Hackberry-Pi_Zero – A handheld Linux terminal using Raspberry Pi Zero 2W

Post by outworlder » Sat, Aug 03, 2024, 4:40 AM UTC

johnklos wrote: post #67

teraflop wrote: post #46

This looks like a pretty cool device! However, I was immediately curious about how the "dual battery" feature works. The IP5306 power-management IC seems to be designed only for a single battery, and as far as I can tell from the schematic[1], the two battery connectors are just directly connected to each other in parallel (across VBAT and GND). This seems really sketchy. If you plug in two batteries that are not at…

I read this part: > Replace your battery in 10 seconds without killing the power! as a suggestion that you'd have four batteries total, and you'd have two that're fully charged, and you'd replace one battery, and within seconds you'd replace the other. Or at least that's how I'd do it. I've recently read up about power management and battery charging, and want to make a charge controller than can connect two separate…

Post by ethagnawl » Sat, Aug 03, 2024, 5:17 AM UTC

password4321 wrote: post #43

IgorPartola wrote: post #39

Earlier quoted context omitted.

See I do have a use for this kind of thing, but not exactly. I have a few desktop towers and Raspberry Pi devices that sometimes due to upgrades or random acts of Zeus absolutely fail to boot up. I want some ability to connect a keyboard and a screen to these so I can see the actual boot screen. Normally for me this involves lugging the device to my office and connecting it to my office monitor and keyboard which is…

I too have this use case troubleshooting headless computers around the house. I saw an ad for https://www.aurga.com and bought one for $84. It connects to an app on my Android phone as display, keyboard, and mouse. Minor discussion 7 months ago: https://news.ycombinator.com/item?id=38609526 Long ago I bought a mini keyboard + mouse combo for input; the custom wireless USB dongle edition I have (strongly preferred ove…

Post by walterbell » Sat, Aug 03, 2024, 5:34 AM UTC

IgorPartola wrote: post #118

shepherdjerred wrote: post #49

Earlier quoted context omitted.

I have this exact same problem. I wonder how they solve this issue in datacenters and if that solution could apply to the home setting.

From what I understand, KVM setup is what is used. In the olden days it used to be a keyboard and monitor in every rack with a switch to connect to all the machines in the rack. Nowadays I’m sure it is more software than hardware but same principle. A home setup would be a laptop form factor device that can take in different video inputs and has a keyboard. A mouse wouldn’t even be required but I guess wouldn’t be ha…

Post by szundi » Sat, Aug 03, 2024, 7:57 AM UTC

Post by szundi » Sat, Aug 03, 2024, 7:59 AM UTC

KennyBlanken wrote: post #82

teraflop wrote: post #46

This looks like a pretty cool device! However, I was immediately curious about how the "dual battery" feature works. The IP5306 power-management IC seems to be designed only for a single battery, and as far as I can tell from the schematic[1], the two battery connectors are just directly connected to each other in parallel (across VBAT and GND). This seems really sketchy. If you plug in two batteries that are not at…

I was going to launch into a lecture about how battery isolation is a Thing, very simple, etc and the author couldn't possibly be dumb enough to not isolate them with diodes, but then I looked at the schematic and yiiiiiiiikes, they're both just tied together, I think. There's a charge management IC and a MOSFET as part of the USB power input...and that's it. I was sketched out by BSI not being connected to anything,…