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raspberrypipico:raspberrypipico [2021/03/12 13:21]
admin [Programmable I/O] 		raspberrypipico:raspberrypipico [2021/03/25 18:06]
admin [ADC]
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 ==== Pinout ==== ==== Pinout ====
 {{:raspberrypipico:pico-r3-sdk11-pinout.jpg?600|}}\\ {{:raspberrypipico:pico-r3-sdk11-pinout.jpg?600|}}\\
 +// schematic from [[https://www.raspberrypi.org/documentation/rp2040/getting-started/#board-specifications|raspberrypi.org]]//\\
  
 On ADC 04 is a temperature sensor.\\ On ADC 04 is a temperature sensor.\\
Line 68: Line 69:
  
 More sound with [[https://github.com/benevpi/pico_pio_buzz|PicoBuzz]] by benevpi.\\ More sound with [[https://github.com/benevpi/pico_pio_buzz|PicoBuzz]] by benevpi.\\
 +
 +----
 +==== Power ====
 +
 +   VBUS – USB power, 5V
 +   VSYS – power in (2-5V)
 +   3V3 – power out 3.3V, 300mA
 +   3V3_EN – disable internal voltage regulator
 +   RUN – enable, disable or reset
  
 ---- ----
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 one can change the duty cycle, 0 to 65535 one can change the duty cycle, 0 to 65535
   pwm.duty_u16(duty)   pwm.duty_u16(duty)
 +
 +----
 +==== ADC ====
 +The Raspberry Pi Pico has four 12bit analog to digital converter:
 +  ADC_VREF    (voltage reference)
 +  GP28 - ADC2
 +  AGND        (analog ground)
 +  GP27 - ADC1
 +  GP27 - ADC0
 +The fourth ADC is internally wired to a temperature sensor.\\
 +[[https://pico-adc.markomo.me/|Characterizing the Raspberry Pi Pico ADC]] by Mark Omo.\\
  
 ---- ----