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Sometimes LED feedback isn't enough、like when you're flying around in a lab or a living room. With the buzzer deck you'll get audio feedback on system events、like low battery or charging completed. Or why not create your own melodies that will play while you're buzzing around. To get started using the buzzer deck there's already a few melodies pre-programmed in the Crazyflie 2.0 latest firmware.This product is intended to be used together with the Crazyflie 2.0 nano quadcopter and uses its expansion board system. Please have a look at the buyers guide for more info about the Crazyflie 2.0 ecosystem. For more information about how to use the expansion decks check out the getting started with expansion decks page.Features：Low profile piezo buzzer for tone and melody generationAutomatic detection of deckSpecificationsBased on the CMT-1203-SMT1-wire memory for automatic deck detectionMechanical specificationWeight：1.8gSize(WxHxD)：25x27x4mmDesigned for mounting above or under the Crazyflie 2.0Part list1×Buzzer deck

With the BigQuad deck you can transform your Crazyflie 2.0 to a bigger quad by connecting external ESCs(Electronic Speed Controller)to the breakout connectors on the deck. The autodetection of the deck makes this transformation possible to do in seconds. The deck contains breakout header connectors for additional accessories such as external receiver(CPPM input)and GPS. It also has the possibility to monitor battery voltage and current.This product is intended to be used together with the Crazyflie 2.0 quadcopter and uses its expansion board system. Please have a look at the buyers guide for more info about the Crazyflie 2.0 ecosystem. For more information about how to use the expansion decks check out the getting started with expansion decks page.Early Access：This product is currently part of the early access program. This means the hardware is ready and low level tested but the firmware/software is still in a very rudimentary state、there are probably basic drivers for communicating with the hardware、but no higher level functionality.Features：4×ESC connectors0.1"header mounting holes for additional connectivity：CPPM input(3 pin)GPS input(4 pin)I2C expansion(4 pin)Battery and current monitoring input(3 pin)Buzzer output(2 pin)Connect one or two additional decksAutomatic detection of expansion deckElectrical specification：Power Crazyflie 2.0 with 4.5V - 5.5V from ESC.BiqQuad deck inputs are 5V tolerant.Battery voltage monitoring divider scaled for input up to 23V.Current monitoring input 0V - 3V.BiqQuad deck and Crazyflie 2.0 current consumption：～120mA without any additional decks.Up to 500mA if Crazyflie 2.0 battery is connected and charging.1-wire memory for automatic expansion deck detection.Mechanical specification：Weight：3.8gSize(WxHxD)：36x40x5mmM3 mounting holes placed 30.5mm square.Designed for mounting above or under the Crazyflie 2.0Package contents：1×BigQuad deck4×M2x4 nylon screw2×M2x6 hex spacer