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Simple USB Power Monitor PCB [04104261] The PCB for the Human Comfort Indicator. It's a double-sided PCB with plated through holes, green solder mask and white silkscreen overlay. 44 x 29mm. Cat No SC7644. Price: AUD $5.00 1 Log in to purchase In stock: yes (20 available). Estimated dispatch time: 1-3 days Related to: Project: Simple USB Power Monitor (June 2026 [print issue]) Other items relevant to this project: ATtiny85-20PU programmed for the Simple USB Power Monitor [0410426A.HEX] ($10.00) 0.96in white OLED with SSD1306 controller ($10.00) 0.96in cyan OLED with SSD1306 controller ($10.00) Simple USB Power Monitor short-form kit ($50.00) Firmware for the Simple USB Power Monitor (Free) Simple USB Power Monitor PCB pattern (PDF download) [04104261] (Free)