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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Drone The Quadcopter

"Drone The Quadcopter" is an featured UAV. I design my project with F450 arm in X-mode design. The full operation takes place via a Flysky FSCT6 remote control unit which gives a better operating range of 800 Meter to 1.2KM. If you are a beginner in this field then you are on the right place. The ultimate goal of our project is to learn aerial vehicles which can be flyover a long height and over a long rang ...

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Doorbell

Connect your door to the Cloud and open it from everywhere. Story The Doorbell is a great example of how to connect your devices to Arduino Cloud and make them talk to each other. The Doorbell allows you to open the door from everywhere as long as a WiFi network is available. The project is composed of two part: the transmitter and the receiver. The transmitter is the one that actually opens the door and it ...

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Ultrasonic Blind Walking Stick Using Arduino

Ultrasonic Blind Walking Stick According to the WHO, about 30 million people are estimated to be permanently blind worldwide. These people are totally dependent on others. They even cannot walk on their own. We have created designed and built an “Ultrasonic Blind Walking Stick” device which will help blind people to walk with ease independently. As a simpler version, we have used only one ultrasonic sensor ...

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Water Level Indicator Using Arduino & Ultrasonic Sensor

Water Level Indicator Using Arduino Wireless Water Level Indicator Using Ultrasonic sensor & Arduino is an amazing and very useful project. The objective of this project is to notify the user the amount of water that is present in the overhead water tank. This project can be further enhanced to control the water level in the tank by turning it ON, when the water level is LOW, and turning it OFF when the ...

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DIY 32ch FPV 5.8ghz LCD

If you’re like me, you don like buying stuff that’s ready-to-go, but rather build one yourself. We usually spend more money, but it’s way more satisfying ? I really didn’t want to buy an overly expensive 32ch FPV LCD receiver, so I made my own DIY 32ch FPV 5.8ghz LCD, that is compatible with EVERY transmitter on the market now. Lets begin! First, crack open that LCD, and look what’s inside. I desoldered the ...

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Hacking home weather station transmitter

Recently I've found this piece of electronic on the dumpster, it was looking interesting - compact case with battery holder, LCD display, temperature and humidity sensor. It has also radio transmitter, but I'm not interested in it since I don't have the receiver station. I decided to bring it back to life. It seems that was previously immersed in water - whole PCB was covered in white stains, in addition ra ...

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Dead Simple Ultrasonic Data Communication

Some of the best hacks are the ones which seem perfectly obvious in hindsight; a solution to the problem that’s so elegant, you wonder how it never occurred to you before. Of course we also love the hacks that are so complex your eyes start to water, but it’s nice to have a balance. This one, sent in by [Eduardo Zola] is definitely in the former group. In the video after the break, [Eduardo] demonstrates hi ...

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