alt.hn

5/23/2026 at 9:06:37 PM

A self-powered computer in actual credit-card size (~1mm thick)

https://old.reddit.com/r/electronics/comments/1td7yxl/i_built_a_fully_selfpowered_computer_in_actual/

by gnabgib

5/23/2026 at 10:39:56 PM

Slight clarification: It’s battery powered and has no energy generation or harvesting capability.

by thebruce87m

5/23/2026 at 11:23:05 PM

If we're going to gatekeep "self-powered" this hard, might as well clarify that energy cannot be created.

by majorchord

5/23/2026 at 11:47:17 PM

Let be honest though. Do you really consider something like your phone "self powered"? I know I wouldn't. My light switches that are powered by the click, those I would.

by malfist

5/24/2026 at 2:26:46 AM

Pfft, this thread got derailed rather quickly; Lets get it back on track! I welcome our new Credit Card sized computer overlords.

I would pay dearly for a credit card sized eink display, that could feed HN, from Wifi, and even with a 2Lb lead acid battery, it would be a joy, and head and shoulders above my current ball and chain type android cell phone.

Make it so.

by ForOldHack

5/23/2026 at 11:50:21 PM

[dead]

by Terr_

5/24/2026 at 10:01:14 AM

I feel like “slight clarification” and “gatekeeping … this hard” are at opposite ends of the pedantry scale and I didn’t say it wasn’t “self-powered”, I merely clarified its capabilities.

by thebruce87m

5/24/2026 at 3:05:40 AM

I thought it was going to be like a solar powered calculator

by NDlurker

5/24/2026 at 1:52:56 AM

[dead]

by aaron695

5/23/2026 at 11:07:53 PM

There's much more information in the linked github repo at https://github.com/krauseler/muxcard

It even includes an eInk display as well as the battery.Insane, but really impressive.

by niccl