Docs / Components

Components: specs and pinouts

Reference pages for the components Soldr builds with. Every value is taken from the manufacturer's datasheet or official page, and each one cites its source and section.

0.96 inch OLED (SSD1306): 128 x 64 dot-matrix OLED segment and common driver with an on-chip controller, driven over I2C or serial
1.54 inch e-ink display (200x200): A 200 x 200 pixel black and white e-paper module with an SPI interface and a driver board, in hardware versions V1 and V2
1.8 inch TFT (ST7735): ST7735S single-chip TFT controller and driver for small colour LCD panels, controlled over a serial or 8080-style parallel interface
12864 graphic LCD (ST7920): A 128 x 64 monochrome graphic LCD module that uses the ST7920 controller, which offers 8-bit, 4-bit and serial interfaces and a built-in character ROM
1602 LCD keypad shield: An Arduino shield with a 16x2 character LCD (blue backlight), five menu buttons read through one analog pin, a reset button and a contrast potentiometer. Facts here come from the DFRobot DFR0009 sheet; the stocked shield's maker is not confirmed
16x2 I2C LCD (PCF8574): I2C backpack with a PCF8574 expander that drives an HD44780-compatible 16x2 character LCD over a 4-bit parallel bus
2.4 inch TFT (ILI9341): 240 x 320 TFT LCD single-chip driver with 262K colours and 1.65-3.3 V interface, used for small colour panels
2.9 inch e-paper display (296x128): A 2.9 inch black and white e-ink display module with 296 x 128 pixels, an on-board controller and an 8-pin SPI connector, supporting partial refresh. Facts below come from the Waveshare 2.9 inch e-Paper Module manual; the stocked module's own maker is not confirmed
20x4 I2C LCD (PCF8574): I2C backpack with a PCF8574 expander that drives an HD44780-compatible 20x4 character LCD over a 4-bit parallel bus
3.5 inch TFT touchscreen for Raspberry Pi: Reference: Waveshare 3.5inch RPi LCD (A); the stocked clone may differ. A 3.5 inch 480 x 320 resistive-touch TFT that plugs onto the 40-pin Raspberry Pi header and is driven over SPI. Facts here come from the Waveshare 3.5inch RPi LCD (A) wiki; the stocked board's maker is not confirmed
74HC595 2-digit 7-segment display: A 2-digit, 7-segment LED display module that uses 74HC595 shift registers to drive the segments from a serial input. The values below describe the SN74HC595 chip; the module board, its header and its segment resistors are not covered by an official document
A3144 Hall effect sensor: The chip is the Allegro A3144, a unipolar Hall-effect switch (Allegro lists it as discontinued); the module chip on the listing board is not verified. The output turns on when a magnet of the right polarity gets close and releases when it moves away
A4988 stepper driver: Microstepping DMOS driver for bipolar stepper motors, with step and direction control and a set current limit up to 2 A
ACS712 20A current sensor: The ACS712 is a Hall-effect linear current sensor IC with an isolated low-resistance conductor, available in a 20 A range version. The listing is a module built on it
ADS1115 16-bit ADC: 16-bit I2C analog-to-digital converter with four single-ended or two differential inputs and a programmable gain amplifier
ADXL345 accelerometer: Digital 3-axis accelerometer with selectable ±2 g to ±16 g ranges and I2C or SPI interfaces
AHT10 temperature and humidity sensor: Digital I2C temperature and relative-humidity sensor (ASAIR/Aosong AHT10 chip) on a breakout. The manual covers the bare chip; the breakout is not documented
AHT21B temperature and humidity sensor: A digital I2C temperature and relative humidity sensor from Aosong (ASAIR), with calibrated output, on a small module
Analog TDS sensor: Signal board plus two-needle probe that outputs an analog voltage related to dissolved solids (TDS) in water. Every spec and pin row below is from the DFRobot Gravity Analog TDS Sensor (SEN0244) wiki, a reference board: the stocked board is not confirmed to be that board
