Circuit diagram for the simplest opt.transciever

 

Outside appearance

 

Box inside. only five parts!

 

Circuit diagram for the simplest emitting module

 

To make the unit as small as possible!

 

Resin-molded in short aluminium pipe

 

Insert the pipe to the lens box "Hana-chan". 1km communication is not difficult with this combination.

 

 

Extended version of simple transmission unit using melody chip

 

Current 800mA when pulse-on

 

Wooden lens box

 

 

 

 

Lightbeam projected on the wall of apartment house about 40m from my office

 

Lightbeam projected on the water tank of apartment house about 100m from my office

 

 

 

 

Ultra-high-power LED Luminus Devices PT-54 unit