DIY Mini CNC Laser Engraver.

This is an Instructables on how I Remixed my old CNC Laser engraver and made a Stable version of an Arduino based Laser CNC engraver and thin paper cutter using old DVD drives and using 250mW laser.

Old Version of My CNC :

Old version was not much stable and had some wobble due to uneven parts, so I decided to make a stable version of it using 3D printed parts. Which gave me excellent results in laser engraving even in very tiny details, this machine is cable of doing the work well. You can see the details in the eye of the engraved picture.

Playing area is 40mm x 40mm max.

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This Acoustic Levitation Wand Will Make You Feel Like a Wizard

Nothing is cooler than Redditor We-Make-Projects’ Arduino-powered sonic tractor beam!

Levitation has long been the domain of stage magicians, charlatans, and fiction, but there are technological means of achieving the same result. Aside from aircraft that could be considered to be levitating on air and boats that do the same on water, the most common examples of levitation in real world are maglev (magnetic levitation) trains. But you’ll probably never be able to build your own maglev train in your backyard. You can, however, experiment with acoustic levitation. We’ve seen a handful of notable acoustic levitators here on Hackster, but nothing is cooler than Redditor We-Make-Projects’ acoustic levitation wand that makes them a modern wizard.

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Homemade machine puts a new spin on winding yarn

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.

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Design and Development of a Robotic Hand

Over the few years, there have been great steps in the development of functional prosthetic hands. However, even the most advanced hands lack a combination of high functionality and affordability. A new prosthetic hand has been designed and developed combining high functionality and affordability thanks to rapid prototyping techniques. This video presents the design of a five-fingered prosthetic hand that can be programmed to have multiple grip patterns using force myography (FMG) as a control signal instead of electromyography (EMG) signal. A novel FMG sensor was developed using strain gages and a high resolution ADC to detect mechanical muscle contractions from the residual forearm of amputees.

Arduino IR – Control LEDs with Arduino remote control [Using 1838 ir sensor]

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.

Arduino Color Sensors – TCS230 & ISL29125

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.

The Ohmmeter 2.0 displays resistor band colors

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.

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Akira Kaneda’s Bike – Arduino & 3D printing

– 3D프린터와 아두이노를 이용해서 제작한 아키라 바이크 입니다.
– RC BIKE V1을 기반으로 디자인을 변경한 버전 입니다.

BLE MotorShield…
RC BIKE STL & Arduino code…
Controller App : android :…
ios :…

ESP32 Dual Core on Arduino IDE including Data Passing and Task Synchronization

The new ESP32 has three cores. Two of them are very fast; the third is ultra-low power.
The Arduino IDE typically only uses one of the fast cores. Today:
– We will take full advantage of the second core of the ESP32
– We will test if it really increases the capacity of our microprocessor
– We will also compare its dual-core speed with the speed of an Arduino UNO
– We will try to synchronize tasks, even if they run on two different cores
– We will also try to use the same data on both cores
– These two mechanisms are mandatory if you want to use the two cores in a productive fashion
– And we will not leave the Arduino IDE. Promised