U1 24C02Cx-x-MNY 2-Kbit (256 x 8-bit) I2C Serial EEPROM, chip address inputs (A0, A1, A2), write-protect pin (WP), 4.5..5.5V supply, WDFN-8 (WSON-8, Microchip's 8-Lead TDFN) U2 AP2112K-3.3 600mA low dropout linear regulator, with enable pin, 3.8V-6V input voltage range, 3.3V fixed positive output, SOT-23-5 U3 AP2112K-1.8 600mA low dropout linear regulator, with enable pin, 2.5V-6V input voltage range, 1.8V fixed positive output, SOT-23-5 U4 RP23534A A microcontroller by Raspberry Pi, dual CPU architecture (ARM Cortex-M33 / RISC-V Hazard3), 150MHz, no flash, 520KB SRAM, 12 PIO state machines, VQFN-60 U5 CH382L C1 100u Unpolarized capacitor C2,C3 34p Unpolarized capacitor C4,C14,C15 10u Polarized capacitor C5-C7,C9-C13,C16,C26,C28-C34,C36 100n Unpolarized capacitor C17-C20 1u