Arduino

Bluetooth 220 V voltage switch

Control a household lamp with your smartphone.

Needed:

• Arduino board
• 5v relay for arduino
• bluetooth modem (https://www.sparkfun.com/products/12577)
• android sdk
• android phone
• jumper wires

connecting blue tooth modem to arduino

Important thing is that your modem supports 5v power. Many boards are built for 3v. Only four wires needed:

• Connect grd on arduino to grd on modem
• Connect 5v of arduio to vcc on modem
• Connect arduino digital pin 2 to tx on modem
• Connect arduino digital pin 3 to rx on modem

Do not use pins on arduino that have a tx and rx printed on them. They are used to communicate with your pc while connected by usb.

connecting relay to your arduino

This is straight forward too:

• Connect grd on arduino to grd on relay module.
• Connect 5v of arduino to vcc on relay module.
• Connect digital pin 13 to Ch1 or In1 on relay module.
• Connect digital pin 12 to Ch2 or In2 on relay module.
• e.c.t.