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Raspberry Pi 2 B 40 pin GPIO Reference BoardThis is a 40 pin GPIO Reference Board For Raspberry Pi B+/Respberry Pi 2.A simple gadget that can be put onto the GPIO header of a Raspberry Pi so that you can tell what pin does what. This handy reference board makes putting projects together simple ..

MQ-8 Hydrogen Gas Sensor Module H2 Alarm DetectionFeatures-Using the high-quality dual-panel design, with power indicator and TTL signal output instructions.The switching signal having a DO (TTL) output and analog output AO.TTL output valid signal is low. ( Low-level signal when the output light can..

MQ-2 Smoke LPG Butane Hydrogen Gas Sensor Detector ModuleFeatures-Good sensitivity to Combustible gas in a wide rangeHigh sensitivity to LPG, Propane, and HydrogenLong life and low costSimple drive circuitCan be used as a Digital or analog sensor..

3 Channel Path Tracing ModuleFeatures:3 channel tracking sensors, must-have in your Arduino DIY Robot Projects;Uses infrared light detection, anti-jamming capability, using CTRT5000 sensor, adjustable sensitivity, stable performance;Working voltage: 5VWith lights, a fixed bolt hole for easy installa..

Nano CH340 Chip Board Without USB Cable Compatible with Arduino (Soldered)Features-1 pair of TTL level serial transceiver ports RX / TXUsing Atmel Atmega328P-AU MCUThere is a bootloader installed in itSupport USB download and PowerSupport for external 5V ~ 12V DC power supplySupport power supply by ..