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Add gain example. #24

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Merged
merged 2 commits into from
Feb 4, 2019
Merged

Add gain example. #24

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6b7ea95
Add gain example
caternuson Feb 2, 2019
1b9a1af
omg. final newline. omg.
caternuson Feb 2, 2019
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40 changes: 40 additions & 0 deletions examples/ads1x15_gain_example.py
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Original file line number Diff line number Diff line change
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import time
import board
import busio
#import adafruit_ads1x15.ads1015 as ADS
import adafruit_ads1x15.ads1115 as ADS
from adafruit_ads1x15.analog_in import AnalogIn

# Create the I2C bus
i2c = busio.I2C(board.SCL, board.SDA)

# Create the ADS object
#ads = ADS.ADS1015(i2c)
ads = ADS.ADS1115(i2c)

# Create a sinlge ended channel on Pin 0
# Max counts for ADS1015 = 2047
# ADS1115 = 32767
chan = AnalogIn(ads, ADS.P0)

# The ADS1015 and ADS1115 both have the same gain options.
#
# GAIN RANGE (V)
# ---- ---------
# 2/3 +/- 6.144
# 1 +/- 4.096
# 2 +/- 2.048
# 4 +/- 1.024
# 8 +/- 0.512
# 16 +/- 0.256
#
gains = (2/3, 1, 2, 4, 8, 16)

while True:
ads.gain = gains[0]
print('{:5} {:5.3f}'.format(chan.value, chan.voltage), end='')
for gain in gains[1:]:
ads.gain = gain
print(' | {:5} {:5.3f}'.format(chan.value, chan.voltage), end='')
print()
time.sleep(0.5)