You can control the brightness of these LEDs using variable resistors VR1, VR2 and VR3 respectively. Parts Needed. Arduino UNO board – 1 ; 5mm LEDs Red, Green, Blue – each 1 ; 100K Variable resistor – ...

This is an Arduino-based Proximity Sensor circuit wired using the popular HC-SR04 Ultrasonic ranging module,used here for non-contact object detection purpose. The HC-SR04 module includes ultrasonic ...

LED Indicator: The LED blinks in response to the sensor's detection of an object. The blinking behavior is controlled by the Arduino based on the sensor's output. Circuit Connections: IR Sensor VCC ...

In this Arduino Relay Control Circuit we have used Arduino to control the relay via a BC547 transistor. ... hi i want to light up a 12 volt LED strip and need to use a uln 2003 a and a 6volt relay and ...

Circuit Diagram . Code and Explanation. The complete Arduino code for Automatic LED dimmer is given at the end.. In the below code, we are defining the PWM pin and the variables to be used in the code ...

Arduino IoT Cloud Integration: o Use Arduino IoT Cloud for remote control and monitoring. o Secure communication via a Thing ID and a Device Secret. ESP32: o Acts as the microcontroller and connects ...

After reading all the response to the Arduino KIM emulator thing, I’m staggered by this! In case none of you have ever seen the circuit for a KIM-1, SYM-1 or AIM-1, this is pretty much how we ...

His test circuit uses six 2N2222 transistors to protect the Arduino from excessive current. You can see six red LEDs above which are inline with the base of teach transistor.