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Arduino Mega 2560 Rev3 microcontroller development board
The Arduino Mega 2560 Rev3 is a high-performance ATmega2560-based development board with 54 digital I/O pins, ideal for large and complex projects.
The Arduino Mega 2560 Rev3 Microcontroller Development Board is a powerful and versatile platform designed for complex electronics, robotics, and automation projects that require a large number of input/output pins. It is based on the ATmega2560 microcontroller, offering expanded memory and enhanced I/O capabilities compared to standard Arduino boards.
The board features 54 digital I/O pins (including 15 PWM outputs), 16 analog input pins, 4 UART serial ports, a 16 MHz crystal oscillator, USB connectivity, ICSP header, power jack, and reset button. It can be powered via USB or an external power supply, making it suitable for both development and standalone embedded systems.
Fully compatible with the Arduino IDE and a vast library ecosystem, the Arduino Mega 2560 Rev3 supports multiple sensors, motors, displays, shields, and communication modules simultaneously. Its robust design and high processing capacity make it ideal for 3D printers, CNC machines, robotics systems, industrial automation, and advanced IoT applications.

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- Shield type:Â Arduino Nano
- Firmware:Â GRBL
- Modular stepper motor drivers:Â 3
- Limit switches:Â 6
- Micro-stepping:Â 1/16
- Coolant enable
- Uses removable Pololu A4988 compatible stepper drivers. (A4988, DRV8825, and others) (Not Included)
- Jumpers to set the Micro-Stepping for the stepper drivers. (Some drivers like the DRV8825 can do up to 1/32 micro-stepping )
- Compact design.
- Runs on 12-36V DC. (At the moment only the Pololu DRV8825 drivers can handle up to 36V so please consider the operation voltage when powering the board.)
- Please note that this is an unassembled kit and needs soldering.
- Latest Arduino CNC Shield Version 3.51
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Text to Speech TTL Module (Serial to Speech)
-  Single row 0.1″ header for easy connection to a host system
- Power requirements: +5 VDC
- 30 mA idle
- 46-220 mA active (depending on speech parameters and output load)
- Â Communication: Asynchronous 9600 bps serial (8N1)
- Dimensions: 1.25″x1.5″x0.37″
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Text support rate is better
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 Interface operation is simpler
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5V single power supply.
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Output directly connected to the speaker, can drive 4 ohms 3W / 8 ohm 2W speakers
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Busy status output, can be connected to the microcontroller IO or indicator light, no need to be left floating.
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 Voice effect optimization
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 Module miniaturization and easy integration
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Dimension: 33*27.5mm
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With mounting holes

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