Unipolar Stepper Motor Driver Circuit
https://www.electronics-lab.com/unipolar-stepper-motor-driver-circuit/
This unipolar stepper motor driver circuit is used to drive a 12V unipolar stepper motor with a current rating of 1.25A. It uses PCA9537 IC, which is a 10-pin CMOS device that provides 4 bits of General Purpose I/O (GPIO) expansion with interrupt and reset for I2C-bus/SMBus applications. It consists of a 4-bit configuration register […]
Using a $2 DS3231 RTC & AT24C32 EEprom from eBay
https://www.electronics-lab.com/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, Amazon, etc. and I eventually bought a couple to try […]
Advanced Datalogger with ATMEGA328, BMP180, DHT22, BH1750 and sd card
https://www.electronics-lab.com/advanced-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 Bmp180 barometric pressure sensor and a BH1750 light sensor. The […]
Home Thermostat With Arduino and LCD
https://www.electronics-lab.com/home-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 With Arduino and LCD – [Link]
Arduino Voltmeter Prototype
https://www.electronics-lab.com/arduino-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 configure it. The smaller […]
Portable Ultrasonic Range Meter
https://www.electronics-lab.com/portable-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 4×20 LCD for ranging distances in meters and inches. Portable Ultrasonic Range Meter – [Link]
AC Solid State Relay
https://www.electronics-lab.com/ac-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 with solid state reliability while providing 4KV isolation from input […]
How to migrate from Microchip to Freescale and Why
https://www.electronics-lab.com/how-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 many options. The main […]
LPG Sensor Alarm
https://www.electronics-lab.com/lpg-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 sensor. A simple circuit with an Op-Amp IC is […]
Fobble – A general purpose Wireless Breakout Board!
https://www.electronics-lab.com/fobble-a-general-purpose-wireless-breakout-board/
Ken Boak has designed a compact board with RFduino Bluetooth Low Energy Module: This week I have been working on another of my standard footprint 50mm x 50mm boards – it is a general purpose wireless module carrier board:- Fobble. That’s a BLE Fob – for anyone who misses the pun. In the last few […]