NodeMCU devkit can be flashed with latest firmware using your MAC OS, before you going to start you need to disable the OSX “KEXT SIGNING “ feature. Apple OSX introduce the system integrity protection that disabled the modification system location
Wiring The Laser Transmitter on Photocell with Microcontroller
Another illustration how to build a simple physical intrusion detection with laser and photoresistor (or light-dependent resistor, LDR, or photocell). This guide shows how to wire and build a laser tripwire that triggers an alarm or output when the laser
Wiring the TCRT5000 Reflective Optical Sensor Module
This is the Line Tracking Sensor designed for line following robots. The board has two main components IR Transmitter and IR Receiver in one package named TCRT5000. The TCRT5000 are reflective sensors which include an infrared emitter and photo-transistor in
OLED Voltage Meter on Voltage Divider
Another illustration that demonstrate the uses of Analog to measure the voltage of an external battery and integrate the area under the curve to arrive at the useful capacity of a battery mAH. If you’re going to calculate the desired
Wiring the E18-D80NK Infrared Distance Ranging Sensor
In this illustration we will going to wire the Infrared distance switch, a high-sensitive photoreflector to detect distance function, ranging from 3cm to 80cm. When the infrared emitted by the emitter it will get reflected on a surface blocked it
Make your own sound activated switch on Arduino
In this illustration we will going to wire the microphone module, relay and the Arduino board. These project is compatible on most common microcontroller, the main objective of this project to make a sound activated switch or a clap switch.
Wiring the Soil Moisture with Arduino
In this illustration we will going to wire the Moisture Sensor. These sensor can be used as a soil moisture to detect water level on the soil, if the soil moisture is depleted it will send a signal to HIGH.
Scanning i2C Device Address on Arduino
In this guide we will going to find and detect i2c address on our i2c device. You can scan and find the i2c address used by your devices by find the exact address used by the i2c device for more
Wiring The DS18B20 1-Wire Temperature Sensor
In this illustration we will going to wire the DS18B20 single wire temperature sensor. The digital DS18B20 Sensor provide fairly good accuracy and range of connection. The wire length can be reach up to 100m. The DS18B20 has four main
Wiring the Rotary Encoder with Arduino
In this illustration we will going to test and wire the rotary encoder. Rotary encoder can be counted in the positive direction and the reverse direction during the rotation of the output pulse frequency and the rotation is continuous. Compare
Gas Detection MQ-2 Sensor with Arduino
In this illustration we will wire the GAS SENSOR MQ2 Module, these device is very useful for GAS leakage detection in home or industry it can detect H2, LPG, CH4, CO, Alcohol or Propane. This device is very sensitive and
Wiring the Heartbeat Measuring Sensor on Arduino
In this illustration we will going to wire the heart beat measuring module. This module compose of two devices, the IR LED and the Photo Transistor to detect the pulse of the finger, when the module detect a Heartbeat it