Solar Tracker Circuit Parts List

The parts list below is for the latest version of our solar tracker circuit. The 4558DX op-amp can be replaced by any standard dual 8 pin op-amp with the same pin-out. The transistors are also standard pnp and npn amplifier transistors and can be substituted as required making sure the pin-out is the same.


  • 4558DX General Purpose Op-Amp NTE x-ref
  • D2058/NTE377 NPN Transistor NTE x-ref
  • B601/NTE262 PNP Transistor NTE x-ref
  • Zener Diode - 5.6v (marking 5V6)
  • R1 - 10meg-ohm 1/2W resistor Resistor color codes
  • R2 - 5meg-ohm 1/2W resistor
  • R3 - 20k-ohm 1/4W resistor
  • R4 - 10k-ohm 1/4W resistor
  • 8 LEDs - clear lens GaP green 5mm 40deg digikey.ca

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