AP7361C 3.3 V LDO breakout: A breakout board for the Diodes Incorporated AP7361C, a 1 A low-dropout linear regulator with an enable pin. This page gives the AP7361C chip facts for the 3.3 V option (3.3 V version per the product name, not confirmed on the board); the breakout board itself (package, header labels, enable wiring) is not covered by an official document
APDS-9960 gesture sensor: Optical sensor chip with proximity, ambient light, RGB colour and gesture detection over an I2C interface
AS5600 magnetic encoder: Magnetic rotary position sensor chip with 12-bit angle output, analog or PWM output, and an I2C interface
BC547 NPN transistor: A small general-purpose NPN bipolar transistor in a TO-92 package, used as a low-side switch or small-signal amplifier. The source sheet is the Fairchild BC546/547/548/549/550 data sheet (BC547 rows used); the stocked part's own maker markings were not verified
BH1750 light sensor (GY-30): Breakout module built around the ROHM BH1750FVI digital ambient light sensor IC, which reads light level over I2C. Facts below are for the BH1750FVI chip; the GY-30 board itself is not covered by an official document
BME280 (GY-BME280): Combined humidity, pressure and temperature sensor chip with I2C or SPI interface
BME680 (temperature, humidity, pressure, gas): A Bosch Sensortec environmental sensor that measures temperature, humidity, pressure and a gas-sensor resistance, over I2C or SPI
BMP180 pressure sensor (GY-68): A module carrying the Bosch BMP180 digital pressure and temperature sensor, read over I2C. The module board itself (regulator, pull-ups, header order) is not covered by an official document
BMP280 pressure sensor: Barometric pressure and temperature sensor chip with I2C and SPI interfaces, measuring 300 to 1100 hPa
BPW34 photodiode: A silicon PIN photodiode in a clear flat top-view package, sensitive to visible and near-infrared light. It is a bare diode with no amplifier or logic output
CAN-Bus shield (MCP2515 + MCP2551): An Arduino Uno shield that adds a CAN bus node using the MCP2515 CAN controller (SPI) and the MCP2551 CAN transceiver, as named in the product title. This page gives the two Microchip chip facts; the Elecrow board itself (pins used, jumpers, terminal layout, extra parts) is not covered by a document found for this page
CD4511 BCD to 7-segment decoder: The CD4511B CMOS BCD-to-7-segment latch decoder driver, which turns a 4-bit BCD code into segment outputs that drive a common-cathode LED display directly (each segment still needs a series resistor). Bare 16-pin IC
CD4532 8-bit priority encoder: A CMOS 8-bit priority encoder: it converts the highest-priority active input among D7-D0 into a 3-bit binary code on Q2-Q0 (D7 has the highest priority, D0 the lowest). GS goes high when any input is active; EO goes high when none is, so chips can be cascaded
CD4543 BCD to 7-segment decoder: A CMOS BCD-to-seven-segment latch/decoder/driver for LCD displays that can also drive LEDs. It has a latch input, a blanking input and a phase input that selects common-cathode or common-anode LEDs or an LCD backplane signal
CH340G USB to serial IC: The WCH CH340G, a USB to serial UART bridge chip in a 16-pin SOP/SOIC package. It needs an external 12 MHz crystal and capacitors. Sold here as a bare chip, so board-level facts (USB connector, regulator) do not apply
CH9121 serial to Ethernet module: A serial-to-Ethernet converter module built around the WCH CH9121 network serial port transparent transmission chip. All figures below are for the chip; the module board itself (power input, level shifting, connector order) is not covered by an official document
CP2102 USB-UART board: A USB-to-serial adapter board built around the CP2102 bridge, used to program and talk to microcontrollers over a virtual COM port. Spec rows below are for the original CP2102 (Rev 1.0, 10/04); the stocked board may carry a CP2102N, which differs. This page covers the CP2102 chip; the board (micro-USB socket, header labels, voltage output) is not covered by an official document
Crowtail NFC reader (PN532): 13.56 MHz NFC/RFID reader module built on the NXP PN532 controller, with a separate PCB antenna on a connector. I2C by default, UART by changing solder pads (Elecrow wiki). The facts below are for Elecrow's Crowtail-NFC, model CRT01015N. No document for a 2.0 revision is available, so the 3.3 V rating, 28 mm range and pin labels may not apply to a 2.0 board
