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paper_bits:pb704_raspi-bit [2017/11/24 16:52] admin [DAC] |
paper_bits:pb704_raspi-bit [2020/06/11 22:13] |
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- | ===== Raspberry Bit ===== | ||
- | a Raspberry Pi Zero board. | ||
- | ---- | ||
- | ==== Schematic ==== | ||
- | <html> | ||
- | <a href="https://cdn-learn.adafruit.com/assets/assets/000/028/850/original/raspberry_pi_audio.png?1449170282"> | ||
- | <img src="https://cdn-learn.adafruit.com/assets/assets/000/028/850/original/raspberry_pi_audio.png?1449170282"></a> | ||
- | </html> | ||
- | |||
- | <html> | ||
- | <a href="http://www.softwaresamurai.org/wp-content/uploads/2017/10/rpiZ-GPIO.png"> | ||
- | <img src="http://www.softwaresamurai.org/wp-content/uploads/2017/10/rpiZ-GPIO.png"></a> | ||
- | </html> | ||
- | |||
- | <html> | ||
- | <a href="https://people.ece.cornell.edu/land/courses/ece4760/FinalProjects/s2003/gsh7/ECE476/DAC0808.gif"> | ||
- | <img src="https://people.ece.cornell.edu/land/courses/ece4760/FinalProjects/s2003/gsh7/ECE476/DAC0808.gif"></a> | ||
- | </html> | ||
- | ---- | ||
- | ==== change the PWM audio pins ==== | ||
- | [[https://www.raspberrypi.org/documentation/configuration/pin-configuration.md]]\\ | ||
- | [[https://www.raspberrypi.org/forums/viewtopic.php?f=91&t=86609]]\\ | ||
- | [[https://www.raspberrypi.org/forums/viewtopic.php?f=44&t=39138]]\\ | ||
- | |||
- | Or like on [[https://othermod.com/raspberry-pi-zero-audio-circuit/]]\\ | ||
- | Open: | ||
- | $ sudo nano /boot/config.txt | ||
- | Add: | ||
- | dtoverlay=pwm-2chan,pin=18,func=2,pin2=13,func2=4 | ||
- | |||
- | ---- | ||
- | ==== DAC ==== | ||
- | DAC0808: [[http://www.ti.com/lit/ds/symlink/dac0808.pdf]]\\ | ||
- | MC1408: [[http://pdf.datasheetcatalog.com/datasheet/philips/MC1408-8_3.pdf]]\\ | ||
- | Example: [[https://people.ece.cornell.edu/land/courses/ece4760/FinalProjects/s2003/gsh7/ECE476/archive.htm]]\\ | ||
- | |||
- | ---- | ||
- | ==== Pure Data ==== | ||
- | **PD WiringPi**\\ | ||
- | [[https://sourceforge.net/projects/pdwiringpigpio/]]\\ | ||
- | **pdwiringPi**\\ | ||
- | [[https://github.com/garthz/pdwiringPi]]\\ | ||
- | |||
- | ---- | ||
- | ==== Links ==== | ||
- | [[https://learn.adafruit.com/introducing-the-raspberry-pi-zero/audio-outputs]]\\ | ||
- | [[https://othermod.com/raspberry-pi-zero-audio-circuit/]]\\ | ||
- | |||
- | |||
- | ---- |