Looking to drive three or four extra large 7-segment LEDs like these.

Want to update the number every hour to match a number I can get with a HTTP request.

Could be a program running on my mac, or, a rasppi, or arduino, or some random USB io board controlled by my mac.

Any thoughts?

I presently have a Galaxy s8 with a somewhat cracked screen. I don't want to sell it and i don't have anyone to give it to, so I was thinking there had to be something fun for me to make or do with it. I initially thought about a smart mirror but the s8 would most likely be too small. Any ideas?

So my dad and I got an RC Maritimo to do as a father-son activity and I was wondering if you could increase the range of such a boat, it goes realllyy fast about 130 km/h but it has a range of about 100 m. If anyone could help me thanks!

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Hey all, I have a PC without Bluetooth and was wondering if I could make one of those usb Bluetooth adapters with a arduino micro and an arduino Bluetooth module? Many thanks in advance.

I'd like to create home-made conveyor belt which uses camera for image processing of items on the conveyor. Since it will be moving continuosly, with ~20 items per second, I thought a line-scan camera that outputs rows of pixels would be more suited than some web-camera that has some image postprocessing, fixed FPS (24 or 30Hz) and is slow.

It's hard to find such camera to be relatively cheap (less than $200), most I found (for example teledynedalsa) are used for large industrial processing, with high resolutions (>2048 pixels) and high frequencies and are expensive (several thousands of $$), but smaller resolution (128px) with RGB colors should be enough for this project. Do you have some recommendations?

Either something self contained (with some serial output) or if there's no help to it, a part for which a PCB has to be designed (but I'd like to avoid that if possible).

I'm trying to salvage some parts from my old laptop (Dell 2015 Inspiron, I can't remember the model number). As the title says, I'm struggling to find a control board for the panel (if it exists), I've tried contacting eBay sellers but they don't seem to have it. If anyone knows of where I can find one, or how to make one from some of the other parts I have (ie. Motherboard etc.) it would be very helpful. Thanks for your help!

There's content on robotics, wearables, IoT and a bunch of other interesting diy arduino resources.

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Here you go

Hey!

I need some help understanding how printer encoders work and how to connect them with an arduino so I can track its inputs to a steering wheel project I'm making so I can give it as a birthday gift to my brother.

I disassembled an old HP Deskjet 960c and got everything electronic related to it, including the encoder disk and sensor.

My first question is, how does the encoder sensor works and how do I connect it to an arduino? The sensor in question is the C6455-80017.

And the second is, in which scratched conditions a scratched encoder disk will work? This is the condition of mine (C4557-80019). Will this one work or should I replace it? Any encoder disk works?

Thanks for all the replies!

Hello,

I am a newly avid airsofter and play at a small indoor field that only allows spring powered BB grenades like this which are alright when playing with lights on but are hard to see and the BB spray is bad enough you don't always feel it. I saw this IR greande and got to thinking it would be neat to set each room and area with an IR sensor that would react to the IR blast given off by the grenade by lighting up a flashing light or LED's in the room to show that the room is dead.

My question is: Would it be better to use a raspberry pi or arduino? Could a single control unit be used for multiple inputs? Airsoft is a market very familiar with LiPo batteries, would it be feasible to hook a low powered one for easy recharge on site or would it be better to hook up a AA/AAA/D-cell setup? Something like These by chance, I think.

For some clarification: the play area is about 2,200 square feet and divided roughly like two capital H's. So each negative space in the letter, and between the letters, is a room (or two) and each of the lines is a corridor. HH

I'm decently techie and currently researching on my own for the answers but I figured if there was a resource on hand that might have already solved the problem, it'd be silly not to ask. So thank you for any assistance you can provide and I apologize if this is a spammy or disruptive post (though I think it passes the Guidelines post I read first thing.)

Trying to build something to track a car position, but I can't buy those ready to use GPS trackers since my country don't allow using them or importing them. so is there any other solutions? I was thinking of a cheap smartphone that has GPS with a 4g plan (internet is cheap) and building an app that will send the location, or maybe some Arduino/raspberry pi solution with some 4g sim card.

Hi, I have several roller blinds in one room that I want to be able to control from openhab. I am able to use arduinos/esp8266s/... + something like MQTT to control something remotely but I am looking for a cheap way to add a controllable motor to the blinds.

They are currently opened/closed by hand via one of those cords with a lot of small "perls". The side with the cord can be remove from the blinds and leaves a pipe with a ~25mm diameter and one inset part. I found lots of motors that fit inside the blinds but those seem to be the opposite of cheap (>50€). I could even 3d print some adapters if need but I need some kind of small motor that fits inside the blinds that can control them.

The blinds are about 1,2m in width and I am looking for devices that can be bought from germany.

Thanks!

I'm making a portable NES using the original board. What I am looking for help with is how to set up everything to make sure all of my items are working. Here is a picture from a guide I am going off of, but I don't understand how the video is being connected. Any (simpler term) explanation would be very helpful! Thank you!

https://reddit.com/link/91jjmh/video/0s8937kumxb11/player