Alan Parekh of Hacked Gadgets writes: We all have thermostats in our houses but how often are they in a horrible place? You often want to place the temperature sensor in a different location than the control and display unit. There are lots of models that have remote sensor capability but they come with a […]
ACVoltage wrote this instructable detailing his DIY POV clock using hard disk drive and Arduino Uno: This is a fun project that can be done easily and also cheaply. In this instructable we will explain step by step how to make this beautiful POV clock. Used material: -Arduino Uno, -Tiny RTC modul, -ULN 2003, -IR diode and IR transistor […]
An Arduino rangefinder with an ultrasonic sensor and an I²C interface display by Jan Henrik. He wrote an instructables here: The maximum rated range is 500 cm, the range is measured 20 times per seccond. It is Displayed on a lcd screen which is 20×4 chars big, it has a custom start message, and it can […]
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 […]
Elpis of Embedded Day shared his sensor stick in the project log forum: I just finish the assembly process of my latest super mini project! It’s nothing amazing… but its a very handy sensor module! On board there are three commonly used sensors: SHT10, BMP085 and MPU6050. I was constantly using those ones over my […]
Ray Wang writes: I just wrote a series of three posts about how I reverse engineered a few off-the-shelf wireless temperature, humidity sensors and rain gauge, and used an Arduino to listen to and decode the sensor data. The tools involved are quite simple: an Arduino and a 433MHz RF receiver. I also used a […]
Here’s an application note from Maxim on triple remote temperature sensor: The MAX31730 temperature sensor monitors its own temperature and the temperatures of three external diode-connected transistors. The operating supply voltage is from 3.0V to 3.6V. Resistance cancellation compensates for high series resistance in circuit-board traces and the external thermal diode, while beta compensation corrects for temperature-measurement […]
Boris Landoni from Open Electronics writes: With this short guide we release today, we will explain you how to use your Arduino Yun to do something that was never accomplished before with a board of such family. We’ll face a real embedded project, with its set of sensors and management and control applications. Thanks to […]
Iamzxlee has written an article detailing his colour sensor project: Basically, the sensor consists of three LEDs and Light Dependent Resistor (LDR). The LDR will detect the colour and display it to another RGB LED. Besides display it on the RGB LED, the colour will also display on PC. RGB LED is commonly used in display colours […]
Davide Gironi writes: MH-Z14 NDIR Infrared gas module is a common type, small size sensor, using non-dispersive infrared (NDIR) principle to detect the existence of CO2 in the air, with good selectivity, non-oxygen dependant and long life. MH-Z14 has a PWM output, with a sensitivity range of 0ppm to 2000ppm CO2, an accurancy of ±200ppm. […]
Dhavalis build this Netra project, an ultrasonic eye for the visually impaired: Netra is an eye for visually impaired, a device based on Echolocation principle. It uses Arduino Micro, Ultrasonic sensor and vibrating motor. Vibration of the motor increases with decrease in distance and vibration decreases with increase in distance between device and object in front. […]
Here’s Mats another holiday project the MainSlogger -Voltage and Frequency logger for the mains power: The sensor board is done, working on firmware for the Analyzing/Displaying & Logging board.
An ultrasonic range-finder with haptic feedback called The Bat Hat by Jeff Buswell, Clifford Chou and Andrew Knauss from Cornell University, built as a final project: For our ECE 4760 final project, we designed and implemented an ultrasonic range-finding hat that uses haptic feedback to alert its wearer about obstacles in his or her path. The hat is […]
Ambient Backscatter – Wireless power and communication with no batteries Ambient Backscatter transforms existing wireless signals into both a source of power and a communication medium. It enables two battery-free devices to communicate by backscattering existing wireless signals. Backscatter communication is orders of magnitude more power-efficient than traditional radio communication. Further, since it leverages the […]
Here’s a video by Geva describing how to control microbes with your mind: Paramecia will change their swimming direction in response to an electrical field. With an Ardunio, a hacked brain sensor and a little code you can control your own army of single celled minions with mind power alone. Full build instructions and source […]
Power efficient, adjustable, light-sensitive switch using an LED: You can use an LED as a photoelectric sensor. A previous Design Idea shows that such a switch is highly power-efficient, consuming almost no power (Reference 1). However, you cannot adjust that configuration to switch at the desired light intensity. You can adjust the circuit in this […]
Doub shared his solenoid control project in the forum: I’m working on a solenoid control board, that would allow me to do sensorless position control (the algorithm is based on the varying inductance of the solenoid depending on the plunger position).
Microchip capacitive proximity design guide: This application note describes how to use the Microchip capacitive sensing solution to implement a capacitive-based proximity detector, provide hardware layout guidelines and analyze several factors that can have an impact on the sensitivity.
This web-enabled rain sensor will automatically turn-off an irrigation system when it rains using a Raspberry Pi: This Raspberry Pi Irrigation System Rain Bypass uses a web connected Raspberry Pi to look up rain predictions and disable the irrigation system from watering the lawn if it won’t be necessary. The existing controller has an input […]
Want to adjust TV sound during loud commercials? TechBitar shows you how to easily make an automatic volume control using Arduino: The TV Volume Loudness Guard will listen to your TV and if the volume goes higher than a certain level, it will bring it lower. Via the contact form.