October 2016 ~ Arduino Geek

How to Handle Active Buzzer with Arduino

Sometimes we need an indicator that indicating status of our appliance / system. For some reason the visual indicators can’t be used, for e...

PIR (Passive Infra Red) sensor is used to detect object’s movement in front of it. PIR sensor is made from pyroelectric sensors that can de...

SIM800L is a cheap GSM/GPRS modem that works in four frequency bands, i.e. 850, 900, 1800 and 1900 MHz. Its GPRS technology adopts multi sl...

Analog pins on Arduino board are used as analog input pin as default configuration. In these pin you can detect analog voltage from 0 - 5V ...

I 2 C LCD 16x2 module is controller module for LCD 16x2 which is dealing with I 2 C/IIC ( Inter Integrated Circuit ) synchronous serial p...

RTC DS3231/DS3232 has additional feature to get temperature instead of its main feature, get precision time data. However, the temperature...

If you buy new DS3231/DS3232 RTC module, usually the time stored in internal memory (SRAM) is the manufacturer's default time (US time)...

An RTC ( Real Time Clock ) IC is designed to provide precise time information ranging from seconds, minutes, hours, dates, days, month to y...

AC voltage detector is used as a sensor whether there is a voltage of 220 VAC coming into the circuit (just for detecting, not for measurin...

If you're looking for AC Voltage Detector , maybe optocoupler H11AA1 could be a simple solution. The circuit is fairly simple, fewer...

Build a simple digital thermometer with Arduino is fairly easy. You only need to buy a cheap LM35 temperature sensor and upload sketch (fir...

LCD ( Liquid Crystal Display ) is usually used as a simple display output on a microcontroller system. An LCD can display alphanumeric cha...