deba168‘s new instructable is a weather widget: “an application that can be downloaded on your PC, laptop or a mobile device and perform the job of providing easy access to weather information” It’s an ESP8266 based weather display unit which retrieves localized weather information from http://www.wunderground.com by WLAN and displays it on a 128×64 OLED display. […]
Weather Widget using ESP8266 Continue Reading
New Vital Signs Sensor module enables highly accurate, fast and convenient cuffless 24/7 blood pressure, heart-rate (HRM), heart-rate variability (HRV), and electrocardiograms (ECG) measurement New Vital Signs Sensor module enables highly accurate, fast and convenient cuffless 24/7 blood pressure, heart-rate (HRM), heart-rate variability (HRV), and electrocardiograms (ECG) measurement. The new module integrates all necessary hardware
AMS AS7024 VITAL SIGNS SENSOR MODULE Continue Reading
This post is about how to use the BMP180 barometric sensor with the Arduino. It is also applicable for other similar barometric sensors. Introducing the BMP180 barometric sensor The BMP180 barometric sensor (model GY-68) is the one in the following figure (front and back view). It is a very small module with 1mm x 1.1mm (0.039in x
Introducing the BMP180 barometric sensor Continue Reading
For our final project, we designed a 4-channel temperature controller using PID control. The system was designed to monitor and regulate the temperature of four individual channels by applying 120V to heating elements using on/off switching. This switching was indirectly manipulated by the micro-controller using relays. Data was continuously collected from resistive thermal devices (RTD’s)
Four Channel Temperature Controller Continue Reading
My MQTT network at home moves up and down a lot of messages: sensor values, triggers, notifications, device statuses,… I use Node-RED to forward the important ones to PushOver and some others to a Blynk application. But I also happen to have an LED display at home and that means FUN. LED displays are cool.
64×16 MQTT LED Matrix Display Continue Reading
The app allows you to manage traditional air conditioners that are controlled through infrared remotes. Designed for the office environment, the app relies on the ambient brightness (measured by Tibbit #28) to determine whether the aircon should be running or not. In the office setting, no lights = no people = no need for the
Tibbo Project System-based Aircon Controller Application Continue Reading
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
Wireless temperature and humidity monitor for baby’s room Continue Reading
The accuracy of any circuit or system that uses a thermocouple to determine the temperature of a process is limited by the accuracy of the method used to perform cold-junction compensation. In a thermocouple measurement, two wires of dissimilar metal join together at the “hot,” or measurement, junction. The isothermal termination of the thermocouple wires
Circuit provides cold-junction compensation Continue Reading
Designers often use thermistors rather than other temperature sensors because thermistors offer high sensitivity, compactness, low cost, and small time constants. But most thermistors’ resistance-versus-temperature characteristics are highly nonlinear and need correction for applications that require a linear response. Using a thermistor as a sensor, the simple circuit in Figure 1 provides a time period
Temperature-to-period circuit provides linearization of thermistor response Continue Reading
CO2 Monitoring is mandatory in many workplaces and it affects two of my clients directly in Barrel Halls where wine is stored and aged in temperature and environmentally controlled areas. The table below shows the affects of various concentrations in the air. 250-350ppm Normal background concentration in outdoor ambient air 350-1,000ppm Concentrations typical of occupied indoor
CO2, temperature and humidity monitor Continue Reading
