Friends, I now want to make a launch distance can reach 30 meters, use the infinite receiver is mainly is to avoid the infrared electromagnetic interference, so with ir. Need to launch and receiving part, who have this circuit, can pass a up, I searched for a long time without such, what are the launch of very short distances.
The main is launching distance to reach 30 meters. Thank you!
I have also found in BBS in similar diagram, but which is the circuit diagram, infrared headphones reach launch requirements of 30 meters, if any diagram can be sent up next.

 

A complete IR transmitter and receiver circuit schematic was already given to you

look here http://forum.allaboutcircuits.com/showthread.php?t=3483

What more can a person do for you? It is not possible for us to build it for you.

 

Thank you, mainly is still not clear whether that I sent to 30 meters, if the distance is short, reach the requirements.

 

Distance will be a function of LED power and focus(what lens is used on the LED). The IR transmit LED portion of the circuit can be changed to provide more current by using a smaller value resistor, or by using a transistor with more current sinking ability.

Using a focusing lens on the transmit LED and shielding the sides of the receive diode from outside light will give more range.

 

Hello,

Take a look at the ronja project:
http://ronja.twibright.com/

They have a IR connection on 1.4 km.

Bertus