Function Generator, capacitance and inductance meter

This site contains complete schematics and code for a 68HC11 based frequency counter, square wave synthesizer, sine wave synthesizer, programmable filter, capacitance and inductance meter, with a digitalker speech synthesizer output. Project specifications are given below.

The project outlined involves a series of interconnected electronic devices based on the 68HC11 microcontroller, which serves as the central processing unit (CPU) for various functionalities. The frequency counter is designed to measure the frequency of input signals accurately, employing a timer/counter module within the 68HC11 to capture pulses over a defined period. The output can be displayed on a digital readout or transmitted to a computer for further analysis.

The square wave synthesizer generates square wave signals at selectable frequencies, which can be utilized in various applications such as testing and signal processing. The sine wave synthesizer complements this by producing smooth sine wave outputs, essential for audio applications and signal analysis. Both synthesizers leverage digital-to-analog conversion techniques to create precise waveforms.

The programmable filter is a critical component, allowing users to define the frequency response characteristics for signal conditioning. It can be implemented using operational amplifiers and passive components, with the 68HC11 controlling the filter parameters through digital inputs.

Additionally, the capacitance and inductance meter provides measurement capabilities for passive components, utilizing the microcontroller's analog-to-digital converter (ADC) to interpret voltage changes corresponding to component values.

The integration of a digitalker speech synthesizer output adds an innovative feature, enabling vocal output of measurement results or system status. This is achieved through a dedicated speech synthesis chip interfaced with the 68HC11, allowing for clear and intelligible audio feedback.

Overall, this project presents a comprehensive platform for exploring and implementing various electronic measurement and signal processing techniques, with the 68HC11 microcontroller at its core, facilitating a wide range of educational and practical applications in electronics.This site contains complete schematics and code for a 68HC11 based frequency counter, square wave synthesizer, sine wave synthesizer, programmable filter, capacitance and inductance meter, with a digitalker speech synthesizer output. Project specifications are given below. 🔗 External reference