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Controlling relay switches with an infrared remote

Posted on November 27, 2016 by R-B Leave a comment

The infrared (IR) communication technology, which existed long before WiFi and Bluetooth, is still a key component in implementing major components of a typical home automation system. For example, IR technology is still used in cordless headphones, for intrusion detection in home security systems, and in handheld remotes for controlling home entertainment systems (TV, DVD, soundbox, etc), air-conditioning units, and other household appliances. Because IR technology requires a line-of-sight between the transmitter and receiver units, it can only be used for connecting devices in short range, like in a same room. In one of my previous articles, I wrote about a simple IR

BLACK FRIDAY through CYBER MONDAY 2016 DISCOUNT COUPON

Posted on November 25, 2016 by R-B Leave a comment

We are offering 10% discount on our major products including Easy Pulse sensor sensor series, all MAX7219-based serial LED displays, and RGB matrix panel with driver shield, during Black Friday (Nov 25, 2016) through Cyber Monday (Nov 28, 2016). Visit our Tindie store for details of our products. Use discount code 3F3A209 at checkout.

How to post data to Google sheets using ESP8266

Posted on November 23, 2016 by ANir 90 comments

In the past couple years, the ESP8266 platform has flourished dramatically and emerged as one of the most popular hardware tools among electronics hobbyists and IoT enthusiasts. Packed with a 32-bit RISC CPU running at 80 MHz, a fully integrated WiFi radio with TCP/IP protocol stack, serial peripherals (I2C, SPI, and UART), an ADC channel, and general purpose I/O pins, the ESP8266 is the most integrated and affordable WiFi solution available in the current IoT market space. An ESP8266 hardware, like NodeMCU and ESP-01, can directly interface with sensors using its peripherals and upload the sensor measurements to a local

Bluetooth enabled pedometer design

Posted on November 22, 2016 by R-B Leave a comment

Microchip provides an application note describing a Bluetooth Low Energy (BLE) enabled pedometer example that uses an MSP430F5229 reference pedometer design is a portable electronic device that uses PIC16LF1718, a cost effective 8-bit microcontroller with extreme low power (XLP), the Microchip RN4020 Bluetooth 4.1 Low Energy Module, and the Bosch Sensortec BMA250E digital triaxial accelerometer. The pedometer can be worn on the wrist like a bracelet/watch and the on-board RN4020 BLE module allows the pedometer demo to communicate with a smartphone or tablet on which the user’s exercise progress can be tracked. The pedometer demo is powered by a single 3V coin lithium battery (CR2032). The Microchip pedometer demo uses

Upcycling a vintage film camera with Raspberry Pi

Posted on November 21, 2016 by R-B Leave a comment

Gone are the days of vintage film cameras. If you still have one such camera lying around, you might want to consider upcycling it to a digital camera as a weekend fun project following this instrcutable. The author shows how to convert a 35mm twin-reflex film camera to digital using a Raspberry Pi zero with a camera module connected, a 1.8″ TFT LCD, and a rechargeable USB power bank. The camera also implement a push button for snapping pictures. The hardware setup for this project is simple. The TFT LCD data and control pins directly connect to the I/O pins of the

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