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[NOTE:
We are working on Electronic Devices, Voltage, Resistors and other Electronic Parts that may Become HOT due to un-stable current or Wrong Wire Connections..
PLEASE BE CAUTIOUS AND TAKE SAFETY NEEDED PROCEDURES.]

In this Project we will use the BC547 Transistor to build an AND-Gate Circuit on a breadboard, so we will Not use the ADRUINO board.

What we Need

• 2 2Pin Push-Button.
• 1 LED
• 3 Resistors.
• 2 BC547 Transistor.
• 1 BreadBoard. [I am using a small 5x7cm]
• Some Jumper Wires.
• 3V Battery

Connections

• Connect Both BC547 to the BreadBoard.
• Connect Emitter of the First (left) One to the Collector of the second One (Right one). [Use Jumper Wire]
• Connect TWO Push-Buttons to the BreadBoard.
• Connect between each BasePin of the BC547 and Pin1 of each Push-Button using a Resistor1&2 [Pin1 of PushButton1 to Pin1 of Resistor1, Pin2 on the Resistor1 to BasePin of BC547.]
• Connect Pin2 of Push-Button1 to the Pin2 of the Push-Button2.
• Connect the Push-Button2 Pin2 to a Resistor3 Pin1
• Connect the Resistor3 Pin2 to the LED(+)Pin.
• Connect the LED(-)Pin to the First BC547 CollectorPin
• Connect the Battery (+) to the Resistor3 pin2, and Connect the Battery (-) to the Emitter Pin of Second BC547.

Run-Time
The Logic of the AND-Gate is if the BOTH Button are Pressed in same time the circuit will close and the LED turn On.

Here is a GIF clip of Running Time.

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By: Ali Radwani