Hey and Hello,
I got the info. more suited to abide by actual rules instead of guessing
like I did do earlier in my source.
...
Thank you for the links. I did get some help on Freenode too. I will look
over the links. I have them up now.
Seth
P.S. Here is a setup maybe worth while?
from LDRone import MCP3008
import time
adc = MCP3008(bus=0, device=0, vref=3.3)
try:
while True:
voltage = adc.read(channel=0) # across resistor
current = voltage * 10000 # through resistor
and LDR
resistance = (adc.vref - voltage) / current # of LDR
print("voltage: \t", voltage)
print("current: \t", current)
print("resistance: \t", resistance)
time.sleep(4)
except:
print("Get gone!")
pass
Here is LDRone.py
from Adafruit_BBIO.SPI import SPI
class MCP3008:
def __init__(self, bus, device, vref):
self.vref = vref
self.spi = SPI(bus, device)
def read(self, channel):
data = self.spi.xfer2([1, (8 + channel) << 4, 0])
value = ((data[1] & 3) << 8) + data[2]
return value * self.vref / 1023
def close(self):
self.spi.close()
On Sunday, November 10, 2019 at 6:52:42 PM UTC-6, Dennis Bieber wrote:
>
> On Sat, 9 Nov 2019 21:19:35 -0800 (PST), in
> gmane.comp.hardware.beagleboard.user Mala Dies
> <[email protected] <javascript:>> wrote:
>
> >
> >from LDRII import MCP3008 #I found this source online and I cannot figure
> >out what site I found it at currently. Anyway...if this is your source,
> say
> >so! I will give you credit.
> >
> Based on Google, the MCP3008 is a multichannel ADC. The Raspberry
> Pi
> examples require it because the R-Pi only has binary GPIO.
>
> The BBB has internal ADC (though limited to 1.8V peak, so one
> often
> needs a voltage divider to reduce 3.3V (or 5V) data to fit into 0..1.8V)
> (for safety, one might want to limit the peak to 1.7V, and adjust the
> conversion equation somewhat).
>
> https://www.linux.com/tutorials/how-get-analog-input-beaglebone-black/
>
> https://learn.adafruit.com/setting-up-io-python-library-on-beaglebone-black/adc
>
>
> >
> >from LDRII import MCP3008 #I found this source online and I cannot figure
> >out what site I found it at currently. Anyway...if this is your source,
> say
> >so! I will give you credit.
> >
> Based on Google, the MCP3008 is a multichannel ADC. The Raspberry
> Pi
> examples require it because the R-Pi only has binary GPIO.
>
> The BBB has internal ADC (though limited to 1.8V peak, so one
> often
> needs a voltage divider to reduce 3.3V (or 5V) data to fit into 0..1.8V)
> (for safety, one might want to limit the peak to 1.7V, and adjust the
> conversion equation somewhat).
>
> https://www.linux.com/tutorials/how-get-analog-input-beaglebone-black/
>
> https://learn.adafruit.com/setting-up-io-python-library-on-beaglebone-black/adc
>
> --
> Dennis L Bieber
>
>
--
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