Custom Raspberry Pi Interfaces

Chapter 1 title: Introduction * Introduction to the Raspberry Pi 3 and Zero * Why GPIO is important to the Pi * The need for hardware interfaces * What to obtain for use in this book Chapter 2 title: 3V/5V Interfacing * Describe the need for interfacing at different voltages * Understanding the risks of overvoltage * Presentation of 3V to 5V translation solutions * Presentation of 5V to 3V translation solutions Chapter 3 Title: VGA LCD Monitors * Inform reader of the cheap VGA LCD monitor resources through converters * What to look for in a low cost HDMI to VGA converter * Monitor resolutions and how to adjust them to meet VGA requirements Chapter 4 title: I2C LCD Displays * Illustrate the advantages of using a I2C LCD Display * Learn how to interface the display using a low cost I2C adapter * Conversion of a 3.3V I2C to a 5V I2C device * C++ access to the LCD display via the I2C bus Chapter 5 Title: MC14490 and Software Debouncing * Using the MC14490/CD4490 chip, debounce up to 6 input contactss * Example circuit with up to 6 inputs * Perform software debouncing using the principle used by the MC14490 chip Chapter 6 title: PCF8591 ADC * Reading an analog voltage into the Raspberry Pi using the available YL-40 pcb * Introduction to the PCF8591 chip (used on the YL-40) * I2C bus access to the ADC * Reading analog voltages from the PCF8591 ADC * Correcting the YL-40 pcb DAC issue * Creating analog voltages from the PCF8591 DAC * Hacking the YL-40 to change the I2C address * Extending the voltage range * Repairing the YL-40 temperature sensor * Using the PCF8591 to measure the diode response Chapter 7 Title: Potentiometer Input Controls * Demonstrate how the PCF8591 ADC from chapter 6 can be used with a potentiometer * Examine the MCP3202 ADC chip for more precision (dual 12-bit SPI ADC) * Illustrate the math behind the potentiometer choice What resistance values to choose Determine how the ADC bit count affects potentiometer readings Chapter 8 title: Rotary Encoders * Introducing the Keyes KY-40 rotary encoder pcb * A test setup to check the rotary encoder * Operating the Keyes KY-40 rotary encoder from 3.3V for the Raspberry Pi * C++ Software to read the rotary encoder Chapter 9 title: More Pi inputs with 74HC165 * Learn how to add additional GPIO inputs to your Pi using the 74HC165 chip * Learn how the shift register in 74HC165 operates * How to use GPIOs in software to access the 74HC165 * How to chain shift registers for more inputs Chapter 10 title: More Pi outputs with 74HC595 * Learn how to get more GPIO outputs with the 74HC595 chip * Learn the 74HC595 capabilities affecting outputs * Learn how to use GPIOs in software to access the 74HC595 outputs * Learn how the 74HC595 can be chained to get even more outputs Chapter 11 title: MCP23017 I2C I/O Port Extender * Learn how to wire the MCP23017 chip and configure it with software * Learn how to multiplex with other I2C devices (here we'll access both the MCP23017 I/O extender and the I2C interface for the 2 x 16 LCD display). * Learn how to use the Linux software to access these two peripherals Chapter 12 title: SDR Radio * Introduce the SDR hardware * Build the SDR software (GnuRadio) * SDR operation Chapter 13 title: Hacking GnuRadio * Modify the SDR software to include the use of the Rotary Encoder from chapter 7 * Tentatively modify further the SDR software to add switch/button controls