Using a $2 DS3231 RTC & AT24C32 EEprom from eBay
Edward Mallon @ edwardmallon.wordpress.com gives us a detailed explanation about cheap RTC modules found on ebay and other places. I built the first few beta units with the DS3231 Chronodot from Macetech (about $18 each), but I kept on stumbling across cheap RTC modules on eBay,...
Continue ReadingAdvanced Datalogger with ATMEGA328, BMP180, DHT22, BH1750 and sd card
educ8s.tv has published another great Arduino project. It's a ATMega328 based datalogger able to record temperature, humidity, barometric pressure and light to a SD card. In this video we build an Advanced Data Logger with Arduino. We use a DHT22 temperature and Humidity Sensor, a...
Continue ReadingHome Thermostat With Arduino and LCD
ArisK3 @ instructables.com decided to replace his home thermostat with a DIY one so he build an Arduino based thermostat with big character LCD. Replacing a standard thermostat (SIEMENS-RAA30 16GR) with a self made, arduino-based, big LCD screen is a fun project. Home Thermostat...
Continue ReadingArduino Voltmeter Prototype
Proto G @ instructables.com has build an Arduino based digital voltmeter that is able to measure up to 30V and it's using an OLED LCD display. In this instructable, I'll show you how to make a simple arduino voltmeter. It can measure voltages in excess of 30VDC depending on how you...
Continue ReadingPortable Ultrasonic Range Meter
ManosM @ instructables.com has build a portable ultrasonic range meter based on ATMega328 mcu and LCD display. This device is a small, portable ultrasonic range meter using an ATMega328 microcontroller, an ultrasonic module and a 4x20 LCD for ranging distances in meters and...
Continue ReadingAC Solid State Relay
This simple circuit designed around Solid State Relay S216S02 from SHARP. The S216S02 solid State Relay (SSR) is an integration of an infrared emitting diode (IRED), a Phototraic Detector and a main output Traic. These devices are ideally suited for controlling high voltage AC loads...
Continue ReadingHow to migrate from Microchip to Freescale and Why
Maurizio Di Paolo Emilio has pointed us to this latest article on why to choose Freescale mcu versus Microchip ones: The task of choosing the best micro for an application is not made easier by the multitude of suppliers you have at hand today, this being the drawback of having so...
Continue ReadingLPG Sensor Alarm
sameer @ sgprojects.co.in has build a LPG gas detection circuit based on LM358: LPG gas detection project’s main idea is to implement the security system for detecting leakage of liquid petroleum gas in closed environment. In this project gas leakage is identified by using MQ6 gas...
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