BOM Research

did some BOM research
so far I did the following:

• confirmed K2B (V1.1) and 7” display both work; touch input functional, mounting holes good
• identified Android TV navigation issue (no back button, requires restart, so any hopes of using the stock OS are gone)
• built out the BOM on Notion
• resolved KickPi PDF voltage contradiction confirmed K2B runs 5V (Type-C), not 12V as one table mistakenly stated
• currently i decided on the Waveshare UPS HAT (B) 5V output, dual 18650, I2C monitoring as a UPS module
• found keyboard+touchpad combo, eliminating need for separate trackpad/trackball
• worked out full USB port budget: touch data + keyboard combo fit K2B’s 2 native ports with no hub; hub only needed once OLED is added later
• picked power button: 16mm, self-locking, LED ring, 3-6V, 3A, aluminum alloy