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TB6612FNG dual H-bridge driver with two PWM/direction channels and STBY. Logic VCC is 2.7–5.5V; motor supply is 2.5–13.5V once its unlabeled library endpoint is verified. Library footprint: 25.4 × 22.86 mm.

ICS-43434 mono digital MEMS microphone with 24-bit I2S output. Exposes +3.3V, GND, SCK, WS, SD and LR channel select. Library footprint: 25.443 × 22.86 mm; keep the microphone sound port unobstructed.

Dual ICS-43434 microphone board sharing an I2S clock, word select and stereo data output. Exposes +3.3V, GND, WS, SD and SCK; no external LR pin is defined. Library footprint: 25.443 × 22.86 mm.

NAU8325 stereo Class-D audio amplifier module with I2S input and I2C control. Separate +5V amplifier and +3V3 logic supplies feed differential speaker outputs. Library footprint: 25.443 × 22.86 mm.

Two-terminal buzzer entry for audible feedback, with PIN1/PIN2 contacts and a 12.45 × 12.45 mm footprint. Confirm active versus passive type, polarity, voltage and current before selecting direct GPIO or transistor drive.

Two-terminal electret condenser microphone capsule with OUT and GND, requiring bias and an analog front end. Library footprint: 10.2 × 10.2 mm. It is not an amplified or digital microphone module.

GM014 CC/CV lithium-ion charger supporting 1S or 2S packs through a 2S solder selector. Input is 5–18V for 1S or 10–18V for 2S; charge targets are 4.2V/8.4V. Library footprint: 25.4 × 22.86 mm; set charge current for the pack.

Passive dual-Qwiic I2C breakout with SCL, SDA, VCC and GND. Shares one 3.3V bus across its connectors without level shifting or address isolation. Library footprint: 11.43 × 25.4 mm; allow cable insertion space.

Passive USB-C breakout for VBUS, GND, USB D+/D− and CC1/CC2. Actual footprint pad map matches pinLabels, while stale geometry/symbol aliases reverse it. Library footprint: 17.02 × 25.98 mm; resolve aliases before automatic wiring.

USB-to-TTL UART bridge with VBUS, VDD, TX, RX and GND. Library footprint: 25.4 × 22.86 mm. USB supplies power; confirm the fitted bridge's UART voltage and VDD output capacity before powering or interfacing a target.

Six-button resistor-ladder keypad read through one analog key output, with vcc and gnd. Each key produces a different voltage. Library footprint: 50.8 × 22.86 mm; supply and ADC range must be compatible.

CAP1203 three-channel capacitive-touch module with 3.3V power, I2C and optional INT output. CS1–CS3 are capacitive electrode connections, not digital button outputs. Library footprint: 50.836 × 22.86 mm.

Cherry MX-style hot-swap key footprint with a switch contact pair and separate LED anode/cathode contacts. Library footprint: 18.32 × 18.3 mm. Preserve SW1/SW2 and the literal Anonde/Cathode labels; verify socket and keycap compatibility.

Cherry MX PCB-mount keyswitch with integrated LED, measuring 13.97 x 13.97 x 15.2 mm and exposing four pins. The switch provides a momentary tactile actuation mechanism for keyboard input, while the built-in LED offers per-key illumination. PCB-mount pins secure the switch to the board for mechanical stability.

Bourns PTV09A-4225F-B203 is a through-hole rotary potentiometer in the PTV09A series, a three-terminal passive variable resistor with a shaft-actuated wiper for manual level, gain, or bias adjustment. It exposes three pins: END1 and END3 as the resistive element end terminals and WIPER as the moving contact, with adjacent pins spaced approximately 2.5 mm apart. The body measures 13.6 x 13.45 x 25.01 mm and includes two mechanical mounting-hole pads that carry no electrical net. Resistance value, taper, power rating, and voltage limits are not specified here and must be taken from the Bourns datasheet.

12 × 12 mm momentary tactile pushbutton represented by two pairs of duplicate contact labels (1 and 2). Library footprint: 16.3 × 12.519 mm. Use a biased/debounced GPIO input and verify actual contact continuity and actuator height.

6 × 6 mm momentary tactile pushbutton represented by two electrical contacts, SW1 and SW2. Use a pull-up or pull-down and debounce for GPIO inputs. Library footprint: 8.6 × 6.688 mm; verify actuator clearance.

Six-terminal double-pole changeover push switch with NO1/COM1/NC1 and NO2/COM2/NC2 groups. Library footprint: 7.99 × 9.55 mm. The title implies latching but legacy text says momentary; confirm the actual actuation type and ratings.

