I originally assumed this would be micro JST, but after a closer look, it's not quite a match.

https://preview.redd.it/3snlazbkjx4e1.jpg?width=3264&format=pjpg&auto=webp&s=a80cb864c0abcd50972d26ad79c4b86e82c2e53c

The device is a Sony e-reader from the late 2000s and I've yet to successfully repair a Sony product, so I wouldn't be surprised if it's unique.

I'm working on a project where I'm using a 3dp winch that pulls around 50lb. I'm having trouble finding a way to fasten the end of the string to a beam. The winch is connected to an end beam. I also haven't found any particular knot that works well or is consistently repeatable over several lines. Any ideas? preferably not tying

There is this sign (wedding seating chart) I saw on Etsy that looks very interesting. I'm curious to know what type of device/machine is used to make something like this? It seems like the words are printed inside the clear glass and they shine when the bottom light is turned on.

Clear LED Seating Chart

Hi all, I thought you'd be interested in this, as it seems to be a hot topic currently with the UK finally banning the sale of disposable vapes. I have been doing some research into disposables and in particular the batteries that they contain which are lithium polymer cells ranging from 360 - 800 mAh. This itself is an environmental nightmare with all the lithium finding its way into the streets and fields.

Vape manufacturers only design their products for one use, which means the battery does not undergo the stress of any charge-discharge cycles. This means that theoretically, they can have batteries not made to safety specifications. For example, Reid et al. found that there was possible misalignment in the electrode layers which may lead to failure if overstressed during charging and worst case fire.

I initially tried charging the small vape cells I found using a standard TPS lithium charger found on eBay, which worked well charging the battery from 2.9V to 4.2V, over multiple cycles and the cells capacity was as specified on the battery (360 mAh the one I tested). however, after a couple of charge-discharge cycles I noticed that the battery was hot to the touch when charging making me end the testing and throw out that particular battery. Heating of the battery can cause thermal runaway, a chain reaction that leads to catastrophic failure of the battery (something I didn't want to burn down my apartment with). This made me theories that dendrites may have been forming on the battery electrodes due to overstressing during charging

This means that for reusing these batteries (which is over 5 million in the UK per week) https://www.bbc.co.uk/news/business-66740556 . It is advisable to follow the normal lithium polymer charging cycle, with extra safety tolerances to avoid overstressing the battery and potentially causing a fire.

• 4.1V - 3.1V Over/Under Voltage Cut-off's
• 1C maximum discharge
• 0.5C maximum charging rate
• Short Circuit Protection
• Thermal protection

I then found a board designed by a fellow Redditor that had been designed specifically for converting vape cell batteries for electronic products that boasted the characteristics outlined above. I then charged and discharged the cells as before using USB-C for this. After 100 cycles, I have not noticed any swelling, venting or heating during charging from the cell as before and it still keeps around 90% of the 360mAh capacity showing they are still good for new electronic products given suitable safety precautions. If anyone is interested in the data that I collected for ask me and I can work on making it look pretty and add it to the post! Hope this was useful.

i wanted to fix and customize my moft wallet and the part that broke was that thing in the middle. I coul grab some silicon from my broken ice tray, but the problem would be when it’s flat, there would be extra material. Any suggestions for something that can expand can return to form?

Hello! I am beginning to get into working with simple mechanics and am looking for any good book recommendations. Think automata, clocks, music boxes. What I'm finding, however, is that I want to understand the mathematical base first, and outside of mechanical engineering textbooks or highly specific watchmaking books, I'm having a hard time finding good books.

What I'm looking for would be something talking about the types and uses of gears, the mathematics of gear ratios, cams, escapement mechanisms, flywheels, mainsprings, even extending into material discussions (brass vs steel, ect) and toolings.

tl;dr I want to understand simple mechanics. Any book recommendations?

I am looking to build a recreate this sarcophagus "dress" designed by Gareth Pugh. I made a version of it this past year out of Insulation Foam but it was a bit of a nightmare to work with. Looking for help or suggestions in executing this. My new initial idea is to use 1x1 or 1x2 lumber to build the frame of it and then use boards or foam sheets to cover the frame. I also need to make it separate sections (the waist up and then from the waist down so it would have several small sections that go together to create this as it will need to travel in a small trailer.)

