Sun Switch simple sun tracking electronic device

Step 2 The LEDs

LEDs (Light Emitting diodes) are cheap to purchase or can be found for free in scrap electronics. Many older keyboards have three or four LEDs that can be used for this project. They are usually the 3mm size and are semi transparent but they can be used for a sun switch sensor.

Layout the position of all the LED holes on the sensor housing as per the diagram below. There will be eight rows with three LEDs in each. Four rows of LEDs are connected in parallel and connect to either the east motor drive circuit or the west motor drive circuit. Center punch and drill the 24 LED holes in the sensor housing making sure that each hole is drilled perpendicular to the sensor housing axis and that each set of three holes are aligned parallel to the sensor housing axis. Each row is spaced 43 deg. apart and each LED is spaced .375" apart in each row. The east and west LEDs are separated by 23 deg. Use a proper size drill bit which will allow each lead to be firmly pressed into place. You can simply drill some test holes in a scrap piece of ABS to find the proper drill bit diameter.