This circuit is a Dual Axis solar tracker without Arduino or any other microcontroller, using single IC LM324, By using Transistors BD139 and BD140 we can drive two motors with max. current 3A (for X-Axis and Y-Axis).Parts list:IC1=LM324LDR (4pcs)P1 & P3=Potentiometer 20K (2pcs)P2 & P4=Potentiometer 200K (2pcs)R1 & R2 & R11 &R12=Resistor 10 ohm (4pcs)R3 & R5 & R7 & R10=Resistor 20K (4pcs)R4 & R6 & R8 & R9=Resistor 33K (4pcs)C1 & C3=Capacitor 220uF (2pcs)C2=Capacitor 100nF (2pcs)T1 & T2 & T7 &T8=Transistor BD139(4pcs)T3 & T4 & T5 & T6=Transistor BD140(4pcs)D1 to D9=Diode 1N4007(9pcs)SwitchDC Motor with gearbox (2pcs) 3D stl files: https://mousa-simple-projects.blogspot.com/2019/05/dual-axis-solar-tracker-without.htmlYoutube Video: https://www.youtube.com/watch?v=Q7smbj3Yt3M&feature=push-u-sub&attr_tag=JnymHKRmUAHIJZ75%3A6
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