I appreciate any and all suggestions and help!

* Others have suggested Eva Foam but what thickness and would I need a frame support or could Eva stand up on its on like this?

https://preview.redd.it/bsy2ct8y444e1.jpg?width=1200&format=pjpg&auto=webp&s=be748e31f43ca91c89565a15437263fd5aa51028

https://preview.redd.it/9smibu8y444e1.jpg?width=817&format=pjpg&auto=webp&s=9ec5b7f6efd43e5f8608ff837d8e95d12167afcd

https://preview.redd.it/gbrbht8y444e1.jpg?width=400&format=pjpg&auto=webp&s=7240e488a34dba1a4b009fc67948b6566b4a26ca

Hi there,

New here, hello to everyone. Originally posted this in the Electronics subred, but they showed me the door and told me to try here.

I am designing my own desk charger stand. I am currently using a wireless charger from Aliexpress. It is supposed to be 65W but I doubt. Works fine for my Galaxy S22Plus though.

I want to have the option to charge another device while wireless charging my phone. I was thinking of using this module. Here is a bit of detail from Aliexpress:

Power supply method: Use a charger with a fast charging protocol or a power bank TYPE-C interface for power supply
Output mode: fixed 9/12/15/20V four gears
Output current: Maximum support of 5A, actual output current/power determined by charger and load
Precautions:

1. Fixed 9/12/15/20V four gears, what voltage is needed, just short circuit the corresponding solder pads.
2. For example, if you set a trap of 20 volts, but your charger only has a maximum of 9 volts, it will automatically downshift to trap the output of 9 volts.
3. The maximum support is 5A, and the actual output current/power is determined by your fast charging charger and load.
4. Mobile phone chargers must first support fast charging such as PD/QC in order to trick out voltage.

https://preview.redd.it/qee3fij5534e1.jpg?width=1001&format=pjpg&auto=webp&s=5feda707c730539fd5eb136168cd9e0c05af78fc

My idea is to solder the 20W pad on the module, stick it to the back of the desk charger. This will be the input where I connect the wall charger.

On the output of this module, I solder 2 of these usb ports. One will go to the wireless charger (I don't want to cut the usb side just yet) and the other goes on the back, to charge an external device.

https://preview.redd.it/bkba4vr7534e1.jpg?width=1000&format=pjpg&auto=webp&s=d9e9277cf9f77e84608e805bbb48673ed7d6c300

Questions:

• Does it all fly?
• Will this system have enough power to charge wirelessly and also charge an external demanding device? This is ofc assuming I use a discreet wall charger
• Are these components going to get very hot? The desk station will be made of plastic. As a reference, the wireless charger I currently use gets less than lukewarm when charging.

Thanks for your help!

Looking for storefronts with little bits and pieces for projects.

Anyone that has been paying attention to those types of store fronts have recommendations?

Ideally that will sell bulk packs of various sizes and variants competitively priced shipped to the US.

Specifically looking for Metri Pack 630 female crimp terminals currently.

But also things like a multipack of different sized copper crush washers in a partitioned case with labeled sizing?

Looking for 3/4-10 SS bolts.

Just picked up ~300 M3x20 SS allen cap heads for a few bucks...

Always need small electronic modules that fit a need, or components to modify a existing part.

Even required specialized tools that are “good enough” to complete a projects, and are essentially 1 use and go into cold storage.

And every other type of small hardware, component, etc.

Every day it’s some other type of specific small hardware part and piece that I can no longer get locally...

Are there specific sites similiar to the 2 listed above that are “trustworthy enough” to consider for small parts and pieces that are typically priced competitively ?

With banggood, if I use PayPal for checkout, I have never had a problem, and I cant believe some of the prices for parts I can get from that site shipped!

Many parts seem to be located in the US now, and are ~week out...

Is there a sub that is more focused on the “buying” “locating” parts for projects to know about?

Especially with a DIY cost effective slant?

Hi friends!

I plan to build a stable for my nativity set. Not from wood. I want it to look as an old israeli house. I need to be able to carve and paint. And it has to be firm enough to stand up. I have used styrofoam earlier but wish to find something else to work with. Any ideés.

