Guitar tuner is project based on STM32F407G microcontroller. Along with guitar preamplifier makes simple guitar tuner, which displays sound measurement on LCD screen.
Project is made up of source code and guitar preamplifier scheme. Microcontroller software was written in C language, using following libraries
Projects realization requires building simple guitar preamplifier:
- 2x resistor 470kΩ
- 1x resistor 25kΩ
- 1x resistor 10kΩ
- 1x resistor 68Ω
- 1x adjustable resistor 250kΩ
- 1x adjustable resistor 2,5kΩ
- 1x capacitor 470nF
- 1x capacitor 220nF
- 1x capacitor 100nF
- 1x capacitor 33nF
- 1x capacitor 10nF
- 1x capacitor 560pF
- operational amplifier uA741
- power supply 12V
- SPST switch
Preamplifier should be built on a prototype board or solder on special tile.
- STM32CubeMX (version 5.2.0)
- System Workbench for STM32 (build 20170314-1500)
Connect LCD display and preamplifier following instructions:
- connect preamplifier output to STM32 PA0 pin
- connect LCD RS pin to STM32 PC14 pin
- connect LCD E pin to STM32 PA1 pin
- connect LCD D4 pin to STM32 PB8 pin
- connect LCD D5 pin to STM32 PB6 pin
- connect LCD D6 pin to STM32 PB4 pin
- connect LCD D7 pin to STM32 PD7 pin
Then, using dedicated IDE, build and install software into microcontroller. After enabling preamplifier and microcontroller tuner will start running.
Copyright (c) 2019 Kamil Tomaszewski and Piotr Kalitka
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
The project was conducted during the Microprocessor Lab course held by the Institute of Control and Information Engineering, Poznan University of Technology. Supervisor: Tomasz Mańkowski