an arduino Leonardo with expanded features using the I2c Bus
 This Arduino redesign is used to showcase my understanding of the I2C Bus built into the Arduino Leonardo. Adding 16 GPIOs, 8 PWM channels, 6 Touch Inputs, a 12-bit ADC, a 16-bit DAC, an Amp meter rated for 5Amps, a Boost converter with additional inverted output, and a Li-ion charger.
This design shown is the 4th attempt and is still a work in progress. Below are recordings of the boards during different tests.