Using the 433MHz RF Transmitter and Receiver with Arduino

Introduction While building microcontroller based projects, there are occasions where communication will be required between two devices, either in a duplex/transceiver based operation (where both devices can transmit and receive at the same time) or in a simplex-based operation where communication is one way (Receiving device cannot transmit and the transmitting device cannot receive). Several options exis ...

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Communication Between Two Arduinos Using NRF24L01

While building Arduino or any other microcontroller platform project over time the need will arise to establish communication between two of the Arduino boards or microcontrollers for data exchange and/or control. This communication could be achieved using either wired or wireless process. For wireless communication between devices, quite a number of options exist including WiFi, GSM/GPRS, Bluetooth, R ...

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Peggy – Arduino Portable RF Rain Tracker

My country mild climate lets the sun to shine for the greatest part of the year, then tumble driers are not widely used and so we often use to drain clothes in the sun. What to do when a sudden rainfall comes? This project has been made for anyone drain clothes in the sun or, simply, needs an alert when it starts to rain. "Peggy" project is a simple portable rain traker that uses a rain sensor, 433 Mhz tran ...

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Arduino Assisted RC Truck/Car

Recently I dusted off my 7 year old Stampede 2wd, designed in 1996. I got it for my 8th birthday. The truck was great, but it had a few caveats. For example, if the truck ran out of range, battery was low, or the transmitter batteries died on you, the truck would keep the throttle on the last position. Thanks to this accidental cruise (out of) control (See what I did there? 0_o), I accidentally drove m ...

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A Levitating Sphere Rotates Glows and Blinks With Arduino

A levitating little Death Star in Instructables invited me to the new project with Arduino. Three policies were decided and kept to differentiate it from the forerunner. Do it myself with no (or less) ready-made.Keep rotating.Make glow and blink without battery.VIDEO(1): A Levitating Sphere Rotates Glows and Blinks https://youtu.be/nOx0rIQFgoY The detail of the project is described below. Let’s wrap co ...

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WattUp – RF based Wireless Charging at a Distance

Recently, many big companies such as Samsung have developed wireless chargers which work by induction. These chargers usually consist of a station which needs to be in contact with the device in order to charge. The station defeats the purpose of being able to move and walk while still charging the device. Energeous, a global leader in RF- based wireless charging, created the award-winning device WattUp in ...

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Motorcycle helmet signalling light system created using Arduino

Motorcyclist Adnan Khan has decided to use a little Arduino programming and microcontroller hardware to create helmet signalling lights that are linked to the indicators on his motorbike providing other road users with plenty of notification on what is next manoeuvre will be. Watch the demonstration video below to learn more about the project which uses an Arduino Uno integrated into the motorbike signallin ...

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Teardown and experiments with a Doppler microwave transceiver

I got a couple of Microsemi’s C900502 10.525 GHz X-band Doppler radar motion sensors a while ago. This batch was made in UK and had “UK patents 2243495 and/or 2253108 apply” printed on the case. I have seen a teardown of an HB100 Doppler radar module before and was wondering if I this one is any different inside. The C900502 transceiver has a very sturdy metal casing. It is measured at roughly 5cm by 5cm by ...

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Arduino 433Mhz RF Wireless Data Transfer

The most practical and cool way of sharing data from 1 Arduino to another is by far using a radio transmitter and receiver. The simplest form of wireless transmission (I could find) is the 433Mhz ASK modules. They come in pairs, a receiver and a transmitter. They are ridiculously cheap, selling at $1 or less a pair!! These modules provide simplex 1 way data transmission, in order to get a 2 way communicatio ...

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Puck.js – The Ground-Breaking Bluetooth Low Energy Beacon

Puck.js is a low energy smart device which can be programmed and debugged wirelessly with JavaScript. It is both multi-functional and easy to use.  This beacon uses a custom circuit board with the latest Nordic chip, Bluetooth LE, Infrared transmitter, NFC, magnetometer, temperature sensor, RGB LEDs, and much more. Unlike other beacons, Puck.js comes with the open source JavaScript interpreter Espruino pre- ...

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DIY Six Channel Arduino RC Transmitter

It’s wasn’t so long ago that RC transmitters, at least ones worth owning, were expensive pieces of gear. Even more recently than that, the idea of an RC transmitter running an open source firmware would have been considered a pipe dream. Yet today buying cheap imported transmitters and flashing a community developed firmware (if it didn’t come with it pre-installed to begin with) is common place. It’s not m ...

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Wireless temperature and humidity monitor for baby’s room

This project describes a DIY wireless temperature and humidity monitor for kids’ or infant’s room using the Arduino platform, and inexpensive and easily available ASK transmitter/receiver modules. On the transmitting end, an Arduino nano senses the ambient room temperature and humidity using the DHT22 sensor and transmits the data to a receiving end Arduino over a 433 MHz ASK RF link. The receiving side Ard ...

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