My New PCB Prototypes

Show off your completed Game Boy Zero, or post your build logs here!
Dividion
Posts: 65
Joined: Fri Mar 30, 2018 5:42 am
Has thanked: 46 times
Been thanked: 55 times

Re: My New PCB Prototypes

Post by Dividion » Sat Nov 16, 2019 4:17 am

cdndavid wrote:
Fri Nov 15, 2019 11:29 pm
I'd like to use your Power assist pro (and a bunch of other of your boards) on my pi 3+ build. Does the power board put out enough amps?
Hey cdndavid,

It can run a Pi 3, but you'll get lightning bolts. From what I've seen and experienced, the voltage drops/lightning bolts can mostly be eliminated by using two batteries. (which carries the possibility that they'll charge unevenly) I suspect using a really good battery (like Helder's MegaBat viewtopic.php?t=6720) might do the trick, but I'm not sure on that. I think the resistance on the mosfet switch might be just a little higher than it should be also, and I've been tweaking the design to see if I can change that. I should have a new batch of the "Power Assist Basic" boards arriving next week, and if they work like I'm hoping, I'll probably order the production batches for all of the boards using the new design.

For now I can't really recommend it for use with a 3, unfortunately, especially if it's paired with a power-hungry composite or HDMI screen. The power drain of an SPI screen is small enough that you'd probably be okay pairing it with a 3, but you're still likely to see the lightning bolts occasionally. I'm hoping to be able to change this recommendation soon.

I've been working on updates to quite a few of the other boards also, and I've also got some new items in the testing stage that I hope to release soon, so I hope you'll stay tuned. :)
Check out my store for GBZ boards and accessories: http://pocketadventures.com

cdndavid
Posts: 2
Joined: Thu Nov 14, 2019 8:46 am

Re: My New PCB Prototypes

Post by cdndavid » Sat Nov 16, 2019 11:23 am

Dividion wrote:
Sat Nov 16, 2019 4:17 am
Hey cdndavid,

It can run a Pi 3, but you'll get lightning bolts. From what I've seen and experienced, the voltage drops/lightning bolts can mostly be eliminated by using two batteries. (which carries the possibility that they'll charge unevenly) I suspect using a really good battery (like Helder's MegaBat viewtopic.php?t=6720) might do the trick, but I'm not sure on that. I think the resistance on the mosfet switch might be just a little higher than it should be also, and I've been tweaking the design to see if I can change that. I should have a new batch of the "Power Assist Basic" boards arriving next week, and if they work like I'm hoping, I'll probably order the production batches for all of the boards using the new design.

For now I can't really recommend it for use with a 3, unfortunately, especially if it's paired with a power-hungry composite or HDMI screen. The power drain of an SPI screen is small enough that you'd probably be okay pairing it with a 3, but you're still likely to see the lightning bolts occasionally. I'm hoping to be able to change this recommendation soon.

I've been working on updates to quite a few of the other boards also, and I've also got some new items in the testing stage that I hope to release soon, so I hope you'll stay tuned. :)
got nothing but time :) Ill keep my eyes on the site and here :)

D

Post Reply

Who is online

Users browsing this forum: No registered users and 1 guest