DHT11 temperature and humidity sensor: Low-cost digital temperature and humidity sensor with a single-wire data output
DHT22 temperature and humidity sensor: Digital temperature and humidity sensor with a single-wire output, rated for 0 to 100 %RH and -40 to 80 °C
DRV8825 stepper driver: A bipolar stepper motor driver with a built-in microstepping indexer: one pulse on STEP moves the motor one (micro)step and DIR sets the direction. This page covers the DRV8825 chip; the module board is not covered by an official document
DS18B20 temperature sensor: DS18B20 digital thermometer chip with a 1-Wire interface, 9 to 12-bit resolution and a -55 to +125 °C range; the probe is not covered
DS3231 real-time clock: I2C real-time clock with an integrated temperature-compensated crystal oscillator and a battery backup input
FlySky FS-i6 + FS-iA6B: A 6-channel 2.4 GHz radio-control transmitter (FS-i6) bundled with a 6-channel receiver (FS-iA6B), both using the maker's AFHDS 2A protocol. The maker's page lists fixed-wing, glider, helicopter and boat models
FSR 402 force sensor: Round thick-film force sensing resistor whose resistance falls as pressure on its 14.68 mm active area increases
FT232RL USB to TTL adapter: A USB-to-serial adapter board using the FTDI FT232RL chip. Figures below are for the chip; the adapter board (voltage selector jumper, header order, protection) is not covered by an official document
GP2Y0A02YK0F distance sensor: A Sharp infrared triangulation distance sensor, model GP2Y0A02YK0F, with an analog voltage output. Sharp's unit stamp reads 2Y0A02 F followed by a production month and year code
GP2Y1010AU0F dust sensor: A Sharp optical dust sensor: an infrared LED and a phototransistor sit diagonally and the unit reports reflected light from particles in the air as an analog voltage. Sharp's sheet describes dust detection, not PM2.5 mass measurement
GUVA-S12SD UV sensor: A module built around the GenUV GUVA-S12SD gallium-nitride UV photodiode. The sheet covers the bare photodiode; the module's amplifier, supply and output scaling are not documented
HB100 Doppler radar: An X-band bi-static Doppler transceiver (dielectric resonator oscillator, single balanced mixer, antenna arrays). Its only output is a low-level analog IF signal, not a digital motion flag; the listing calls it a motion sensor module, but the maker sheet shows no motion output
HC-SR04 ultrasonic sensor: Ultrasonic ranging module with a trigger input and an echo output, measuring 2 cm to 400 cm
HLK-LD2410B 24 GHz radar: A 24 GHz FMCW radar module from Hi-Link for human presence sensing, with a presence output pin and a UART
HX710B air pressure sensor: A module whose listing names the Avia HX710B 24-bit analog-to-digital converter paired with a pressure element. The sheet covers the HX710(A/B) chip only; the pressure element, pin labels and module supply are not documented
INA219 current sensor (CJMCU-219): A zero-drift bidirectional current and power monitor chip with an I2C/SMBus interface that measures shunt voltage and bus voltage
INA226 power monitor: A module built around the Texas Instruments INA226, a 16-bit I2C current, bus voltage and power monitor with an alert pin. This page gives the INA226 chip facts; the module's shunt resistor value, pull-ups and header order are not covered by an official document
INA3221 3-channel power monitor: A three-channel high-side current and bus-voltage monitor chip with an I2C/SMBus interface. This page covers the INA3221 chip; the module board (shunt resistor values, address jumpers, pull-ups, connectors) is not covered by an official document
INMP441 I2S microphone: Omnidirectional MEMS microphone with a 24-bit I2S digital output, on a breakout board. The data sheet describes the bare chip, not the breakout
IRF540N N-channel MOSFET: A 100 V N-channel HEXFET power MOSFET in a TO-220 package, used as a low-side switch. Figures are from the Infineon IRF540NPbF datasheet
