Connect the 2N2222 transistor to the pin3 of the Arduino with a resistor connected to the base of the transistor and collector terminal to the 5V of Arduino Uno. Connect a small bulb between the ...

NPN Transistor Switching Circuit Diagram . Now as you see in the circuit diagram below, we made a voltage divider circuit using LDR and 1 mega ohm resistor. When there is light near the LDR, its ...

Operation of this 2-way Motor Control circuit is simple. Both pins( 2 , 3 ) of Arduino will remain always high. When no pushbutton is pressed: In this case no current flows to the base of transistor, ...

12 - Arduino Nano Motor Driving with BD139 Transistor. 13 - Transistor Driver Circuit Using 547 and BD139. 14 - Read switch and Buzzer simulation with and Without Arduino nano. 15 - PIR Sensor ...

Arduino Uno Transistor Tester This project is inspired by ArduTester V1.13: The Arduino UNO Transistor Tester , in fact, hardware is the same and schematic is almost identical. Why?

Arduino based Fire Alarm – Circuit and Working. Fig. 2 presents the circuit diagram for the fire alarm using a flame sensor and Arduino Nano. ... which is controlled by a 12V SPDT relay. Transistor T2 ...

All the circuits we worked with in the previous article had the transistor’s emitter taken to ground, took their input from the base, and their output from the collector.

Complete circuit diagram, component list ... the project by adding a display and automatic motor on-off control then you can simply add a microcontroller like Arduino to sense the water changes and ...