Silly banana for scale PCB ruler, with functions

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Main components

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Part NumberDescription
NE555DPrecision Timers, 555 compatible, SOIC-8
ATmega1280-16A
CH340G
ATmega328-A
ESP32-C3-WROOM-02
ESP32-S3-WROOM-1RF Module, ESP32-S3 SoC, Wi-Fi 802.11b/g/n, Bluetooth, BLE, 32-bit, 3.3V, onboard antenna, SMD
AMS1117-3.31A Low Dropout regulator, positive, 3.3V fixed output, SOT-223
SOT89
DPAK
D2PAK

musa schematic

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musa board layout

musa PCB render

Top PCB
Bottom PCB