L293D motor driver shield: A shield sold for Arduino that carries L293D quadruple half-H drivers (each chip drives two DC motors or one bipolar stepper, within 600 mA per channel). This page covers the L293D chip only; the shield board itself (how many chips, which Arduino pins, servo headers, power jumper) is not covered by an official document
L298N motor driver: Dual full-bridge motor driver IC for DC motors and two-phase stepper motors, with a motor supply up to 46 V
LM317 adjustable regulator module: An adjustable linear voltage regulator module built around the LM317 type. This page covers the LM317 chip; the module board (potentiometer, input diode, connectors, current rating) is not covered by an official document
LM35 temperature sensor: Analog temperature sensor in a 3-pin TO-92 package whose output voltage is proportional to the temperature in degrees Celsius
LM358 dual op-amp: A dual low-power operational amplifier IC. Values below are the Texas Instruments 'LM358, LM358A' column of the LM158/258/358/2904 family sheet; the product name does not say whether it is an A or B version or which package, and the B versions differ
MAX30102 pulse oximeter sensor: Integrated pulse-oximetry and heart-rate sensor with red and infrared LEDs, a photodetector, and an I2C interface
MAX485 RS-485 module: A half-duplex RS-485/RS-422 transceiver with one driver and one receiver. It turns a microcontroller's TTL-level serial signals into a differential A/B pair for long cable runs. This page covers the MAX485 chip; the module board is not covered by an official document
MAX6675 thermocouple module: A cold-junction-compensated K-type thermocouple-to-digital converter that outputs a 12-bit reading over a read-only SPI-compatible interface. The store listing mentions a relay; no source documents one, so this page makes no relay claim
MAX7219 8x8 LED matrix: Serially interfaced driver for common-cathode LED displays of up to 8 digits or 64 individual LEDs, with a 10 MHz serial interface
MAX9814 microphone amplifier: Electret microphone amplifier with automatic gain control. The maker data sheet covers the MAX9814 chip, whose output is centred on a DC bias; the breakout board is not covered, so its output level is not documented
MAX98357A I2S amplifier: A mono amplifier that takes digital I2S audio (BCLK, LRCLK, DIN) and drives a speaker directly through a Class D output stage, with no separate DAC and no MCLK needed. This page covers the MAX98357A chip; the module board around it is not covered by an official document
MCP4725 I2C DAC: A single-channel 12-bit digital-to-analog converter chip with on-board EEPROM and an I2C interface. The facts below are for the MCP4725 chip; the breakout module is not covered by an official document
MFRC522 RFID reader: Contactless reader and writer IC for ISO/IEC 14443 A cards and tags (MIFARE, NTAG) with a host interface
MG90S metal gear micro servo: A micro servo from TowerPro with the specification table published on the maker's product page. The maker page does not give a pin or wire-colour table, a stall current or a PWM pulse range
MG996R servo: High-torque metal-gear hobby servo for angular positioning, controlled by a PWM signal; specs from the manufacturer's product page
MLX90614 IR thermometer: The MLX90614 is a factory-calibrated infrared thermometer in a TO39 can with SMBus and PWM output. It measures object and ambient temperature
MPU6050 6-axis IMU: Six-axis motion tracking device with a 3-axis gyroscope and 3-axis accelerometer, controlled over I2C
MPU9250 9-axis IMU: A 9-axis motion tracking chip: a 3-axis gyroscope, a 3-axis accelerometer and a 3-axis AK8963 magnetometer in one 3 x 3 x 1 mm QFN package, read over I2C or SPI
MQ-2 gas sensor: MQ-2 semiconductor (SnO2) combustible-gas sensor element on a module. The maker sheet lists high sensitivity to LPG, propane and hydrogen and use for methane and other combustible vapours
MQ-3 alcohol gas sensor: MQ-3 semiconductor (SnO2) sensor element for alcohol vapour on a module. The Hanwei sheet lists high sensitivity to alcohol and small sensitivity to benzine. This is a learning part: it is not a breathalyser and must not be used to decide whether to drive
