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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 generation。Automatic detection of deck。Specifications。Based on the CMT-1203-SMT。1-wire memory for automatic deck detection。Mechanical specification。Weight：1.8g。Size(WxHxD)：25x27x4mm。Designed for mounting above or under the Crazyflie 2.0。Part list。1×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 connectors。0.1"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 decks。Automatic detection of expansion deck。Electrical 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：3.8g。Size(WxHxD)：36x40x5mm。M3 mounting holes placed 30.5mm square.。Designed for mounting above or under the Crazyflie 2.0。Package contents：1×BigQuad deck。4×M2x4 nylon screw。2×M2x6 hex spacer

Strictly speaking、Booster-B24V2A5 is a dual H-bridge power driver、which integrates 24 N-Channel MOSFETs(with low Drain-Source On-Resistance、RDS(ON)<3mΩ)and various protections(reliable and flexible). It can be used for controlling the brushed DC motor、high-power LED and so on. In addition、it integrates RS485 and I2C into one connector、and they share the same user register、so it can be used via any one of the two interfaces at any time. All functions can be performed by reading or writing the user register、except for a few special operations(please refer to the corresponding communication protocols for details)、which is similar to the MCU operation.。Features：It integrates various protections(Under-Voltage、Over-Voltage、Over-Temperature、Over-Current、Out-Of-Control and Power-Reverse). The response-time of the Over-Current protection can be flexibly set and performed by hardware(comparator)、which makes the protection more timely and reliable.。There are 18 control modes for different applications(see below).。It integrates a stable and high-efficiency RS485、and the baud rate can be detected automatically. There is no instruction packet loss when the baud rate is not higher than 28800bps、otherwise the first instruction packet will be discarded. Furthermore、it is recommended to send the sync bytes(0xff 0xff 0xff 0xff)first when the baud rate is higher than 28800bps.。It integrates a stable and high-efficiency I2C.。Specification：Supply Voltage：DC 6 ～ 24V。Continuous Current：2 5A / 1 10A(Just limited by D-Sub connector、210A / 115A for mosfets and sampling resistors.)。Baudrate Range：1200 ～ 115200bps。I2C Speed：100KHz。Size：54.5mm 50mm 30.5mm(LWH)。We have adapters for this controller：GDA-HLB1，GDA-HLU1 and GDD-FAN.