Homemade 6 GHz FMCW radar

Introduction Previously I made a simple frequency-modulated continuous-wave (FMCW) radar that was able to detect distance of a human sized object to 100 m. It worked, but as it was made with minimal budget and there was a lot of room for improvement. FMCW radar working principle If you have read my previous articles you should know how FMCW radar works, but for completeness sake short explanation is given b ...

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Arduino Uno R3 Battery Tester

This simple project is intended to help you in answering the lifelong question "Does this battery have any juice left?". Although popularity of single cell batteries (such as AA, AAA, C and D cell) is diminishing, there are still many small devices like TV remotes, flashlights, and other small portable electronics that run on these forms of power. Step 1: Hardware Required In order to make a battery tester, ...

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Microchip LoRa Network Module

Microchip Technology Inc., has announced the first in a series of modules for the LoRa technology low-data-rate wireless networking standard. The system is designed to allow Internet of Things (IoT) and Machine-to-Machine (M2M) wireless communication offering a range of more than 10 miles (suburban), a battery life of greater than 10 years, and the ability to connect millions of wireless sensor nodes to LoR ...

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CORE ROPE MEMORY MAKES ONE OF THE ODDEST LED FLASHERS WE’VE EVER SEEN

If you’ve heard of core rope memory, it will probably be in the context of vintage computing equipment such as Apollo-era NASA hardware. A string of magnetic cores and sense wires form a simple ROM arrangement, which though long-ago-superceded by semiconductor memory remains possible to recreate by the experimenter. It’s a path [Nicola Cimmino] has trodden, as he’s not only made a few nibbles of core rope m ...

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AirLift FeatherWing ESP32 WiFi co-processor now available

Adafruit has announced the arrival of the new AirLift FeatherWing ESP32 WiFi co-processor this week, making it available from their online store priced at $12.95. The small FeatherWing board allows you to use the powerful ESP32 as a WiFi co-processor. Adafruit explains a little more about the benefits of using the processor for your wireless connectivity. “Having WiFi managed by a separate chip means your c ...

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Electromagnet Superhero Glove

For a class assignment, I needed to make something fabric-based which took an Arduino, some programming, and at least two inputs and outputs. After sketching a few different ideas, I hit on this one: an electromagnetic glove for MagnetoGirl. It sprang to life for me, because magnetism is an invisible force which can seem magical. Also, a superhero can be given life, character, and (the best part) a cool cos ...

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BristleSwarm: Explorations into Swarm Robotics

A growing branch of robotics research is the study of swarm organization, emergent behavior and artificial intelligence through the use of autonomous robotic agents. In this Instructable, I’m going to walk you through a one week project that I created as part of my Masters Architecture studies at theCalifornia College of Arts in collaboration with Prerna Auplish. The studio, run by Jason Kelly Johnson and M ...

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Quick-Turn PCB shop review project: Elecrow

After my initial PCB success with Maker Studio, I uploaded the design files to three more board houses. I had planned to try four or five more, but I started to get the impression that many of the China-based sources used the same fab house, so I stopped at three. Elecrow's basic board fab service supplies 5 or 10 PCBs for $11.90, with a basic international shipping cost of around $7 for 5 boards. Although ...

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Program Arduino Pro Mini Using Arduino Uno

Hello everyone. Today I am going to show how to program arduino pro mini using arduino uno. If you already had a arduino uno and you newly buy arduino pro mini then you don’t need to buy the USB to serial converter to program the arduino pro mini because you can program pro mini using your arduino uno board. We can make pro mini to act as a central ic for arduino uno board. First of all you have to know whi ...

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HACKADAY LINKS: SEPTEMBER 8, 2019

We start this week with very sad news indeed. You may have heard about the horrific fire on the dive boat Conception off Santa Cruz Island last week, which claimed 33 lives. Sadly, we lost one of our own in the tragedy: Dan Garcia, author of the wildly popular FastLED library. Dan, 46, was an Apple engineer who lived in Berkley; his partner Yulia Krashennaya died with him. Our commu ...

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Arduino Xylophone

I made a xylophone that uses an Arduino Mega to detect when a note is struck, and generate MIDI output. This project is wondeful because I essentially made a xylophone, a drumkit, and any other MIDI controlled sound instrument, with one tool. The following steps  will outline what I used to make this xylophone. https://youtu.be/w2GtNwTf-9c Step 1: You Will Need... To construct the xylophone I used the ...

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Controlling an LED

For this part of the tutorial you will need: Usb to Mirco USB cable. Ethernet Cable. A computer. An SD card (4GB or bigger). A breadboard Female to male jumper cables or the Adafruit Assembled Pi Cobbler Breakout. 330 Ohm resistor. A bit of Electronics A voltage source is a constant is a source of electrical energy which has a fixed voltage and can be used to power electric and electronic devices, such as a ...

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