It's build from 4 x 0603 SMD LEDs. They only need a room about 2,5 mm3.
To make the round tripping light looking more realistic I wrote a program on a PIC12F629. It drives each LED with a PWM signal.
See the "virtual" rotating effect in the video...
Maybe next time I try it with 0402 LEDs ;-)
The Idea behind that project is to build a realistic looking rotating beacon for a small (1:87) police, fire or ambulance car. Normally they use only a single flashing LED.
(The examples on the following link are not build by me! RC Feuerwehrfahrzeug in 1:87 )
And now lets go to my Part... ;-)
Step 1: Make a tiny workbench
First you should solder only one pin. Then bend the chip in the right position and solder one or to other pins to fix the chip.
Be sure that there is one hole of the PCB in the center of the 4 chips. We need this hole later!
Step 2: Insert LEDs
Make sure that the anode from each LED is on the upper side!
Cut 3 small pieces of paper for isolation between the LEDs. (You can see them in the picture)
- 1 x 2mm x 2mm
- 2 x 2mm x 1mm
Step 3: Solder the first wire
Use a very thin isolated copper wire.
Remove the isolation on about 3mm.
Bend a small ring like shown in the first picture.
Put the wire in the middle of the 4 SMD LEDs and place the ring on top. (Sorry no picture before soldering.)
Solder fast and carefully all 4 LEDs and the wire ring together. (second picture)
Now you can remove the 4 LEDs out of the "tiny workbench". (third picture)