Mechanical incremental rotary encoder with quadrature A/B, common C and separate pushbutton S1/S2. Library footprint: 15 × 13.32 mm. It has no VCC pin; use pull-ups, debounce and a suitable enclosure/knob opening.

Two-contact right-angle JST EH-style connector, nominal 2.50mm pitch, for a polarized two-wire harness. Library footprint: 8.04 × 9.72 mm. Pin1/pin2 have no fixed polarity; verify the mating housing and purchased part ratings.

Two-contact polarized JST-style connector for a two-wire harness. Library footprint: 8.55 × 6.85 mm. Pin - 1 and Pin - 2 have user-assigned roles; confirm the exact connector series, pitch, mating housing, polarity and ratings.

Three-contact polarized JST-style wire-to-board connector for power and one signal, or other three-wire interfaces. Library footprint: 10.9 × 6.75 mm. Pin roles are user-assigned; confirm connector series, mating housing and ratings.

Four-contact polarized JST-style wire-to-board connector for power and two signals or another four-wire harness. Library footprint: 13.4 × 6.75 mm. Assign the cable pinout and confirm the exact connector series and ratings.

Five-contact polarized JST-style wire-to-board connector for power and multiple signals. Library footprint: 15.9 × 6.75 mm. No fixed pinout is defined; verify exact series, pitch, mating housing and electrical ratings.

Three-contact right-angle JST-style connector for a side-entry wire harness. Library footprint: 11 × 9.2 mm. Pin roles, exact series/pitch and ratings need confirmation; suitable for user-defined three-wire power/signal interfaces.

Four-contact right-angle JST-style connector with a 13.5 × 9.2 mm library footprint. Provides four passive user-assigned connections; verify exact series/pitch, mating housing and ratings while reserving side-entry cable clearance.

Five-contact right-angle JST-style connector for side-entry power/signal harnesses. Library footprint: 16 × 9.2 mm. All pin roles are user-assigned; confirm exact series, pitch, mating housing and electrical ratings.

Two-contact right-angle JST-style connector for a side-entry two-wire harness. Library footprint: 8.5 × 9.2 mm. Contacts have no inherent polarity; confirm the exact series, pitch, mating housing and current/voltage ratings.

Two-contact PCB screw terminal with 5.08mm pitch for removable wire connections. Library footprint: 10.08 × 7.62 mm. Assign both pin roles explicitly and choose wire gauge, current and voltage to match the purchased terminal rating.

Three-contact PCB screw terminal with 5.08mm pitch for removable field wiring. Library footprint: 15.24 × 7.62 mm. Pin functions are user-assigned; current, voltage and wire gauge depend on the purchased terminal.

0.91-inch 128 × 32 monochrome OLED with a four-pin I2C interface: GND, VCC, SCL and SDA. Library footprint: 38.7 × 12.046 mm. Confirm the fitted controller, supply range and I2C address for the purchased board.

SPI color TFT module with a 16-pin display/SD interface and a 42.842 × 67.44 mm library footprint. Legacy data identifies ILI9225/176 × 220 pixels but disagrees on screen diagonal; confirm panel, voltage and backlight ratings.

Single-digit LED display with seven segments, decimal point and two COM terminals. Library footprint: 23 × 13 mm. Confirm common-anode versus common-cathode polarity; each lit segment needs its own current limiting.

5mm blue indicator LED with library terminals VCC and GND. A series current limiter is required unless an onboard resistor is verified. Library footprint: 6.42 × 6.42 mm; select current and forward voltage from the actual LED.

5mm green indicator LED with library terminals vcc and gnd. Treat it as an LED requiring current limiting; direct connection across 3.3V or 5V is not established. Library footprint: 6.42 × 6.42 mm.

HD44780-style 16 × 2 character LCD with a 16-pin parallel interface, contrast input and backlight terminals. Library footprint: 122.28 × 44.25 mm. No I2C backpack is defined; verify actual supply, logic levels and unusually large envelope.

1.3-inch 128 × 64 monochrome I2C OLED module with SDA, SCL, VCC and GND. Library footprint: 36 × 34.2 mm. Confirm the fitted controller, module supply tolerance and bus address before choosing driver firmware or power.

5mm red indicator LED with library terminals VCC and GND. Use a series current limiter unless an onboard resistor is verified. Library footprint: 6.42 × 6.42 mm; select LED current and forward voltage from the actual part.

