# Can I make a simple Bluetooth receiver? [closed]

I can control a relay from an Android smartphone using Arduino and Bluetooth as seen here.

However, it seems too costly to be using Arduino and a Bluetooth receiver for driving a switch. As long as Bluetooth is a radio frequency, is it possible to make a simple Bluetooth receiver which can output 1 or 0 to drive a relay? If yes, how tough that is going to be?

The main factor here is the cost, which should be \$1-$5.

• This is not a good question for the robotics SE. The reason being 1) it's not really specific to robotics, rather it's about using bluetooth. 2) it's not well posed, and doesn't show a lot of research. "Since bluetooth is a radio frequency" doesn't make a lot of sense. Bluetooth is a communications protocol (like TCP), which is made to be transmitted over specific radio frequencies. Is your question about the BT protocol, driving a relay, or an arduino solution? – Josh Vander Hook Dec 10 '12 at 21:36
• Your question seems focused on bluetooth specifically, but it sounds like you're really asking for a cheap way to wirelessly control a relay. Is that accurate? – Ian Dec 11 '12 at 1:43
• Yes that's right I didn't do much research, I was just checking the possibilities and feasibility. Yes I am asking for a cheap way to wirelessly control a relay via bluetooth. – ruben Dec 11 '12 at 4:33