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The third axis, for subjects that cut across boards and topics — a specific part number, a protocol, a tool. A tag earns a page once at least 2 pages carry it; below that it is metadata, not a shelf.

tinkerblock 105getting started 49arduino 46beginner 44lb boards 27analog 13I²C 13sensors 13ESP32 12led 9input 8sensor 8SPI 8displays 7expansion base 7pwm 7esp32 s3 6gpio 6pinout 6power 6switch 6temperature 6infrared 5audio 4button 4display 4humidity 4joystick 4magnet 4UART 4usb c 474hc595 3breakout 3i2s 3max7219 3rgb 3screw terminal 3shift register 3tilt 3transistor 3adc 2ams1117 2arcade 2battery 2breadboard 2buzzer 2coin acceptor 2DHT22 2hall 2ina219 2inputs 2lcd 2led matrix 2level shifter 2light 2logic level converter 2microphone 2optical 2potentiometer 2remote 2seven segment 2sound 2st7735 2storage 2tft 2type c 2vibration 2voltage 2ws2812 2
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