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 … Read more
Category Archives: sensors
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 … Read more
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 … Read more
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.
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.
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 … Read more
Javier from CookingHacks writes: We made a
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. The NFL partnered with Zebra Technologies, which is applying the same radio-frequency identification (RFID) technology … Read more
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.
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 … Read more
A sound activated switch project by Rajkumar Sharma of Electronics Lab: Clap switch/Sound-activated switch designed around op-amp, flip-flop and popular 555 IC. Switch avoids false triggering by using 2-clap sound. Clapping sound is received by a microphone, the microphone changes … Read more
Ray Wang at Rayshobby has been working on reverse engineering a wireless soil moisture sensor. He writes, “At the Maker Faire this year I got lots of questions about soil moisture, which I knew little about. Recently I started learning … Read more
Ondrej Karas of DoItWireless writes: This article describes temperature and humidity measurement with DHT11 sensor connected to TR module. Circuit diagram is very simple. You need only power supply for sensor and one wire for data line. This line … Read more
Just in time for Summer, here’s a design for a sonic pest repeller. Carla Schroder developed this project which uses an Arduino Uno along with the WAVE shield and a Maxbotix ultrasonic rangefinder. This simple yet reportedly effective design senses … Read more
Sverre Holm writes: Ultrasonic distance sensors can find the range out to 2-4 meters and are popular in e.g. robotics. Here I look at how the accuracy can be improved by compensating for the variation of speed of sound with … Read more
Shabaz over at Element14 writes: This post is about an interesting, low-cost sensor that doesn’t need much processing to use, and has some unique characteristics – a PVDF (polyvinylidene difluoride) Piezoelectric sensor. The sensors looks like a small strip of plastic, … Read more
Here’s a simple cure for your posture and the back pain blues, a posture sensor by Wingman: The simplest distance sensors are ultrasonic or infrared sensors. I went with a SR-HC04 because it is cheap and sufficiently precise. There are no special requirements … Read more
Curiosity killed the cat, but this project only sprays them with water. Tinkernut posted this humorous project useful for animal control in the kitchen. It uses an Arduino/PIR combo to sense motion and activate the auto trigger on a Raid … Read more
Juan Ignacio writes: A while back I bought an HC-SR04. It sat in a box until yesterday when I tried to use it with an MSP430G2553 but unfortunately it wasn’t working. I used Energia to program the Launchpad but I wasn’t … Read more
Emil has written a post on improving the HC-SR04 ultrasonic sensor. Via the contact form.