Sun measure sensor


#1

I have some screens connected to VMB2BLE modules but want to make this automatic, by measure the sun light on that side.

I know, there is a velbus meteo station… but that’s overkill, i don’t need wind or rain. All screens are resistent to wind and rain. I only need a little sun measuring sensor.

There is already a VMB7IN in the installation for this, somebody experience with “sun measuring” sensors?

Is only LUX enough? I have also two VMBPIROW connected, these could also measure lux (?).

Somebody experience without the “Up-Down” effect each 5 minutes.
Thanks


#2

Hi

The very easiest and most adjustable solution is the meteo device, but I understand what you’re asking.

I use a really simple LDR sensor via a NPN transistor across the inputs of a VMB7IN to pick up the led pulses on my electricity meter.

With a little playing around with trimming variable resistor at the point of dusk, you might get lucky.

Does that help?

Cheers


#3

The VMBPIRO cannot be used to measure daytime light, they are designed to work in the dusk/dawn range. (In full daylight they will be saturated). The same goes for VMBPIRM and VMBPIRC by the way.