LM339 Solar Tracker Circuit Parts List
Many of the components in the following parts list can be substituted with equivalent components such as using a AN6912 comparator instead of a LM339. We use 5mm clear green super bright LEDs with a 40deg viewing angle but any clear lens LED should work for the sensor. 1/4 or 1/2 watt resistors are adequate, fuses should be placed on each rail and a DPDT switch can be used also.
- U1/U2 - LM339 quad comarator
- Q1 - TIP42C Power Transistor
- Q2 - TIP41C Power Transistor
- Q3 - 2N3906 Transistor
- Q4 - 2N3904 Transistor
- R1 - 1meg ohm
- R2 - 1k ohm trim pot
- R3 - 10k ohm
- R4 - 10k ohm
- R5 - 10k ohm
- R6 - 4.7k ohm
- R7 - 2.7k ohm
- C1 - 10n ceramic capacitor
- M - DC motor up to 1amp
- LEDs - 5mm 563nm Hi Green Water Clear