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Hey, I plan to follow your circuit but I will be using about 6 meter (7.2 Amp) strip on channel A and 3 meter (3.6 Amp) on Channel B.the location of the two channels are spaced out approximately 8 meters away from each other so I was thinking it would be best if each channel had its own power supply and its own amplifier. Do you agree? Due to this current draw I need to use another power supply and amplifier. My question:1. Using this power amp (https://www.amazon.ca/JOYLAND-Channels-Amplifier-R... would prevent the need for the ULN2003A correct? I cant find a darlington Transistor array with high enough values to accomplish my current requirements. Thanks, great work!