MQ-4 methane gas sensor: MQ-4 semiconductor (SnO2) sensor element for methane and natural gas on a module. The Hanwei sheet lists small sensitivity to alcohol and smoke
MQ-7 carbon monoxide gas sensor: MQ-7 semiconductor (SnO2) sensor element for carbon monoxide on a module. The Hanwei sheet specifies a two-level heater cycle for its standard condition
MQ-8 hydrogen gas sensor: MQ-8 semiconductor (SnO2) sensor element for hydrogen on a module. The Hanwei sheet lists small sensitivity to alcohol, LPG and cooking fumes
MQ-9 gas sensor: A tin dioxide (SnO2) semiconductor gas sensing element for carbon monoxide and combustible gases such as methane and propane, read as a resistance change. The sensor is heated with a high (5.0 V) and low (1.5 V) cycle
MS4525DO airspeed sensor: The MS4525DO is a small ceramic PCB-mount pressure transducer from TE Connectivity with 14-bit pressure and 11-bit temperature output over I2C or SPI. The listing is an airspeed sensor built on it
MT3608 boost converter: A step-up (boost) DC-DC converter built on the MT3608 chip: it raises a lower DC voltage to a higher one, with the output set by a resistor divider on the chip's feedback pin. This page covers the MT3608 chip; the module board is not covered by an official document
NE555 delay switch module (12 V): A 12 V time-delay switch module sold with NE555 in the name. This page gives the NE555 timer chip facts only; the module's actual delay range, switching element and load rating are not covered by an official document
NEO-M8N GPS module: A u-blox NEO-M8N concurrent GNSS receiver (GPS, GLONASS, BeiDou, Galileo) module with UART, USB, SPI and I2C-compatible DDC interfaces; the listing adds an active ceramic antenna. The listing board is not confirmed to carry a genuine u-blox NEO-M8N (look-alike receivers are sold under this name)
Nokia 5110 LCD (PCD8544): An 84 x 48 pixel monochrome LCD module that uses the PCD8544 controller/driver, which is controlled over a serial bus
nRF24L01 2.4 GHz transceiver: 2.4 GHz ISM-band RF transceiver chip with 126 channels, 250 kbps, 1 Mbps or 2 Mbps air data rates, and an SPI interface
OV5647 5MP IR-cut camera: A third-party camera board built on the OmniVision OV5647 5-megapixel sensor, with an infrared cut filter and (per the product name) automatic day/night switching. This page covers the OV5647 sensor; the board itself (IR-cut mechanism, lens, connector) is not covered by an official document
OV7670 camera module: A 1/6 inch VGA CMOS image sensor with an on-chip image processor. It outputs 8-bit parallel pixel data and is configured over an SCCB (I2C-compatible) interface
PAM8403 stereo amplifier: A stereo class-D audio amplifier built around the PAM8403 chip, which drives speakers directly without an output filter. The facts below are for the chip; the module board is not covered by an official document. Diodes Incorporated marks the PAM8403 as not recommended for new design
PCA9685 16-channel PWM driver: 16-channel, 12-bit PWM LED and servo driver controlled over I2C in Fast-mode Plus at up to 1 MHz
PCF8574 I2C LCD backpack: A small board that turns a parallel HD44780-style character LCD into an I2C device by using a PCF8574 8-bit I2C I/O expander. The values below describe the PCF8574 chip; the backpack's own wiring is not covered by an official document
Pulse sensor (analog): An optical pulse (photoplethysmography) sensor: an LED lights the skin, a light sensor reads the reflected light, and the analog output follows the pulse waveform. For learning and experiments only. The specs are from the maker's PulseSensor datasheet for the original board; the listing may be a clone and its board is not covered. The output goes to an ADC, so it needs a board with an analog input (a Raspberry Pi has none)
PZEM-004T AC energy monitor: A single-phase AC measurement module for voltage, current, active power, frequency, power factor and energy; the 100A version uses an external current transformer. It connects to mains. The maker page title for the series says 'TTL Modbus'. Figures below are from the maker's PZEM-004T product page
