The circuit diagram of the digital frequency meter is shown in Fig. 3. It consists of Arduino Uno board, optocoupler MCT2E (IC1), 16×2 LCD and a few other components.

Fig. 1: Circuit diagram of millivolt meter The Arduino is the brain of the circuit that calculates the voltage based on the ADC value using the program, which is displayed on LCD1. The voltage at ...

Smart home project using Arduino Uno R4 WiFi ensures safety and convenience with temperature, humidity, light, and gas monitoring. Features remote control, real-time alerts, and customizable options ...

In this project we will develop a tone generator using Arduino Uno. We will have buttons interfaced with the UNO and each one of them generates different intensity of tone. The frequency of tone ...