Circuit Documentation

Summary

This circuit is designed to control an IR transmitter using an Arduino UNO microcontroller. The circuit includes multiple pushbuttons, resistors, a transistor, a LiPo battery, and a rocker switch. The pushbuttons are used to provide input to the Arduino, which then controls the IR transmitter. The circuit is powered by a 3.7V LiPo battery, and the rocker switch is used to turn the circuit on and off.

Component List

1. IR TX

   • Pins: -, +
   • Description: Infrared transmitter used to emit IR signals.

2. Pushbutton

   • Pins: Pin 3 (out), Pin 4 (out), Pin 1 (in), Pin 2 (in)
   • Description: Pushbutton used for user input.

3. Arduino UNO

   • Pins: UNUSED, IOREF, Reset, 3.3V, 5V, GND, Vin, A0, A1, A2, A3, A4, A5, SCL, SDA, AREF, D13, D12, D11, D10, D9, D8, D7, D6, D5, D4, D3, D2, D1, D0
   • Description: Microcontroller used to control the circuit.

4. Resistor (150 Ohms)

   • Pins: pin1, pin2
   • Description: Resistor used to limit current.

5. 3.7V LiPo Battery

   • Pins: +Ve, GND
   • Description: Power source for the circuit.

6. Rocker Switch

   • Pins: 1, 2
   • Description: Switch used to turn the circuit on and off.

7. BC547 Transistor

   • Pins: collector, base, emitter
   • Description: NPN transistor used to amplify current.

8. Resistor (1000 Ohms)

   • Pins: pin1, pin2
   • Description: Resistor used to limit current.

Wiring Details

IR TX

• Pin -: Connected to pin1 of the 150 Ohms resistor and pin D8 of the Arduino UNO.
• Pin +: Connected to the emitter of the BC547 transistor.

Pushbutton 1

• Pin 3 (out): Connected to GND.
• Pin 1 (in): Connected to pin D7 of the Arduino UNO.

Pushbutton 2

• Pin 3 (out): Connected to GND.
• Pin 1 (in): Connected to pin D6 of the Arduino UNO.

Pushbutton 3

• Pin 3 (out): Connected to GND.
• Pin 1 (in): Connected to pin D5 of the Arduino UNO.

Pushbutton 4

• Pin 3 (out): Connected to GND.
• Pin 1 (in): Connected to pin D4 of the Arduino UNO.

Pushbutton 5

• Pin 3 (out): Connected to GND.
• Pin 1 (in): Connected to pin D3 of the Arduino UNO.

Pushbutton 6

• Pin 3 (out): Connected to GND.
• Pin 1 (in): Connected to pin D2 of the Arduino UNO.

Pushbutton 7

• Pin 3 (out): Connected to GND.
• Pin 1 (in): Connected to pin D1 of the Arduino UNO.

Arduino UNO

• Pin D8: Connected to pin1 of the 150 Ohms resistor and pin - of the IR TX.
• Pin D7: Connected to pin 1 (in) of Pushbutton 1.
• Pin D6: Connected to pin 1 (in) of Pushbutton 2.
• Pin D5: Connected to pin 1 (in) of Pushbutton 3.
• Pin D4: Connected to pin 1 (in) of Pushbutton 4.
• Pin D3: Connected to pin 1 (in) of Pushbutton 5.
• Pin D2: Connected to pin 1 (in) of Pushbutton 6.
• Pin D1: Connected to pin2 of the 1000 Ohms resistor.
• 5V: Connected to +Ve of the 3.7V LiPo battery, pin 2 of the rocker switch, and the collector of the BC547 transistor.
• GND: Connected to GND of the 3.7V LiPo battery, pin 1 of the rocker switch, and pin 3 (out) of all pushbuttons.

Resistor (150 Ohms)

• Pin 1: Connected to pin - of the IR TX and pin D8 of the Arduino UNO.
• Pin 2: Connected to pin1 of the 150 Ohms resistor.

3.7V LiPo Battery

• +Ve: Connected to pin 5V of the Arduino UNO, pin 2 of the rocker switch, and the collector of the BC547 transistor.
• GND: Connected to pin GND of the Arduino UNO, pin 1 of the rocker switch, and pin 3 (out) of all pushbuttons.

Rocker Switch

• Pin 1: Connected to GND of the 3.7V LiPo battery and pin GND of the Arduino UNO.
• Pin 2: Connected to +Ve of the 3.7V LiPo battery, pin 5V of the Arduino UNO, and the collector of the BC547 transistor.

BC547 Transistor

• Collector: Connected to +Ve of the 3.7V LiPo battery, pin 5V of the Arduino UNO, and pin 2 of the rocker switch.
• Base: Connected to pin1 of the 1000 Ohms resistor.
• Emitter: Connected to pin + of the IR TX.

Resistor (1000 Ohms)

• Pin 1: Connected to the base of the BC547 transistor.
• Pin 2: Connected to pin D1 of the Arduino UNO.

Documented Code

Arduino UNO Code (sketch.ino)

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}

Documentation (documentation.txt)