debounced GPIO input (usage as pullup as well as pulldown) inverted GPIO output (to use with standarsd optocoupler) blind and jalousie ... (included stanard interfaces for different polpular Arduino ...

The circuit diagram discussed in this project ... and gives PWM signal output to TRIAC and optocoupler circuit which further drives the AC fan at the desired speed. Learn more about PWM generation ...

4: Block diagram of the receiver side Arduino Uno is an AVR ATmega328P microcontroller ... the 16×2 character LCD to display the value of the measured frequency. MCT2E opto-coupler IC is used to ...

2. 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. The sinusoidal signal whose ...

As shown in the block diagram above, the Coin acceptor module acts as the input device which gives the signal to Arduino when it detects a valid Coin inserted within it. Arduino receives the signal ...

are only loosely related to the 0V and 5V on the Arduino. Opto-isolation is the obvious answer (until TI’s non-opto-isolators are easier to get) to remove ground voltage variations, and that got me ...