Just a test
Moderators: adafruit_support_bill, adafruit
Please be positive and constructive with your questions and comments.
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- Posts: 5
- Joined: Mon Mar 18, 2013 11:44 pm
Just a test
just testing this out. [adafruits-raspberry-pi-lesson-11][/http://learn.adafruit.com/adafruits-ras ... g/overview] to see if it shows up like expected...
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- Posts: 5
- Joined: Mon Mar 18, 2013 11:44 pm
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- Posts: 5
- Joined: Mon Mar 18, 2013 11:44 pm
Re: Just a test
Code: Select all
import os
import glob
import time
os.system('sudo modprobe w1-gpio')
os.system('sudo modprobe w1-therm')
base_dir = '/sys/bus/w1/devices/'
device_folder = glob.glob(base_dir + '28*')[0]
device_file = device_folder + '/w1_slave'
def read_temp_raw():
f = open(device_file, 'r')
lines = f.readlines()
f.close()
#lines = ['7b 01 4b 46 7f ff 05 10 ld : crc=ld YES', '7b 01 4b 46 7f ff 05 10 ld t=23456']
return lines
def read_temp():
lines = read_temp_raw()
while lines[0].strip()[-3:] != 'YES':
print(lines)
time.sleep(0.2)
lines = read_temp_raw()
print(lines)
equals_pos = lines[1].find('t=')
if equals_pos != -1:
temp_string = lines[1][equals_pos+2:]
temp_c = float(temp_string) / 1000.0
temp_f = temp_c * 9.0 / 5.0 + 32.0
return temp_f
def run_temp():
while True:
print(read_temp())
time.sleep(1)
#run_temp()
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- Posts: 3
- Joined: Sun Apr 21, 2013 6:37 pm
8-channel Bi-directional Level shifter
I just got an 8-channel Bi-directional Level shifter and was wondering how to connect it. I'm not sure if I have to connect both the Vcca to 3.3 volts and Vccb to 5 volts at all times in order to convert my INPUT signals of 5V to 3.3V.
- adafruit_support_rick
- Posts: 35092
- Joined: Tue Mar 15, 2011 11:42 am
Re: Just a test
@eddie - this isn't the right forum for asking a question. I only found your post because I was checking for spam. In the future, you should post in one of the product support forums.
To answer your question, you have to connect have 3.3V and 5V connected at all times. You also need to connect OE to Vcca to enable the chip.
To answer your question, you have to connect have 3.3V and 5V connected at all times. You also need to connect OE to Vcca to enable the chip.
Please be positive and constructive with your questions and comments.