Hi - you sell many external light sensors, so I'm not sure which one to choose that will be compatible with the CPB. I just need it to measure ambient light.
Thanks!
glenn
External Light Sensor for CPB
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Please be positive and constructive with your questions and comments.
- adafruit_support_carter
- Posts: 29164
- Joined: Tue Nov 29, 2016 2:45 pm
Re: External Light Sensor for CPB
There is already a light sensor on the CPB itself:
https://learn.adafruit.com/adafruit-cir ... rs-3039274
that can be used for ambient light measurement.
Are you also looking for a secondary / external one?
https://learn.adafruit.com/adafruit-cir ... rs-3039274
that can be used for ambient light measurement.
Are you also looking for a secondary / external one?
- gwilcox123
- Posts: 3
- Joined: Wed Mar 29, 2023 3:53 pm
Re: External Light Sensor for CPB
yes, we are looking for a way to place a light sensor some distance from the board. So would need an external unit that could be wired back to the board.
thx!
g.
thx!
g.
- adafruit_support_carter
- Posts: 29164
- Joined: Tue Nov 29, 2016 2:45 pm
Re: External Light Sensor for CPB
In general, you could probably interface with any of these boards:
https://www.adafruit.com/category/61
What kind of distance will there be between the CPB and the sensor location?
Do you have any special requirement for type of light? Like UV, etc?
https://www.adafruit.com/category/61
What kind of distance will there be between the CPB and the sensor location?
Do you have any special requirement for type of light? Like UV, etc?
- gwilcox123
- Posts: 3
- Joined: Wed Mar 29, 2023 3:53 pm
Re: External Light Sensor for CPB
Thanks for your reply! We will place the sensor only a foot or two from the board. Something that would work in a general interior ambient light. It doesn't necessarily have to read UV light.
thx!
g.
thx!
g.
- adafruit_support_carter
- Posts: 29164
- Joined: Tue Nov 29, 2016 2:45 pm
Re: External Light Sensor for CPB
For that distance, any of the I2C based option should work:
https://www.adafruit.com/product/5610
https://www.adafruit.com/product/5591
https://www.adafruit.com/product/4681
https://www.adafruit.com/product/4162
There is a STEMMA QT cable available with alligator clips that would allow connecting to the CPB without any soldering:
https://www.adafruit.com/product/4398
Another option would be to use any of those STEMMA QT cables and strip the wires on one end and attach to the CPB using bolts:
https://www.adafruit.com/product/4103
https://www.adafruit.com/product/5610
https://www.adafruit.com/product/5591
https://www.adafruit.com/product/4681
https://www.adafruit.com/product/4162
There is a STEMMA QT cable available with alligator clips that would allow connecting to the CPB without any soldering:
https://www.adafruit.com/product/4398
Another option would be to use any of those STEMMA QT cables and strip the wires on one end and attach to the CPB using bolts:
https://www.adafruit.com/product/4103
- petespaco
- Posts: 128
- Joined: Thu Apr 19, 2012 7:53 pm
Re: External Light Sensor for CPB
What not simply use product 161, a CdS photo cell? (USD $0.95)
- adafruit_support_carter
- Posts: 29164
- Joined: Tue Nov 29, 2016 2:45 pm
Re: External Light Sensor for CPB
That's another option:
https://www.adafruit.com/product/161
It's a purely analog sensor. But the CPB has analog inputs that could be used to read it. There's a general guide here that shows basic usage:
https://learn.adafruit.com/photocells/using-a-photocell
https://www.adafruit.com/product/161
It's a purely analog sensor. But the CPB has analog inputs that could be used to read it. There's a general guide here that shows basic usage:
https://learn.adafruit.com/photocells/using-a-photocell
Please be positive and constructive with your questions and comments.