#概要
arduinoでAMラジオを鳴らしてみた。
#写真
#サンプルコード
#include "avr/pgmspace.h"

#define CLOCK		(1000000/8)
#define UA			1
#define SILO		2
#define DO			3
#define DOSH		4
#define RE			5
#define RESH		6
#define MI			7
#define FA			8
#define FASH		9
#define SO			10
#define SOSH		11
#define LA			12
#define SIFL		13
#define SI			14
#define DOHI		15
#define DOHS		16
#define REHI		17
#define REHS		18
#define MIHI		19
#define FAHI		20
#define FAHS		21
#define END			0x00
#define OFF			0x01
#define T03			3
#define T06			6
#define T09			9
#define NOTE		32
int radioPin = 11;
const unsigned char musicData[] PROGMEM = {
	DO, T03,
	FA, T03,
	FA, T09,
	FA, T03,
	MI, T03,
	RE, T03,
	DO, T03,
	RE, T09,
	DO, T03,
	DO, T03,
	UA, T03,
	DO, T03,
	RE, T06,
	RE, T03,
	RE, T03,
	RE, T03,
	FA, T03,
	RE, T03,
	MI, T06,
	UA, T03,
	OFF, T03,

	UA, T03,
	DO, T03,
	RE, T06,
	RE, T03,
	FA, T03,
	SO, T06,
	FA, T03,
	MI, T03,
	FA, T06,
	MI, T03,
	RE, T03,
	RE, T06,
	DO, T03,
	RE, T06,
	RE, T03,
	RE, T03,
	LA, T03,
	FA, T03,
	LA, T03,
	SO, T09,
	OFF,T03,

	DO, T03,
	FA, T09,
	FA, T03,
	FA, T03,
	MI, T03,
	RE, T03,
	DO, T03,
	RE, T09,
	DO, T03,
	DO, T03,
	UA, T06,
	DO, T03,
	RE, T03,
	RE, T06,
	RE, T03,
	RE, T03,
	FA, T03,
	RE, T03,
	MI, T03,
	UA, T06,
	OFF, T03,

	UA, T03,
	DO, T03,
	RE, T06,
	RE, T03,
	FA, T03,
	SO, T06,
	FA, T03,
	MI, T03,
	FA, T06,
	MI, T03,
	RE, T03,
	RE, T06,
	DO, T03,
	RE, T06,
	RE, T03,
	RE, T03,
	LA, T03,
	FA, T03,
	LA, T03,
	SO, T09,
	END,T03
};
void playTone(byte tone, byte tempo)
{
	int i,
		hz,
		itone;
	switch (tone)
	{
	case UA:
		hz = 466 / NOTE;
		itone = ((int) (CLOCK / 466)) << 3;
	break;
	case SILO:
		hz = 493 / NOTE;
		itone = ((int) (CLOCK / 493)) << 3;
	break;
	case DO:
		hz = 523 / NOTE;
		itone = ((int) (CLOCK / 523)) << 3;
	break;
	case DOSH:
		hz = 554 / NOTE;
		itone = ((int) (CLOCK / 554)) << 3;
	break;
	case RE:
		hz = 587 / NOTE;
		itone = ((int) (CLOCK / 587)) << 3;
	break;
	case RESH:
		hz = 622 / NOTE;
		itone = ((int) (CLOCK / 622)) << 3;
	break;
	case MI:
		hz = 659 / NOTE;
		itone = ((int) (CLOCK / 659)) << 3;
	break;
	case FA:
		hz = 698 / NOTE;
		itone = ((int) (CLOCK / 698)) << 3;
	break;
	case FASH:
		hz = 739 / NOTE;
		itone = ((int) (CLOCK / 739)) << 3;
	break;
	case SO:
		hz = 783 / NOTE;
		itone = ((int) (CLOCK / 783)) << 3;
	break;
	case SOSH:
		hz = 830 / NOTE;
		itone = ((int) (CLOCK / 830)) << 3;
	break;
	case LA:
		hz = 880 / NOTE;
		itone = ((int) (CLOCK / 880)) << 3;
	break;
	case SIFL:
		hz = 932 / NOTE;
		itone = ((int) (CLOCK / 932)) << 3;
	break;
	case SI:
		hz = 987 / NOTE;
		itone = ((int) (CLOCK / 987)) << 3;
	break;
	case DOHI:
		hz = 1046 / NOTE;
		itone = ((int) (CLOCK / 1046)) << 3;
	break;
	case DOHS:
		hz = 1108 / NOTE;
		itone = ((int) (CLOCK / 1108)) << 3;
	break;
	case REHI:
		hz = 1174 / NOTE;
		itone = ((int) (CLOCK / 1174)) << 3;
	break;
	case REHS:
		hz = 1244 / NOTE;
		itone = ((int) (CLOCK / 1244)) << 3;
	break;
	case MIHI:
		hz = 1318 / NOTE;
		itone = ((int) (CLOCK / 1318)) << 3;
	break;
	case FAHI:
		hz = 1396 / NOTE;
		itone = ((int) (CLOCK / 1396)) << 3;
	break;
	case FAHS:
		hz = 1480 / NOTE;
		itone = ((int) (CLOCK / 1480)) << 3;
	break;
	default:
		hz = 880 / NOTE;
		itone = ((int) (CLOCK / 880)) << 3;
	break;
	}
	for ( ; tempo > 0; tempo--)
	{
		if ((tone == OFF) || (tone == END))
		{
			delay(1000 / NOTE);
		}
		else
		{
			for (i = 0; i < hz; i++)
			{
				pinMode(radioPin, INPUT);
				delayMicroseconds(itone);
				pinMode(radioPin, OUTPUT);
				delayMicroseconds(itone);
			}
		}
	}
	delay(50);
}
void setup()
{
	pinMode(radioPin, OUTPUT);
	digitalWrite(radioPin, HIGH);
	TCCR2A = (1 << COM2A0) | (1 << WGM21);
	TCCR2B = (1 << CS00);
	OCR2A = 8 - 1;
}
void loop()
{
	unsigned int i;
	byte tone,
		tempo;
	i = 0;
	tone = OFF;
	while (tone != END)
	{
		tone = pgm_read_byte_near(musicData + i);
		i++;
		tempo = pgm_read_byte_near(musicData + i);
		i++;
		playTone(tone, tempo);
	}
}
以上。