LDR theory Question

Which pin of Bolt is the LDR connected to measure the light?

This ans Analog pin A0

Thanks Suman Satick bro

The LDR output is analog, so the output pin of the LDR sensor is always connected to the analog pins of the processors. Here the bolt module has one analog pin A0. So the only possibility to connect the LDR output is connect it to the A0 pin of the Bolt module.

1 Like

Hi @pratyushsaha453 ,
The only pin that can be used for connecting the LDR is pin A0, the only analog input on the bolt module which can sense 1024 voltage levels between 0V-1V, with output ranging from 0 to 1023. Digital pins can only sense if a voltage above a threshold(based on the sensitivity of the pin) is present or not, they can’t measure the exact voltage.

Analog pin A0 is connected

Since LDR is an Analog Sensor and Bolt WiFi Module has only one Analogue pin, we have to choose only the A0 pin.

A0 pin of bolt is connected to measure the light intensity :).Since,output from ldr is analog ,it is connected to an analog pin. There is only one analog pin in our Bolt module.The analog values are then converted into voltages and then to binary by AtoD converter:)

Hi, @pratyushsaha453

LDR means Light Dependent Resistor This pin connecting to A0 the only analog input on the bolt module output range from 0 to 1023.but they Cant measure Exact Voltage.

The A0 pin is used to connect to the gnd of the terminal voltage of 3.2 v so it is better to use at ground zero and to get optimal brightness in LDR

Since the LDR gives out an analog voltage, it is connected to analog pin A0.

A0 pin

Since LDR is an Analog Sensor and Bolt WiFi Module has only one Analogue pin, we have to choose only the A0 pin .