Common-positive RGB LED breakout with VCC and active-low R/G/B channels. Library footprint: 11.43 × 17.78 mm. Needs verified per-channel current limiting and suitable sink drive; supply and host logic must be compatible.

ESP32-C3 160MHz RISC-V controller with Wi-Fi/Bluetooth LE, I2C, SPI, UART and 3.3V GPIO. USB/VBUS 5V or one Li-ion/LiPo cell supplies onboard regulation/charging. Library footprint: 50.836 × 22.86 mm.

Compact RP2040 controller with dual-core Cortex-M0+ up to 133MHz, GPIO, ADC, SPI, I2C, UART and PWM. Exposes 5V, +3V3 and GND; logic is 3.3V only. Library footprint: 18 × 23.5 mm; confirm board power limits.

ESP32-S3 controller board with Wi-Fi, Bluetooth LE, I2C, SPI, UART, ADC and 3.3V GPIO. Powered from 5V USB/VBUS or a single-cell Li-ion/LiPo battery, with onboard charging. Library footprint: 50.836 × 22.86 mm.

ESP32-C6 controller board with Wi-Fi 6, Bluetooth LE and 802.15.4, plus I2C, SPI, UART and 3.3V GPIO. USB/VBUS or a one-cell Li-ion/LiPo battery supplies onboard regulation/charging. Library footprint: 50.836 × 22.86 mm.

ESP32-H2 RISC-V controller board for Bluetooth LE and 802.15.4 Thread/Zigbee, with I2C, SPI, UART and 3.3V GPIO. USB/VBUS or one-cell Li-ion/LiPo power uses onboard regulation/charging. Library footprint: 50.836 × 22.86 mm.

RP2040 controller board with dual Cortex-M0+ cores, 3.3V GPIO, ADC, SPI, I2C, UART and SWD. USB/VBUS or a single-cell battery feeds 3.3V regulation; onboard LiPo charging is provided. Library footprint: 50.8 × 22.86 mm.

BC547 NPN small-signal transistor with COLLECTOR, BASE and EMITTER terminals in a 4.45 × 5.2 mm library footprint. Use a base resistor; select load current, voltage and power within the fitted transistor's ratings.

Four-channel MOSFET bidirectional logic-level translator with paired A1–A4/B1–B4 signals, low-side VCC and high-side VDD. Suited to open-drain buses between separate logic domains. Library footprint: 25.4 × 22.86 mm.

Two-terminal capacitor entry for decoupling, filtering, coupling and timing. Library footprint: 12.467 × 12.467 mm. Capacitance, voltage rating, dielectric, ESR and polarity are unspecified and must be selected for the circuit.

Generic two-terminal diode entry for rectification, clamping or protection. Library footprint: 12.86 × 3.2 mm. PIN1/PIN2 do not identify anode/cathode; select the actual diode type, polarity and ratings before connection.

1N4148 small-signal switching diode with explicit K cathode and A anode contacts. Library footprint: 9.4 × 2.24 mm. Suitable for signal switching/clamping; verify current, reverse voltage and pulse ratings for the selected manufacturer.

Two-terminal non-polarized light-dependent resistor whose resistance falls with increasing light. Library footprint: 5.047 × 4.15 mm. Use a resistor divider for ADC sensing; resistance range and response depend on the actual LDR.

Limit-switch assembly exposing V/G/S interface pins and C/NO/NC switch contacts. Library footprint: 19.88 × 20.08 mm. Use the signal interface or verified dry-contact topology; confirm supply, output polarity and internal common connections.

Three-terminal trimmer potentiometer with GND, OTUPUT (wiper) and VCC labels. Library footprint: 10 × 5.33 mm. Resistance, taper and power rating are unspecified; use for manual calibration with accessible adjustment.

Three-terminal rotary potentiometer with ccw/cw end contacts and output wiper. Library footprint: 22.45 × 12.1 mm. The 90-degree name does not establish electrical travel; confirm mounting orientation, resistance, taper and shaft geometry.

Two-terminal non-polarized resistor for current limiting, bias, voltage division and signal termination. Library footprint: 2.87 × 12.26 mm. Select resistance, tolerance and power rating for the circuit; no fixed value is defined.

Four-terminal RGB LED with R, G, B channels and common C. Library footprint: 5.99 × 5.99 mm. Confirm common-anode/common-cathode polarity; use one current-limiting resistor per channel and optional PWM drivers.

MCP79412-based I2C real-time clock module for timekeeping and battery-backed operation. Exposes +3V3, GND, INT, CLK, SDA and SCL. Library footprint: 25.443 × 22.86 mm; reserve access to the backup-cell holder.

