If you’ve ever wanted to wind balls of yarn, then look no further than this automated machine from Mr Innovative. The YouTuber’s DIY device is powered by an Arduino Nano and an A4988 stepper driver, spinning up a round conglomeration of yarn via a NEMA17 motor and a timing belt.
The ball is wound on an offset spindle, which is mechanically controlled to pitch back and forth and spin itself as the overall assembly rotates, producing an interesting geometric pattern.
In this tutorial, you’ll learn about using Arduino ir remote. First, you’ll see how to connect the 1838 ir receiver with Arduino Uno and how to Find the Code for each Remote Control Button. Second, you’ll see how to use ir remote to control any device connect with Arduino LEDs, DC Motor, or any more.
I needed a device that can store the date of a specific event, which I can check later. To be more precise, I needed a device that can store the last date I fed the flowers. The device must be portable and powered by a battery. And because a whole display only for one date is a bit of a waste, I decided to add more features like weather and calendar widgets.
The obvious choice for the display was E-Paper, and for the IC initially, I picked esp8266, but after comparing it with esp32, I had to switch it.
The esp32 has a feature that is very important for this project – esp_sleep_enable_ext1_wakeup. This allows IC to wake with almost any from the GPIO(here a good tutorial https://randomnerdtutorials.com/esp32-external-wake-up-deep-sleep/).
Looking to drop the proprietary power supply, jakobnator’s upgrade means the laptop now charges from a common Type-C adapter.
Pseudonymous YouTuber “jakobnator” has published a video showing how he upgraded an older Dell laptop to charge using a USB Type-C port, via USB Power Delivery (PD) — doing away with its proprietary power brick in the process.
“So I’ve had this laptop for about six years now,” jakobnator explains. “[It] got me through college, and I really like this line-up of XPS13s. It’s a good size MacBook alternative, but as I’ve been travelling more I’ve been trying to shrink down things so that I’m only carrying one charger.”
Today we will be working with two different color sensors.
I’ll show you how they work, how to hook them up, how to calibrate them, and how to extract RGB values from them.
The TCS230 (also known as the TCS3200) is a popular and inexpensive color sensor that operates on a wide voltage range. It outputs a square wave whose frequency reflects the color intensity.
The Sparkfun ISL29125 is a more capable sensor that provides a 16-bit digital output using the I2C bus. It also has a programmable interrupt feature that you can set to trigger in response to a specific color.
If you want to start an argument between technophiles, just bring up smart speakers. An outpouring of strong opinions is all but guaranteed to follow. Some will point to the conveniences of interacting with devices by voice command. Others will focus on the privacy concerns associated with having an Internet-connected speaker in your home, sending who knows what, to who knows where, to do who knows what.
The USB device is outfitted with a pair of removable EEPROM chips that store credentials using AES-256 encryption.
It’s not uncommon for most PC users to have multiple accounts and passwords for a host of different sites and applications. Trying to remember all of those credentials can be a pain or a downright disaster if passwords are forgotten, not to mention hackers could steal any sensitive information. To that end, the safest and easiest way to manage website passwords and other credentials are to store that information offsite, rather than locally or in the cloud.
Compact surface-mount add-on offers a fully-functional DVI video output without sacrificing breadboard compatibility.
Engineer Luke Wren has released design files for a handy Raspberry Pi Pico upgrade, giving the low-cost microcontroller a DVI video output with a minimal increase in footprint: the Pico DVI Sock.
“[I] called it a Sock because it’s like a HAT [Hardware Attached on Top, a standard for add-ons which fit on the Raspberry Pi single-board computer family’s 40-pin general-purpose input/output (GPIO) header] but small and on the bottom,” Wren explains of the board, which adds little more than the size of an HDMI socket to the end of the host Raspberry Pi Pico.
This is a quick project video on my Hard Disk Drive Persistence of Vision Clock V2.0 or HDD PoV Clock V2.0 for short.
I created this clock out of a 2.5″ Server HDD, 2 custom designed PCBs and a lot of patience. The processor used in this clock is an STM32F411RET 32bit ARM microcontroller. I’m using WS2812B LEDs (all LEDs have their data lines connected in parallel), a DS1307 RTC for time keeping and an ESP8266 WIFI module for future features.
Bands on through-hole resistors conveniently indicate their value at a glance. On the other hand, you have to actually know the code to interpret this meaning. Alternatively, you could use the Ohmmeter 2.0 — developed by Miguel Alejandro Ramírez Anaya and José Miguel Galeas Merchán from the University of Málaga in Spain.
