I bought a strip of green LED lights in HK for my TORO900 and also I decided to build the r/c switch with 4013 IC. It is my first try with SMT technology. PCB draft I realized by excellent free version of EAGLE.
I printed out the PCB by laser printer on glossy paper (base under stickers) and by the iron transferred to board. Then only had to put to etch pool for a few minutes and I could start soldering. I bought a special solder paste for SMT, a special tip of the solder station and of course the SMT components. The first mistake I made was buying some components, the size of the 603. They are so tiny that they fall on the carpet means definitive loss. Another problem is the solder. Keep the component in place during the soldering is really a headache. Without a magnifying glass and precise tweezer you can not do good job.
Finaly I manage to work and r/c switch is in the world. The first version of the printed circuit is too big, I hope after buy a photosensitive PCB, I can make it even smaller.
Installation of lighting on TORO900:
As the main lights I put two 3mm bright LEDs on the edge of the wings and one to center behind the engine. Connect them directly to the battery. Each of the three LEDs has different color to make clear in what direction the aircraft is flying, regardless of signal quality and functionality of the switch. The LED strip is connected by r/c switch. The LED strip is factory equipped with self-adhesive layer, which I used for its attachment to the wing leading edge. I divided the strip into 3 parts, two contains 27 LEDs and third contains 9 LEDs. The shortest part was glued to the bottom of the plan. In-flight it makes an interesting effect like flying arrow.
3 mm bright LEDS I used as the main lights is fully sufficient for normal flying at dusk and at the complete darkness too. Enough talk, watch the video and pictures.