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Four-channel High-current DC Fan and Pump Controller PCB pattern (PDF download) [05108181] PDF with the PCB design for the Four-channel DC Fan/Pump Controller (double-sided). Note that due to the size and the number/location of the vias, it would be impractical to etch this yourself. The file is provided as a reference only. Both layers are in a single PDF. Cat No SC4821. Price: Free Files: Four-channel High-current DC Fan and Pump Controller PCB (05108181).pdf (25.3KB) Related to: Project: Low-voltage, high-current DC Motor Speed Controller (October 2018 [print issue] [online issue]) Project: Low voltage DC Motor and Pump Controller (Part 2) (December 2018 [print issue] [online issue]) Other items relevant to these projects: Four-channel High-current DC Fan and Pump Controller PCB [05108181] ($5.00) PIC16F1459-I/SO programmed for the Four-channel High-current DC Fan & Pump Controller (0510818A.HEX) ($10.00) Firmware for the Four-channel High-current DC Fan & Pump Controller (0510818A.HEX) (Free)