joined: Thu Aug 04, 2016 7:23 am
Has thanked: 5 times

Re: [Pre-Order] Safe Shutdown Switch (PowerBoost Version)

Post by keilun » Wed Aug 24, 2016 1:23 pm

Thanks a lot, it makes much more sense now ;)

User avatar
Boogz
Posts: 16
Joined: Tue Aug 09, 2016 8:01 am
Has thanked: 5 times
Been thanked: 8 times

Re: [Pre-Order] Safe Shutdown Switch (PowerBoost Version)

Post by Boogz » Wed Aug 24, 2016 3:00 pm

Ordered.

Any ball park date/time they'll be put together for Shipping? If not that's cool. I'm just anxious to get my hands on one ;)

Post Reply

Who is online

Users browsing this forum: No registered users and 1 guest