QMC5883L compass: A 3-axis magneto-resistive magnetic field sensor chip with a 16-bit ADC and I2C interface, used for compass heading
Ra-02 LoRa module (433 MHz): Ai-Thinker Ra-02, a 16-pad SMD LoRa transceiver module for 410-525 MHz with an SPI interface and an IPEX antenna connector
Raspberry Pi 7 inch touch display: Raspberry Pi's 7 inch 800 x 480 touchscreen with a multi-touch capacitive panel, connected through an adapter board by a ribbon cable to the DSI port and powered from the GPIO port
Raspberry Pi AI Camera (IMX500): A Raspberry Pi camera built on the Sony IMX500 Intelligent Vision Sensor, which combines a 12-megapixel sensor with on-chip neural network inference. It adds tensor metadata to the image stream so the host Raspberry Pi is free for other work
Raspberry Pi AI HAT+ (13 TOPS): An add-on board for the Raspberry Pi 5 with a built-in Hailo neural network accelerator (Hailo-8L, 13 TOPS in this variant). It connects over the Pi 5's PCIe connector plus the GPIO header and is picked up automatically by Raspberry Pi OS and the camera software
Raspberry Pi Camera Module 3 Wide: The wide-angle variant of Raspberry Pi Camera Module 3: a Sony IMX708 12-megapixel sensor with phase detection autofocus, HDR mode and CSI-2 output. The standard (non-NoIR) variants have an integrated infrared cut filter
Raspberry Pi Camera Module V2: The 8-megapixel Raspberry Pi Camera Module 2: a small CSI-2 camera board with adjustable focus on a 15-pin ribbon connector. Raspberry Pi's documentation says units made before November 2026 use the Sony IMX219 sensor and later ones use the Sony IMX355, with the same 8-megapixel resolution
Raspberry Pi Global Shutter Camera: A 1.6-megapixel Raspberry Pi camera built on the Sony IMX296 global shutter sensor, which exposes every pixel at once so fast motion is not skewed. It has a C/CS lens mount (no lens included) and an external trigger input
RFM95PW LoRa module (868 MHz): HopeRF RFM95PW-868S2 (RF96 chip per the maker), a 17-pad SMD LoRa transceiver module with a power amplifier, +27 dBm output in the 868 MHz band
RPLIDAR A1 (A1M8): Slamtec 2D laser triangulation scanner that spins 360 degrees and reports distance and angle over a 3.3 V UART. The motor and the scanner core have separate supply pins
SG90 micro servo: A 9 g micro hobby servo sold as an SG90, controlled by a PWM signal. The specs below are from the maker's (TowerPro) SG90 Analog product page, which has no PDF datasheet. The listing does not say whether the unit shipped is the analog or the digital SG90, so the figures may not match a digital unit
SH1106 OLED 1.3 inch: A 1.3 inch monochrome OLED module built around the SH1106 controller, which drives up to a 132 x 64 dot panel and has an embedded 132 x 64 bit display RAM
SHT30 temperature and humidity sensor: Breakout module carrying the Sensirion SHT30 digital humidity and temperature sensor with an I2C interface. The SHT30 chip is assumed from the module name; the listing board may carry a clone
SIM800L GSM module: GSM/GPRS cellular module for voice, SMS and data, controlled through AT commands; specs limited to a SIMCom reference design
Spectra flex sensor 2.2 inch: Two-terminal flex sensor whose resistance rises as it is bent; used for angle displacement measurement such as finger bend in a glove
SS360NT Hall effect sensor: A high-sensitivity latching digital Hall-effect sensor IC in a SOT-23 surface-mount package. It switches on when a North pole is applied and stays latched until the opposite (South) pole is applied. This is a bare SMD chip, not a breakout module
SS49E linear Hall sensor: A low-cost linear Hall-effect sensor IC in a flat TO-92-style package with an analog, current-sourcing output that follows the magnetic field
TB6600 stepper driver: A bipolar stepper motor driver module named for the Toshiba TB6600HG chip. This page covers the TB6600HG chip; the module board (switch settings for current and microstep, terminals, opto inputs, which chip is actually fitted) is not covered by an official document
