Interface board

To build interface hardware , you need components listed below.

Assemble them according to interface layout.

Components list:

1- Op-Amp LM324 (1Piece)

2- Resistor 100kΩ ( 2 pieces)

3- Resistor 1kΩ ( 4 pieces)

4- Capacitor 104 (= 100nF) ( 1 piece)

5- 4-Pole male Audio Jack ( iPhone headset jack)

Interface layout

iPhone jack pinout:

Ardunio Mega connection:

Pin 5V : Vcc

pin GND : Ground

Pin 15 : RXD

Pin 16 : TXD

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