===== Raspi Bit ===== A Raspberry Pi Zero board for the [[paper_bits:paper_bits_main|Paper-Bits]] to rule all GPIOs in Pure Data.\\ {{:paper_bits:pb205_raspi_bit_155332.jpg?600|}}\\ ---- ==== Schematic ====

---- ==== 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]]\\ ---- ==== Negative Voltage Source ==== [[https://www.allaboutcircuits.com/projects/build-your-own-negative-voltage-generator/]]\\ [[http://www.stephenhobley.com/blog/2011/03/28/creating-a-negative-voltage-from-a-positive-one/]]\\ ---- ==== Pure Data ==== **PD WiringPi:**\\ [[http://dernulleffekt.de/doku.php?id=puredata:gpio]]\\ ---- ==== Links ==== [[https://learn.adafruit.com/introducing-the-raspberry-pi-zero/audio-outputs]]\\ [[https://othermod.com/raspberry-pi-zero-audio-circuit/]]\\ ----