Sensor board for micro:bit

Features 3V and GND connections can be made from either side and allow you to power a second board such as the MonkMakes Relay Board or MonkMakes Speaker. LED ‘power on’ indicator Reverse polarity protection All three sensors are analog and can be connected to pins P0, P1 and P2 using alligator clips. Getting Started Connecting to your micro:bit You only have to wire up the sensors that you are actually usi ...

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A CUSTOMIZABLE OPEN SOURCE MECHANICAL NUMPAD

Mechanical keyboards with reduced key counts are all the rage these days, but while those streamlined input devices might look cool on your desk, there are times when the traditional number pad or navigation keys are quite handy. Rather than just going without, [Mattia Dal Ben] decided to put together his own mechanical auxiliary input device for when the main board just isn’t cutting it. [Mattia] is callin ...

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Interrupts Debouncing with Zerynth (Python for IoT)

In this tutorial, we'll see the advanced feature of interrupt debouncing using Zerynth. Things used in this project Hardware components Arduino MKR1000 × 1 Jumper wires (generic) × 1 Software apps and online services Zerynth Studio Story [embed]https://youtu.be/iX2AlezDPVE[/embed] https://www.youtube.com/watch?v=iX2AlezDPVE&feature=youtu.be In this tutorial, we'll use PWM to show the advanced feature of ...

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Creating a Smart Water Sensor with the ESP32 Thing

Over the Christmas break, my parents were out of town to celebrate the holidays. When they came back, they saw something every homeowner fears – a flooded basement. In a basement, there are pipes that collect water from around the foundation and bring it into the sump pit, which pumps it out away from the house. When the sump pump fails, water has no way to leave the basement and it floods. I recently bough ...

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Alzheimer’s: Hope on hand for caregivers

Jubilee Hills: Alzheimer's disease can be tough on caregivers, especially when difficult behaviours like aggression or wandering occur. Alzheimer's is the most common cause of dementia, a general term for memory loss and other cognitive abilities serious enough to interfere with daily life. Caregivers of Alzheimer's patients may find their loved ones acting in unfamiliar, even disturbing or violent ways. Ca ...

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ESP8266 based e-paper WiFi weather station

I’m a fan of all kind of weather stations. When Daniel Eichhorn twittered about his new version using an E-Paper display module, I immediately preordered one. I decided to build a station with a custom enclosure, so here is my version of a 3D printed version, featuring magnets so it can be attached to the fridge: Using e-paper for a weather station is an ideal solution, as the data does not need to be updat ...

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Smart Plastic Container

A special container for store objects, iot-ready. It is able to keep track of stocks stored inside and notify when stocks are low! Things used in this project Hardware components SparkFun hx711 × 1 Adafruit Standard LCD - 16x2 White on Blue × 1 Arduino MKR1000 × 1 LED (generic) × 1 Hand tools and fabrication machines Soldering iron (generic) Story A special container for store objects, with sensors inside, ...

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Making the Electronics for CDM324 – 24GHz Doppler Motion Sensor

The Doppler Effect I'm sure you're quite familiar with the Doppler effect: you send an RF signal at a given frequency to a target, and if this object/person is moving the reflected signal's frequency will be shifted. This is the reason why a fire truck's siren has a higher pitch when the truck is going towards you than when it is going away. The CDM324 / IPM165 Motion Sensor You may recall the article I wro ...

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Optical Theremin Musical Instrument Using Arduino Uno Board

Theremin is an early electronic musical instrument controlled without physical contact by the thereminist (performer). It is named after the Russian inventor, Léon Theremin, who patented the device in 1928. A typical theremin musical instrument is shown in Fig. 1. This article explains how you can build an optical theremin using an Arduino Uno board and some readily available components. Etherwave Theremin ...

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BATTLE TESTED CURRENT LIMITER FOR CHEAP DC MOTOR CONTROLLERS

Running a brushed motor in muddy or dusty environments takes a toll on controllers, with both heavy back EMF and high stall currents. This explains one of the challenge in Europe’s Hacky Racer series, which is decidedly more off-road than America’s Power Racing Series. In pushing these little electric vehicles to the limits, many builders use brushless Chinese scooter motors since they’re both available and ...

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NEED WIFI 5 AND BLUETOOTH 5? THEN TRY OUT UNISOC UWP5661

WiFi 5 also known as 802.11ac has been around for a while now, but few boards have adopted it. The WiFi 5 might easily be confused with the general WiFi (802.11 b/g/n).  The WiFi standard 802.11ac is capable of 1300 megabits per second (Mbps) which is the equivalent of 162.5 megabytes per second (MBps), this is 3x faster than the typical 450Mbps speed attributed to 802.11n. So obviously WiFi 5 promise so mu ...

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Smart City Project

Open source air quality sensor network platform. Things used in this project Hardware components Arduino MKR1000 × 1 PMS5003 dust sensor × 1 Breadboard (generic) × 1 Male Header 40 Position 1 Row (0.1") × 1 SparkFun Snappable Protoboard × 1 Software apps and online services Snappy Ubuntu Core Arduino IDE Digital Ocean It's a hosting service that provides online space for website Fritzing Arduino Web Editor ...

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