TCA9548A I2C multiplexer: An I2C switch chip that fans one I2C bus out to eight separate channels, so identical-address devices can share one controller. This page covers the TCA9548A chip; the breakout board (pull-ups, address jumpers, header order) is not covered by an official document
TCRT5000 reflective IR sensor: The specs on this page are for the bare Vishay TCRT5000 part (infrared emitter and phototransistor in one package); the listing is a module board whose supply and output are undocumented. Reflective optical sensor with an infrared emitter and a phototransistor in one leaded package; it reports how much infrared bounces back from a nearby surface
TCS3200 color sensor: A programmable colour light-to-frequency converter chip: a photodiode array with red, green, blue and clear filters whose square-wave output frequency follows the light level
TCS34725 RGB color sensor: An I2C color light-to-digital converter chip (ams / TAOS TCS3472 family) that returns red, green, blue and clear light values, mounted on a module
TM1637 4-digit display: A 4-digit, 7-segment LED display module driven by the TM1637 LED driver and key-scan chip over a two-wire serial interface. The values below describe the TM1637 chip; the module board itself is not covered by an official document
TP4056 Li-ion charger: Single-cell lithium-ion battery charger IC with constant-current/constant-voltage charging up to 1000 mA and a fixed 4.2 V float voltage
Trackball breakout (ICSH044A): Original a hosted copy design; the listing board is assumed to match. A breakout for a trackball: four Hall effect sensors give up, down, left and right movement outputs, a switch under the ball gives a click output, and four LEDs light the ball
TTP223 touch sensor: A one-key capacitive touch module built around the Tontek TTP223 touch detector IC. It replaces a push button with a touch pad
VL53L0X distance sensor (GY-53): VL53L0X time-of-flight ranging chip with I2C control, an active-low XSHUT pin and a 940 nm emitter; module details are not covered
VL53L1X distance sensor: A long-distance Time-of-Flight laser ranging sensor from ST with a 940 nm Class 1 emitter, an I2C interface and programmable region of interest
W5100 Ethernet shield: An Arduino-format shield that adds a wired 10/100 Ethernet port using the WIZnet W5100 chip, plus a micro SD card slot. The chip facts come from the WIZnet W5100 datasheet; the signal names come from the official Arduino Ethernet Shield schematic
Water turbidity sensor: Optical turbidity probe with an amplifier board that gives an analog voltage, and a digital high/low output with an adjustable threshold. Every spec below is from the DFRobot SEN0189 wiki, a reference board: the stocked board is not confirmed to be that board, so its supply, output range and digital output are not confirmed
Waveshare 20 kg-cm bus servo: A serial bus servo (Waveshare ST3215-HS per the maker's wiki) with a 360 degree magnetic position sensor. Servos share one TTL serial bus, each with its own ID, and report position, load, speed and input voltage; it runs in servo (angle) mode or in motor (continuous rotation) mode
WS2812 24-LED ring: A circular board of individually addressable RGB LEDs driven by WS2812-type controllers over a single data wire. LED type (WS2812 or WS2812B) and count are not documented. The values below come from the WS2812B chip datasheet; the board's exact LED type and count are not documented by a maker sheet
XKC-Y25 NPN liquid level sensor: A capacitive sensor that detects liquid through the wall of a flat container or large pipe without touching it. The XKC-Y25 family comes in V (voltage), NPN, PNP and RS-485 output versions; this listing is the NPN one
ZHT103 AC current sensor: The ZHT103 is a through-hole precision current transformer (1000:1) made by Nanjing Zhen Hengtong. The maker sheet covers the bare transformer; the listing is a module built around it
ZMPT101B AC voltage sensor: Breakout built around the ZMPT101B current-type voltage transformer, used to read the shape of an AC voltage through an analog input. The maker document covers the bare transformer only, not the module's amplifier, offset or trimmer