1) Connect the battery.

2) Press the switch 1 for the battery to be connected to the circuit.

3) Press the switch 2 for input A and switch 3 for input B.

The switch in ON state is and the switch in OFF state is .

4) The LED does not glow if any one or both the switches (2 and 3) are OFF and glows only if both the switches (2 and 3) are ON.

The LED in OFF state is and the LED in ON state is .

Experiment to perform AND gate on kit

Switch 2 (A)

Switch 3 (B)

Resistor 3

npn transistor Q1

npn transistor Q2

AND gate using Resistor-Transistor Logic(RTL)

Resistor 1

Resistor 2

LED

Resistor 4

Switch 1

Battery
+
-


Specifications:
1. Battery = 5V
2. Resistance R1 & R2 =5 kohm, R3 & R4= 10 Kohm
3. Transistors Q1 & Q2 = NPN 2N3904