This project is a modification of my previous Bluetooth-enabled LED matrix display project, which used 8×64 monochromatic LED matrix (total 512 LEDs) for displaying scrolling text message. The original project used Bluetooth for display data transfer from a smartphone, but this one now uses Wifi. The display message is sent through web browser to a ESP8266 […]
ESP8266 Wifi enabled 8×64 pixel LED matrix display Continue Reading
The Internet of Things revolution has completely changed the ways in which we use and interact with technology. In the not so distant past, if you wanted to build an advanced-level electronics project from scratch, you needed a fancy degree and access to an expensive lab facility. But now, thanks in part to the democratization
Build Limitless DIY Electronics Projects with This Arduino Starter Kit Continue Reading
Future Electronics has introduced an Arduino-compatible development board which implements contactless temperature measurement and far-field thermal imaging at a resolution of 32×24 pixels. The board may be used as a platform for the rapid development of various new smart system and IoT applications. Potential use cases include: Presence detection and detection of abnormal behaviour to
Rapid development platform for thermal imaging and IR sensing Continue Reading
I built a very simple DIY solar-powered USB charger for my TP-link 10400mAh USB Power Bank. All I needed was a 6V/3.5W solar panel and the TD1410-based 5V buck converter module. I bought both of them on Aliexpress for less than $8. It was one of the easiest projects I built. All I needed to do was to connect
A very simple DIY solar-powered USB charger Continue Reading
Today’s smartphones utilize a wide array of accelerometers, gyroscopes and various other sensors in their designs. Relatively unknown is the barometric pressure sensor, which measures air pressure. These sensors are currently being integrated into premium-grade smartphones, but are also becoming more common in mainstream phones or wearables such as fitness trackers and Internet of Things
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
Makers searching for a project to keep them busy this weekend may be interested in a fantastic DIYwireless charger complete with light effects and “sound sensing sparkle” says its creator Chen on the Hackster.io website. Check out the video below to learn more about the wireless charger which uses a SparkFun Arduino Pro Mini 328 5V/16MHz, RGB LED
DIY wireless charger with a “sound sensing sparkle” 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
How about designing and deploying intelligent machine-learned models onto resource constrained platforms and small single-board computers, like Raspberry Pi, Arduino, and micro:bit? How interesting would that be? This is exactly what the open source Embedded Learning Library (ELL) project is about. The deployed models run locally, without requiring a network connection and without relying on
Running AI on IoT microcontroller devices with ELL Continue Reading
I²C vs SPI Today, at the low end of the communication protocols, we find I²C (for ‘Inter-Integrated Circuit’, protocol) and SPI (for ‘Serial Peripheral Interface’). Both protocols are well-suited for communications between integrated circuits, for slow communication with on-board peripherals. At the roots of these two popular protocols we find two major companies – Philips
