Explore serial communication, PWM, sampling, and error detection.

1. UART Frames

   Turn one character into a start bit, eight data bits, optional parity, and stop bits.

2. I2C and SPI

   Step through the clock and data waveforms of two synchronous serial buses.

3. CRC Calculation (Modbus CRC-16)

   Follow the shifts and XORs that calculate the CRC-16 appended to a Modbus RTU frame.

4. PWM and Duty Cycle

   Explore how on/off digital output controls LED brightness and motor drive through duty cycle.

5. ADC Sampling and Aliasing

   See how undersampling can make a signal appear to have an entirely different frequency.