This is the HC-SR04 ultrasonic ranging sensor. This economical sensor provides 2cm to 400cm of non-contact measurement functionality with a ranging accuracy that can reach up to 3mm. Each HC-SR04 module includes an ultrasonic transmitter, a receiver and a control circuit.

200grm Straight Bar Mini Load Cell RSN-157 Weight Capacity Max - 200 g Maximum Overload - 220 g Cell Repeatability Error Max - ± 50 mg Cell Non-Linearity Max - 50 mg Cell Hysteresis Max - 50 mg Electrical Properties Rated Output - 600 μV/V Rated Output Error Max ± 150 μV/V Output Impedance 1 kΩ Creep 100 mg/hr Temperature Effect on Zero 5 mg/°C Temperature Effect on Span 5 mg/°C Supply Voltage Min 3 V DC Supply Voltage Max 10 V DC Zero Balance Ratio ± 100 μV/V Material - Aluminium Alloy (LY12CZ) Screw Thread Size - 2.5M 47mm x 12mm x 6mm, 110mm Wire

LM7812- 12V DC / AC Three Terminal Voltage Regulator Power Module E-888 Input Voltage: 15-24V DC/AC Output Voltage: 12V DC Max Current: 1.2A  

Arduino UNO R4 Wi-Fi ABX00087 E-887 Same form factor as UNO R3 Inbuilt Wi-Fi and Bluetooth Onboard 12×8 LED Matrix Extra onboard peripherals Inbuilt HID Support Expanded Memory and Faster Clock Speed than before

STMICROELECTRONICS B-G431B-ESC1 E-884 Electronic Speed Controller Discovery Kit, STM32G431CB, 32 Bit, ARM Cortex-M4F, for Drones

RC Absorption/Snubber Circuit Module Relay Contact Protection Resistance Surge E-883 Contact Load: Low Power Power Source: AC/DC inductive load: >1000Wc Input Supply: 5 ~ 400V (AC/DC) Connector Type: 2 Pin Screw Terminal BZ-127

NanoVNA-F V2 50kHz-3GHz IPS 4.3Inch LCD Display Vector Network Analyzer S-A-A-2 Antenna Analyzer Sho E-880 Measurement frequency: 50KHz -3GHz Display: 4.3inch, Resolution 800*480 Battery: 5000mAh Li-ion Battery RF output power: -9dBm (error within 1GHz: ±1dB) Frequency accuracy: <0.5ppm S21 dynamic range: 70dB (1.5GHz), 60dB (3GHz) S11 dynamic range: 50dB (1.5GHz), 40dB (3GHz) 2-port return loss: 20dB typ (1.5GHz), 13dB min (3GHz) Number of calibration points: 101 points Number of scanning points: 101 points Number of traces: 4 Number of mark points: 4 (the mark point bar can be moved up and down on the screen) Setting save: 5 groups (after saving, it can be directly recalled when it is used next time, no need to recalibrate, and the saved parameters before the last shutdown will be automatically recalled when it is turned on next time) Support calibration result interpolation, can measure without recalibration after adjusting the measurement frequency band Scan time: about 1.9s/1 time (50kHz ~ 3000MHz full frequency band)

CP2112 debug board USB to I2C Communication Module E-879 On-chip power-on reset circuit, on-chip voltage regulator: 3.45 V output Compliant with USB specification 2.0 standard; full speed (12Mbps) USB suspend status via SUSPEND and /SUSPEND pins Integrated 194-byte one-time programmable ROM for storing customizable product information 512-byte SMBus data buffer, configurable clock speed device address 7-bit value is the slave address of CP2112 Windows, Mac, and Linux HID to SMBus libraries API for rapid application development, open-access interface specifications. 8 GPIOs can be configured as input/output and open-drain/push-pull, configurable clock output for external devices 48MHz to 94kHz, switching LEDs during reading/write SMBus