This Circuit can compare the Light level in an area. It uses a PN Photodiode as the light sensor and IC CA3140 as voltage comparator. The circuit is ideal as the front end of burglar alarm circuits.

The TSL25911 contains two integrating analog-to-digital converters (ADC) that integrate currents from two photodiodes ... image shows the circuit diagram for interfacing the TSL25911 ambient light ...

Because you control the frequency of the modulation signal, you can use the same clock to synchronously demodulate the received light. The circuit of Figure 10 is a very simple synchronous demodulator ...

We all want our home appliances to be controlled automatically based on some conditions and that's called Home automation. Today we are going to control the light based of darkness outside, the light ...

Linear light sensor ... while Arduino averaging the data. The Pascal side of the code is really small because Arduino does all the work and math. The software has been tested for errors, stability and ...

But a common transparent LED can also be used in the place of an LDR or a photodiode. Here is a simple circuit that uses a transparent red LED as the light sensor that switches on a white LED when the ...

Sensors or transducers convert the physical world of light, pressure ... The following three circuits illustrate the use of the digitally controlled potentiometer in sensor circuits. In a photodiode’s ...

Heartrate monitoring based on photodiode sensor and Arduino. Uses Processing for user interface. This was mini project for Electronics Instrumentation 2014 class in FMIPA Universitas Gadjah Mada.

Abstract: The presented integrated optical distance measurement sensor works on the time-of-flight principle. The distance information is obtained from the correlation of received light and the ...