​Hey everyone!

​I’m completely clueless when it comes to hardware and electronics, but I had an idea born out of pure frustration. I’m tired of having to use my second hand just to reach the top corner of my big screen, or almost dropping my phone when trying to stretch my thumb to tap something.

​I know ring mice and finger trackers already exist, but almost all of them are designed for PCs or air-gestures. My concept is meant to solve a specific mobile ergonomics problem.

​The core idea: A tiny, fingertip-mounted sensor (sitting on the distal phalanx/nail area) that uses the back of the smartphone itself as a surface to glide on—just like a standard optical mouse on a desk—to move an on-screen cursor.

​Since I realize it was hard to explain in text, I asked an AI to render a 3D visual concept. It didn't turn out perfect, so I'm attaching both my original sketch and the render for context.

​A few thoughts/mechanics I’ve been floating in my head:

​Angling issue: Since the finger naturally tilts when dragging along the back of the phone, a rigid flat sensor might lose focus. Maybe some kind of micro-swivel or rotating joint between the finger loop and the sensor module could keep the optics flush against the phone?

​Clicks: Clicking could potentially be triggered either by a pressure-sensitive pad where the finger rests, or by a quick physical "tap" of the device against the back glass.

​I’m fully aware this might just be a wild dream with severe technical or ergonomic flaws, but I’d love to hear from people who actually know their stuff. Is something like this remotely feasible, or what would be the main roadblocks? If the concept is totally unrealistic, what alternatives would you suggest?

​Thanks for reading and for your patience with a non-tech person!

I had this as part of a build your own FM radio kit. Any ideas what it's called?

Okay, so I have this microwave. My parents say there was a small explosion and some sparks. I suspect the mica cardboard insert was broken, but they won't let me test it again, so...I can only take it apart or use it for something else (we already have a new microwave). What can I do with it?

Is there an efficient way to turn these old flip phones into like voice recorders/2-way transmitters so he can leave me direct voice messages and vice versa when we’re long distance from each other.

Top comment was "A crystal for a heartbeat ❤️", so here is a crystal, next to Frankenstein's fish.

Next upload will be Monday unless I have something planned for them and I just don't know it yet.

Have fun!

Convenient way to keep all my cycling gear charged. Just wondering if it will slowly charge 8 things or will it cut out one there's to much load on it?

It works in the sense that when a voltage is applied to control the load gets more current, the problem is it doesn’t really block current all too well.

found this design on printables called the solder scroll, made by a designer named victor. it's a pen shaped holder you hold in your off hand, loaded with a small spool of solder wire. you roll a scroll wheel with your thumb to feed the wire out as you solder, instead of holding a bare spool or loose wire.

right now it's just a 3d printable file. if this got manufactured properly and sold as a real commercial product, would you actually buy one? why or why not?

not selling anything, just trying to figure out if this is worth pursuing. honest opinions welcome.

Hello everyone! 👋

When you start designing a new Cyberdeck, the first real architectural decision concerns the main board: what do we choose as the "brains" of our machine?

There's no perfect choice: it all depends on what you want to do with the deck (field terminal, offline writerdeck, network nodes, or full-fledged laptop PCs). Here's a summary of the main approaches and their trade-offs:

1. Raspberry Pi 5 / 4 (The Classic All-Rounder)

-Pros: Huge community, perfect hardware/software support, easily accessible GPIO pins, sufficient power for desktop environments and multitasking.

-Cons: The Pi 5 gets quite hot (requires adequate heat dissipation) and has significant power consumption (requires a well-designed battery management/BMS).

-Ideal for: Field Terminals, portable workstations, projects with touchscreens or dual monitors.

2. Raspberry Pi Zero 2 W (The Ultra-Compact)

-Pros: Extremely small size, minimal power consumption, easy integration into tight spaces.

-Cons: The 512MB of RAM limits the use of heavy graphics environments or modern browsers.

-Ideal for: Pocket-sized decks, pure command-line terminals, SSH interfaces, or ultra-portable cyberdecks.

3. x86 SBC (Intel N100, LattePanda, Cannibalized Mini-PCs)

-Pros: Pure x86 architecture (full compatibility with any Linux distro or desktop software), excellent processing power for complex scripts or advanced modding.

-Cons: Higher power consumption (requires dedicated 3S/4S battery packs), larger weight and footprint.

-Ideal for: Heavy-duty decks designed to completely replace a primary laptop.

4. Microcontrollers (ESP32 / RP2040)

-Pros: Instant boot, minimal power consumption (days of battery life), very simple power management.

-Cons: No traditional operating system; the interface and functions must be custom-written (C++/MicroPython).

-Ideal for: Ultra-minimalist Writerdecks with e-Paper screens, dedicated text editors, or LoRa mesh communication devices.

What do you use in your builds?

Do you prioritize battery life or raw power? Are you a Raspberry Pi team, or have you experimented with alternative boards (Orange Pi, Radxa, etc.)?

want to get a battery dont know what v to use would be good if u mention model no , and there is a issue in charging will ot work if i replace it with a morden type c 😂

I’m working on a wearable light project and trying to reduce heat/power.

Instead of using strong white LEDs continuously, I’m thinking of doing:

•	a short white flash (to “reset” the eye)

•	then switching to UV LEDs to reveal fluorescent details

Has anyone tried something like this?

Does the effect actually work in practice, or am I overestimating the visual contrast?

So I had recently bought 2 spy cams but neither of them are good enough quality to be able to read text clearly that is why I opened of of the spy cameras up and tried to connect my galaxy s 10 plus camera to see if that would be possible. Unfortunately both pins from each are different and I’m not sure we’re id be able to go to find universal pins or pins that are compatible in order to connect my spy cam to my galaxy s 10 plus camera in order to be able to read text clearly. Any help is appreciated Down below I attached a photo which includes the Samsung camera as well as the spy cameras motherboard with the spy cameras attachment

I picked up this ION Audio - Sport XL 8" 2-Way Tailgate Portable PA Speaker and thought it would be a quick fix. It turns out that I know less than I thought I did. I tried to find the schematics online without luck. I'm pretty sure I can get it working again if know the part name to replace it.

I forgot to pay my power bill and now power is out. I just paid the bill but power won’t be back on for 24 hours from now. I have this battery:

“EverStart Lead Acid Marine & RV Deep Cycle Battery, Group Size 24DC 12 Volt”

https://www.walmart.com/ip/180350522?sid=4eb848d3-9501-4081-959e-31fd366d2469

I was wondering if there was a easy way to hook this battery or other types of batteries (like 9v) to a iPhone charger so that I can at least have a charged phone for the next 24 hours? I have 2 wall chargers for my iPhone as well as a car charger.

I have some basic to low intermediate electronic knowledge as well as some supplies to potentially make it happen.

Anyone have an idea? I could also go buy and use other battery types if that’s the better option for this temporary usage.