Romeo BLE - Placa Controladora para Robot Arduino com Bluetooth 4.0

This AA boost module integrates with TI's TPS61032 auxiliary chip, which is capable of producing 5V 1A with input above 1.8V . The only difference between V1 and V2 is to change the output current from 2A to 1A.

The MQ4 is used in gas leak detection equipment in the consumer and industrial markets, this sensor is suitable for detecting CH4 , natural gas , LNG , avoiding exposure to alcohol, kitchen smoke and cigarette smoke . Sensitivity can be adjusted by potentiometer

A large LED array panel of dots to connect to your PI, Arduino and more! This large, bright 512 LEDs  has integrated controller circuits designed to facilitate direct use on your board.