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Format Mini Theramin

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Craig Richardson 2018-05-14 17:14:55 +01:00
parent b126b1ad05
commit 566e629611
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Trinket_Gemma_Mini_Theramin/Trinket_Gemma_Mini_Theramin.py
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@ -1,27 +1,30 @@
# Adafruit Trinket/Gemma Example: Simple Theramin
# Read the voltage from a Cadmium Sulfide (CdS) photocell voltage
# divider and output a corresponding tone to a piezo buzzer
#
# Photocell voltage divider center wire to GPIO #2 (analog 1)
# and output tone to GPIO #0 (digital 0)
"""
Adafruit Trinket/Gemma Example: Simple Theramin
Read the voltage from a Cadmium Sulfide (CdS) photocell voltage
divider and output a corresponding tone to a piezo buzzer
Photocell voltage divider center wire to GPIO #2 (analog 1)
and output tone to GPIO #0 (digital 0)
"""
import board
import pulseio
import analogio
import time
import analogio
import board
import pulseio
photocell_pin = board.A1 # CdS photocell connected to this ANALOG pin
speaker_pin = board.D0 # Speaker is connected to this DIGITAL pin
scale = 0.03 # Change this to adjust tone scale
speaker_pin = board.D0 # Speaker is connected to this DIGITAL pin
scale = 0.03 # Change this to adjust tone scale
# Initialize input/output pins
photocell = analogio.AnalogIn(photocell_pin)
pwm = pulseio.PWMOut(speaker_pin, variable_frequency=True, duty_cycle=0)
pwm = pulseio.PWMOut(speaker_pin, variable_frequency=True, duty_cycle=0)
while True: # Loop forever...
# Read photocell analog pin and convert voltage to frequency
pwm.frequency = 220 + int(scale * float(photocell.value))
pwm.duty_cycle = 32767 # 50% duty cycle
time.sleep(0.4) # Play for 400 ms (adjust to your liking)
pwm.duty_cycle = 0 # Stop playing
time.sleep(0.05) # Delay 50 ms between notes (also adjustable)
# Read photocell analog pin and convert voltage to frequency
pwm.frequency = 220 + int(scale * float(photocell.value))
pwm.duty_cycle = 32767 # 50% duty cycle
time.sleep(0.4) # Play for 400 ms (adjust to your liking)
pwm.duty_cycle = 0 # Stop playing
time.sleep(0.05) # Delay 50 ms between notes (also adjustable)