Digital Hearing Aid using MKL02Z16VFG4

This design uses MKL02Z16VFG4, an energy and size efficient microcontroller that serves as the main component of the system. It receives the signals from the sensor and microphone, and then sends the processed signal to the speaker. The system uses two amplifiers, a class AB preamplifier and a class D amplifier, both in small packages as it is desirable for the device. It is also equipped with a sensor using Si1102-A-GM that enables the user to change the volume and frequency with a simple touch. Other components can be added, such as a Bluetooth remote control.

This design is applicable for hearing aids and other sound amplification needs. Its lightweight feature makes it portable for daily usage.