Hello - I just joined this community. I'm trying to get 3 linear actuators. 4 to 6 inches. It is going to support less than 5 lbs on a hinge. It's not going to be doing any heavy lifting at all, so doesn't need a lot of torque.

Everything I see online is like $40 for each one.

I thought something with low specs would be cheap.

I made a "hiking bench", which is a training device for sailing, out of 2020 aluminum extrusion. I'm happy with the design, but as shown in the picture, there is a fair bit of flex.

This is my first project with Aluminum extrusion. I've looked online and seen strength numbers like 30,000psi. I'm surprised to be bending it with <200psi?

I'm wondering if I should be worried about this breaking or permanently deforming? And what would be a good fix? I could make the bottom bars out of 2040, or increase the length of the diagonal bracing. Or do diagonal bracing on both sides.

Thank you!!

Someone is trying to trademark "makerspace" - should we stop them?https://tsdr.uspto.gov/#caseNumber=98117557&caseSearchType=US_APPLICATION&caseType=DEFAULT&searchType=statusSearch

I heard an old rumor that makerfaire had trademarked makerspace, I decided to check this and they haven't, probably because you can't, but someone is trying to. I would hope this get denied due to being a commonly used term but I don't know much about these things.

I make costumes and mechanical art and after each project there are .5" to 2" scraps of fabric and tape and paper and cardboard and string and...all over the floor and carpet (yeah carpet is annoying). This stuff clogs every vacuum I've ever had. A shop vac seems like the next step but rather unweildy. What do yall use?

Any recs for a fairly comprehensive fastener kit? Both metric and SAE up to say #10 or ~5mm. Primarily dome head and flat head in a variety of lengths. I'm tired of going to the hardware store for a single screw. This doesn't need to be a lifetime supply (<10 of each variety would work), but I'd like to cover 95% of my small fastener needs.

Inspired by a video by StuckAtPrototype where he shows his open source awesome mini car, I decided to open some drawers and see what I could come up with using the same click-your-motor-in-place-on-a-platform approach and used some excessively overpowered mini drone motors.

The thing is controlled via webserver for now, it serves a simple page with basic movement and speed control that works well enough on mobile.

My plan was to build a tiny camera car, but seeing the speed this thing can get to, I may switch to a speedster project. Proper PCB will take some time, It’s been a while.

Hi everyone!
I’ve been working on some innovative hardware projects that combine AI and retro designs, and I think you might find them interesting. Here are a few devices I’m currently developing:

1️⃣ AI Recorder: Supports real-time recording, speech-to-text, and AI-generated summaries. It’s multi-language compatible and has built-in storage.
2️⃣ Daily Summary Box: Automatically generates a daily journal by converting speech to text and extracting key points. It also supports external displays and USB storage.
3️⃣ Holographic Display: Displays audio file content and analysis results. I’m considering combining it with a CRT-inspired design for a compact, portable experience.
4️⃣ CRT Phone: A retro-style phone that supports an AI assistant and recording features, running on an Orange Pi system.

These projects are in different stages of development—some are just prototypes, while others are already being implemented. I’m planning to make a video showcasing the development process, but I’d love to hear your thoughts first:

• Which of these devices interests you the most?
• Are there any features you’d suggest adding or improving?
• What kind of content would you like to see (e.g., technical details, live demos, behind-the-scenes)?

I’d really appreciate your feedback. Thanks in advance! 😊

Used nothing more than a sharp knife, and a little time. An old world style Santa.

I have assembled several of these Makey Bot badges at Maker Faires with my kids and I think the LEDs are cool. But does anyone know what kind of LEDs these are? I can't seem to find them online. The change color and also blink.

i am trying to stick some LEDS to the back of my monitor and i have tried to do it with double sided foam tape and normal tape but it hasn't worked and i am not wanting to go out and buy other things to stick it on. I have a hot glue gun in my house and wondering if i can use it

I’m interested in learning to work with resin and told «jesmonite» is a safer and greener resin to work with. I’m looking to do both thin, semi-clear panes and big, solid blocks, for lamps. Any advice or feedback appreciated.