Praveen from CircuitsToday has written up an article on interfacing PIR sensor to 8051 microcontroller: PIR sensors are widely used in motion detecting devices. This article is about interfacing a PIR sensor to 8051 microcontroller. A practical intruder alarm system using PIR sensor and 8051 microcontroller is also included at the end of this article. Before going in […]
Category Archives: sensors
Arduino measures heart beat rate from fingertip
Raj of Embedded Lab writes: The PIC16F628A based heart rate meter is one of the most popular projects published on Embedded Lab. In this article, I am going to show how to replicate the same project using a simpler platform like Arduino. The Arduino heart rate meter will use Arduino Uno, Easy Pulse Plugin, and 4-digit […]
Easy Pulse Plugin, an Arduino pulse sensor
Raj over at Embedded Lab has written an article detailing the new version of their Easy Pulse Sensor: the Easy Pulse Plugin, an Arduino and chipKIT compatible pulse sensor based on Photoplethysmography Today we are happy to announce the release of a new addition to our Easy Pulse Sensor series named Easy Pulse Plugin. Like its predecessors, the original Easy […]
Obstacle sensing walking stick for visually impaired persons
Avinash Gupta wrote an article detailing his smart walking stick project for visually impaired persons This project is designed to guide a visually impaired person to walk and avoid bumping into obstacles. Low cost ultrasonic rangefinders along with a microcontroller is used to measure the distance to obstacles and if they are close enough provide a feedback […]
RainCloud Umbrella Minder v2
Do you always forget your umbrella whenever it rains? No more! Jeremy Blum shows you how to easily make a RainCloud Umbrella Minder: The RainCloud is a web-connected smart umbrella holder. Built around the LittleBits Cloud Bit, the RainCloud allows you to tell with a glance if you need to bring your umbrella with you for the […]
DIY Internet connected smart humidifier
Martin’s DIY Internet connected smart humidifier project: The project uses a DHT22 temperature sensor mounted to the side of the enclosure for better ventilation and reliable reading: I threw in a ultra-cheap I2C OLED status display to get a visual reading. Milling the box so that the OLED shows was pretty nasty, hated it. I […]
Arduino equipped inline sensor skates
Anurag Mishra writes, Recently I bought a new pair of Inline Skates. So an idea struck my mind. I modified my skates to give me some results. I wanted to measure the speed with which I am skating and if I get to know the surrounding conditions, that would be awesome. So, I brought an […]
Flir Lepton thermal imaging sensor + gameduino 2
Andrew Rossignol of The Resistor Network writes: I have successfully implemented a driver for the Lepton module and displayed frames on an LCD. This is all running on an STM32F4 processor on a Nucleo board. Attached to it is a Gameduino 2 which incorporates the FT800 graphics processor. I have implemented my own colorization and […]
Reverse engineering a Verisure wireless alarm
Here’s an informative two-part series of posts over at FunOverIP detailing how to reverse engineer a Verisure wireless alarm. Part 1 details the beginning steps such as finding the modules radio frequency and modulation type, analyzing the chipset datasheet and using GNU Radio.
OV7670 image sensor data capture with Atxmega32E5 without using external FIFO
Kehribar has interfaced a OV7670 camera module with Xmegae5 microcontroller without external FIFO: With current configuration, this system sends 20FPS 80×60 grayscale image data over 3Mbaud serial stream. There is 3 byte preamble {0xAA,0x55,0xAA} to indicate the start of a new image frame. Computer software / other MCU can use those bytes to sync with […]
Automatic plant watering system using AVR(Atmega16) Microcontroller
Here’s an automatic watering system using AVR from Gadgetronicx: Primitive irrigation systems possess many drawbacks as it fails to conserve water and human energy. So introducing Automation in it can help us to overcome these drawbacks and pave way to conserve water. This can be done with a simple Soil moisture sensor and a Microcontroller, AVR […]
Cat protector project
Here’s a cat protector project from LuckyResistor. Check out the project page from prototype to the final device: if you own a cat, you know even if your cat is well brought-up, laws are only valid as long you are at home or even in the same room. the goal of this project was to create […]
Bus Pirate v3 and LM75 temperature sensors
Brixit writes, “This is a tiny reference for reading the temperature with an LM75a temperature sensor and a Bus Pirate v3 on a Linux computer.” Get an assembled Bus Pirate for $30, including world-wide shipping. Also available from our friendly distributors.
The smallest thermal imager
A small thermal imaging sensor from Mike’s Electric Stuff: Info on using the Flir Lepton thermal image sensor used in the Flir One Iphone add-on. See videos for more info. Via Hacked Gadgets. Check out the video after the break.
Using the AS5048A angle sensor
Richard from Zoetrope wrote this blog article about a PCB to make using the AS5048A angle sensor really easy. He used dirtyPCBs for the board, and Zoetrope will be giving a few of them away. Via the contact form.
Sensor modules project
Elpis shared his sensor modules in the project log forum: On the PCB you will find a clear indication for the voltage range, the sensor name for quick searching, the read and write I2C addresses together with the pin out labeling. On top of those, a graphic representation of the sensor measuring values gives a […]
Realtime GPS+GPRS tracking of vehicles using Arduino
Javier from CookingHacks writes: We made a
American pro football using RFID
With the start of the USA’s pro football season the NFL has announced the use of RFID technology to enhance reporting of player performance data. If you want to place bets on your favorite teams, you may explore $1 deposit casino platforms. The conquestador casino website also offers bonuses and big prizes to new players. […]
Tiny ATtiny Node
Tiny ATtiny Node with temperature sensor project at Arduino Praxis: Tiny sensor board with ATtiny84 and RFM12B Transceiver. The size of the PCB is 25 x 30mm, sightly larger than a canadian quarter coin.
PIR sensor
An automatic PIR sensor project by Rajkumar Sharma of Electronics Lab: Project is based on Holteks IC HT7610A, which is a CMOS LSI chip designed for use in automatic PIR lamp, flash or buzzer control. It can operate in 3-wire configuration for relay applications. In our project we have used relay instead of Traic to connect any […]