This board also has a comparator Op-amp ... light up some LEDs to show the intensity of the sound received by the microcontroller. The connection of the circuit is also very simple, we have just ...

For this, we need a light sensor to detect ... As per the circuit diagram, we have made a voltage divider circuit using LDR and 100k resistor. The voltage divider output is feed to the analog pin of ...

Circuit diagram of an LED as a light sensor is shown in Fig. 1. It is built around op-amp CA3140 (IC1), transistors BC547 (T1) and BC337 (T2). Fig. 1: Circuit diagram of an LED as a light sensor The ...

This project is a simple temperature monitoring system using an Arduino UNO, a TMP36 temperature sensor, and an Op-Amp 741. The system lights up an LED when the temperature exceeds 30°C.

A TL071 JFET input op amp is used to amplify and buffer this extremely high impedance signal. Circuit diagram: Using LED As A Light Sensor-Circuit diagram Resistor R1 ensures that the op amp "sees" a ...