PCF8563 I2C real-time clock module with +3V3, GND, INT, CLK, SDA and SCL. Provides timekeeping, alarm/timer interrupt and clock output. Library footprint: 25.443 × 22.86 mm; verify backup-power provisions on the fitted board.

5V single-channel relay module with IN control and SPDT NC/COM/NO contacts. Control and load terminals are separate circuit domains. Library footprint: 50.836 × 22.86 mm; confirm trigger polarity and contact ratings for the fitted board.

Four-channel MOSFET bidirectional logic-level translator with paired A1–A4/B1–B4 signals, low-side VCC and high-side VDD. Suited to open-drain buses between separate logic domains. Library footprint: 25.4 × 22.86 mm.

Four-pin DC-DC boost converter with IN, OUT and common GND contacts. Library footprint: 25.4 × 22.86 mm. Input is pin1 and output is pin3; verify the fitted board's input range, output voltage and current limit.

SY81103-based step-down converter with IN/GND/OUT/GND terminals. Legacy board data specifies 4.5–18V input and a fixed output selected by board variant. Library footprint: 25.4 × 22.86 mm; verify output setpoint and continuous current.

Powered limit-switch module exposing VCC, GND and a signal net literally named Net-(D1-K). Library footprint: 25.443 × 22.86 mm. Confirm supply and output circuit before connecting the active-low signal to host logic.

5V two-channel relay module with IN1/IN2 controls and separate COM/NO contact pairs. No NC contacts are exposed. Library footprint: 50.836 × 22.86 mm; verify input trigger compatibility, contact ratings and isolation.

Half-duplex RS-485 transceiver module with UART-side TX/RX, DE direction control and A/B/GND field terminals. Library footprint: 25.4 × 22.86 mm. Confirm 5V supply, host logic compatibility, direction polarity and fitted termination.

BC557 PNP small-signal transistor in a TO-92-style footprint, with COLLECTOR, BASE and EMITTER connections. Library footprint: 4.8 × 4.213 mm. Requires base-current limiting and a load chosen within the fitted part's ratings.

CAP1203 three-channel capacitive-touch module with 3.3V power, I2C and optional INT output. CS1–CS3 are capacitive electrode connections, not digital button outputs. Library footprint: 50.836 × 22.86 mm.

DHT11 digital temperature/humidity sensor with VDD, DATA, NC and GND. Uses a timing-based single-wire interface rather than I2C. Library footprint: 5.33 × 10.06 mm; confirm supply and measurement limits for the actual sensor.

Three-terminal Hall-effect magnetic sensor entry with signal, ground and vcc connections. Library footprint: 4.6 × 5.59 mm. Exact sensor type, supply range, output style, polarity and magnetic sensitivity are not specified.

ICM-42670-P six-axis IMU module with 3-axis accelerometer and gyroscope, temperature sensing, I2C/SPI and INT/FSYNC. It has no magnetometer. Uses 3.3V power/logic; library footprint: 25.443 × 22.86 mm.

QMC6309 three-axis digital magnetometer module with +3.3V power, GND and I2C SDA/SCL. Library footprint: 25.458 × 22.842 mm. Measures magnetic field for heading/orientation applications; verify address and perform system calibration.

HC-SR04 ultrasonic distance sensor with 5V VCC, TRIG input and ECHO output. Measures approximately 2–400 cm using a 40kHz acoustic burst. ECHO needs level reduction for 3.3V hosts. Library footprint: 45.5 × 20.7 mm.

W25Q64JV serial NOR flash module with 64Mbit (8MB) storage and SPI/quad-SPI pins. Operates in the 3.3V domain. Library footprint: 25.4 × 11.43 mm; WP/SD2 and HOLD/SD3 roles depend on the selected bus mode.

MicroSD module with 3.3V power, SPI signals, card-detect CD and optional D1/D2 data lines. Library footprint: 25.443 × 22.86 mm. Use a dedicated CS and verify card-detect polarity, pull-ups and alternate SDIO support.

TerraLink EC200U cellular carrier exposing VIN/GND, UART G_TX/G_RX and reset/power-key controls. Library footprint: 63.5 × 45.72 mm. Board-level VIN range and UART levels are unverified; confirm the carrier revision before power or host wiring.

TerraLink A7672S cellular carrier with VIN/GND, UART G_TX/G_RX, reset/power-key and GP_1/GP_2. Library footprint: 63.5 × 45.72 mm. Verify board VIN, logic levels and modem variant; no CAN or RS-485 endpoints are defined.