For my Halloween costume this year I’m making a black and white monster costume, and I want to include a slide projector on my head. The issue with this is I’m struggling figuring out the logistics.

I’m planning on using very simple stuff like a flashlight and magnifying glasses, as I know the basic components of a slide projector. Unless anyone has any suggestions on how to make it better than just using those, as I’m sure it’s all about finding the right balance.maybe someone’s made something similar before.

Anyways the issue is I can’t find a reliable Bluetooth
flashlight, and I might have to figure out a way to place a button on the side of my head, but that would require taking out wires and I’m not familiar with electronics (especially ones powerful enough to make a clear projection image). So maybe someone can point me in the direction of a very simple kit that includes a raw LED?

I’m just trying to make the image clear for about arms length away from me as I’ll have a movie set clapper to display it on.

Trying to decide between a corded setup and a wireless machine for practicing at home. corded seems more consistent from what I've read but wireless gives you more freedom to move around, which sounds appealing

The price difference isn't massive, but I don't want to spend more if corded is genuinely better for building fundamentals. on the other hand if wireless has gotten good enough that it doesn't matter, I'd rather just go that route from the start

Has anyone here learnt wireless from the beginning? did it affect how you developed your technique or is it basically a non-issue these days

The description in English and German:

Hey, I built a Rubik’s Cube out of a LED strip and an Arduino Nano. It is controlled by an infrared remote and so can do every possible turn and rotation (both directions). It can be scrambled on command and also jump into solved position (it doesn’t solve itself on its own yet…). I have included an y-perm (because why not) and the possibility to lower or increase the brightness, it also can be turned off (at least the LEDs) with one button press. When it is solved it plays the blinking animation. Last but not least it has a rainbow LED mode which makes it phase through all possible colours and then returning into the colours it had before.

I didn’t generated code with ai, this project was made by notes on paper and many (sometimes painfully obvious) errors.
By now this project is far from finished, my next step is to plan and do the aesthetics like colouring the wood black and diffusing the LED‘s light.
If you have some ideas that could be added please comment them, thank you.

Hallihallo, ich habe einen Rubikscube bestehend aus einem LED Streifen und einem Arduino Nano gebaut, welcher über eine normale Fernsehfernbedienung gesteuert wird. Jede mögliche Drehung oder Rotation kann mit der Fernbedienung durchgeführt werden. Man kann den Würfel automatisch verdrehen und auf Befehl wieder in den gelösten Zustand bringen (er löst sich dabei nicht selbst).
Spaßeshalber habe ich auch noch einen Y-Perm hinzugefügt, welcher auf Knopfdruck ebenfalls automatisch durchgeführt wird. Wird der Würfel gelöst, erkennt er das von selbst und blinkt kurz.
Die Helligkeit der LEDs lässt sich durch zwei Tasten ebenfalls anpassen oder auch mit einer Taste komplett verdunkeln oder wieder aufleuchten lassen. Zum Schluss gibt es noch eine Animation welche alle möglichen Farben durchgeht und dann wieder in den letzten Zustand des Würfels zurückkehrt.

Für dieses Projekt habe ich keinen Code mit KI generiert. Es basiert auf Notizen auf Papier und vielen Fehlern.
Natürlich ist der Würfel noch nicht fertig, demnächst werde ich mich um das Äußere kümmern, beispielsweise das Holz schwarz zu färben und das LED Licht durch eine Blende zu verteilen.
Falls ihr noch Ideen habt, die man hier umsetzen könne, bitte kommentiert diese. Vielen Dank

I have a old laptop a pretty thick one from late 2000s I think the battery is broken so is the keyboard and touch pad also I want to be able still use the original motherboard in the diy

Edited only added image

Please suggest any shops in Bangalore to purchase kids science projects products like battery, solar panels, servo motors,microcontrollers, ultrasonic sensors,etc.
Thanks in advance.

I originally made this as an actual side project (Desktop Server Monitor), but at the end decided to add watch straps and make a goofy product video for it too

Posted here is the more serious bit, but goofy video linked below

The monitor is originally designed to sit on a desk and locally talks to my server (old laptop running linux) running a portfolio site and API. It monitors CPU usage, RAM usage, database latency, and whether the internet is up or not~

Microcontroller is ESP32 S3 (overkill? not sure) so runs on 4 AAA batteries and pings my server every 60 seconds, but can manually be triggered by pressing in the knob for 3 seconds

Designed this to be easily reprogrammed (bottom pops off and usb ports accessible) so can be reused for other stuff too

Goofy Full Video: https://youtu.be/J7FUxnNbsSY

I heard the official Ray Neo Pocket tv has some issues and doesn’t support Netflix. But I wanted something to watch Netflix on that wasn’t my phone so I made my own pocket tv. 40k power bank with Roku stick plugged into a USB C Video out converter for XR glasses. Works great on my Ray Neo Air 4 Pro. I recommend 👍🏼 (btw I know I can just my t.v but the image and colour in this glasses are next level)

I get hand cramps and fatigue from playing any handheld console... switch, portal, SD. I have been interested in the Mechanism Gaming Pillow, but didn't want to spend $60. So I rigged up my own version of a gaming pillow using a laptop lap desk, dashboard magsafe phone mount, and some adhesive metal plates.

So far it's been an absolute lifesaver

I recently purchased a secondhand laptop from a local computer repair guy, and while the computer itself seems good the thing reeks like cologne. I didn't notice when I went to pick it up because the seller seemed to be smoking a pack a day in his shop, but as soon as I left with it the cologne smell was pretty unavoidable.

I've cleaned every surface including the inside components and blasted it like crazy with an air compressor, but some of the scent still remains. I've never dealt with something like this so any help is very appreciated! Is there some kind of odor absorber I could stick it in a box with for a while? This is such a bizarre situation to be in and I have no idea what to do since there's a limit to how much washing a laptop can take lol

Please see https://redux.boondog.com/courseware/bnb/bnb.html - LEGO and LEGO-compatible parts are used to quickly and affordably construct a tabletop ball-and-beam (BNB), without tools or need to 3D print or machine any parts.

The page includes: full LEGO build plan; bill-of-materials; schematics (and KiCad files if a PCB is wanted); and Arduino source code. These are fully documented and supplement with videos.

Our university lab's Quanser platforms are over 15-years old and with our increased student enrollments (mechanical engineering), sought an alternative. I tested a 10-week beta course in Control Systems Lab. I wrote both the Student Lab Manual and Instructor Supplement Manual for: PID, Lead Compensator, Pole Placement, LQR and Fuzzy Control.

There's a short *anonymous* poll at the end to gage demand for the PCB, linear potentiometer, Bricks, and/or turn this into a kit.

PS: There is quite a lot of open-source content to peek at as well, from the above URL.

Thanks and hope this is useful!

PPS: Please please alternative sub-Reddit if this an inappropriate one. I'm an old-school newbie.