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XMega Analog Comparator

Posted on December 5, 2015 by Shawon Shahryiar

Previously we dealt with the XMega Analog-to-Digital Converter (ADC) block. We know that we can use the ADC to measure voltages and take decisions based on voltage values/levels but sometimes it is enough to detect voltage levels and not to measure the exact voltage values. In such occasions where we just need to check voltage levels relative to a reference or threshold value, we need an Analog Comparator (AC). An analog comparator can be used to compare two voltage levels and based on that it can be used to generate a logic output (0 or 1) to indicate which of

STM32 Timers

Posted on December 1, 2015 by Shawon Shahryiar

Everything related to digital electronics is related to time. Timer, counter, frequency, pulse width, clock and time are the most common words one may find in this arena. Microcontrollers just like humans need heart-beats and these come from clock sources. Apart from system clock, timers are clock sources that can be used as heart-beats for various applications. All modern micros are embedded with timer-counter modules and generally they are used for generating time bases, counting pulses, measuring time periods of waveforms, generating pulse width modulation (PWM) signals, triggering external devices and timing special events. STM32 micros have several timers designed

Cyber Monday 2015 Discount Coupon

Posted on November 29, 2015 by R-B One comment

We offer 11% discount on our major products, including pulse sensors, Arduino Uno, power supply board, SPI 7-Segment Displays and Easy Matrix modules. The coupon code is 9398BDD and is valid from Nov 29 through Dec 01, 2015. Easy Pulse Sensor DIY pulse sensor based on principle of photoplethysmography. Designed for hobby and educational applications to illustrate the principle of photoplethysmography (PPG) as a non-invasive optical technique for detecting cardio-vascular pulse wave from a fingertip. The sensor provides analog PPG output as well as digital pulse output which is synchronous with the heart beat. Click here for the deal Easy Pulse Plugin

IoT temperature monitoring device

Posted on November 25, 2015 by R-B Leave a comment

This temperature monitor IoT device uses ESP8266 and DS18B20 to report a remote temperature measurement to a mobile app and also sends an email to the user if the temperature goes below a set threshold. To complete this project you will have to create three things Hardware – Basically you have to hook up the temperature sensor to the ESP8266 board and upload the Arduino code. Cloud device – Create the logic that drives the decision making using the IC2Cloud platform www.ic2cloud.com Mobile App – Create the mobile App using AppInventor to monitor and control your temperature appinventor.mit.edu This project can

ESP8266 controls an AC outlet for lamp

Posted on November 24, 2015 by R-B Leave a comment

Gary shares his ESP8266 controlled on/off switch for a lamp. The first step is to find a case to house the parts in. I had an old TP-link router case that I used. It already had a two prong spring out 110v connections but any box will work. When planning your boxes figure out how your going to get the AC in and out of the box. A stop at your local bigbox hardware store should give you lots of idea. At a minimum a deepwall outlet/switch box will work but use your imagination. My project only uses 2 wire

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