LDR or UV detection circuits.

[cartman007]

Hey Guys.

Im doing a project where I have to be able to detect sunlight one some spots more then others without the spots being to far apart from each other.
Problem is that your usual LDR circuits will when placed in sunlight either go almost short to almost infinite resistance.

Does anybody know of any ICs in existence that can measure sunlight?

Thanks and regards.
Cart

 

[willis...]

Greetings,

I found this part just by doing a quick google search... Si1141
Its a proximity/ambient light sensor from Silicon Labs. They state in the data sheet that

For operation under direct sunlight, the ADC can be programmed to operate in a high
signal operation so that it is possible to measure direct sunlight without overflowing the 16-bit result.

With that being said, you should still be able to use a simple LDR circuit by just sizing your resistors correctly.

Regards,
Willis

 

[Zaphappy]

TI has a line of optical sensors with the amp built in

https://www.ti.com/lsds/ti/sensors/light-sensors-products.page

 

[chuckey]

Use a optical filter.
Frank