Hello,
I'm building a light sensor to detect light and give a pulse to the micro-controller
So I used a LDR sensor and I connected one pin to the VCC and the other to the micro-controller so that when it detects light, it short circuits and give 5 volt to the controller and when there is no light, the resistance of the LDR becomes very high and gives zero voltage to the controller.
That is all theortical but when i tried it, I found that when there is no light the LDR gives about 2 volt and i want it to give zero voltage to the controller
the LDR is so sensitive and catches any beam
Is there is anyway to make its sensitivity less than that?
I'm building a light sensor to detect light and give a pulse to the micro-controller
So I used a LDR sensor and I connected one pin to the VCC and the other to the micro-controller so that when it detects light, it short circuits and give 5 volt to the controller and when there is no light, the resistance of the LDR becomes very high and gives zero voltage to the controller.
That is all theortical but when i tried it, I found that when there is no light the LDR gives about 2 volt and i want it to give zero voltage to the controller
the LDR is so sensitive and catches any beam
Is there is anyway to make its sensitivity less than that?