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644/1284 Wide is the answer to your need for more memory and power versatility in Arduino projects. These ATmega644 & ATmega1284-based Arduino-compatible boards give you two to eight times as much flash and RAM memory and are available in 3.3 V, 5 V, and 5 V high-power variants. Does your project need more resources than are available on a Nano, UNO, Leonardo, or even Mega2560 Arduino board? Does it need to run at 3.3 V or 5 V? Does it need to drive power components? If so, at least one of these six Wide boards will make your job much easier.
We considered a wide range of useful parameters when designing these boards. For example, many new chips work on 3.3 V, so it is useful to have a board running at this voltage. Another important requirement was the ability to drive power components, like MOSFETs, since you can’t power a MOSFET with a basic microcontroller board. The power capabilities of typical microcontroller boards are quite limited. Arduino boards are made for treating signals, not driving anything. This is a problem, because many users want to be able to drive a led strip, a motor, a power circuit, etc. Which is where Wide boards come in.
The voltage regulator on our 644 Power and 1284 Power boards is made of a DC/DC circuit. This allows the user to power the board with anywhere from 6 V to 24 V and consume up to 1200 mA of current at 5 V. This is not possible with a linear regulator, which would burn or limit the current because the current becomes too important and/or because the dropout voltage is too high.
Seven I/O outputs are converted into open drain switches that can sink 600 mA each. At 15 times the microcontroller’s maximum output-current capability per pin, this makes Wide Power boards appropriate for many applications, including driving unipolar stepper motors and power relays directly, without the need for a separate shield.
But that’s not all! Since many projects nowadays require some kind of visual display, and since these boards have more than enough memory to drive a screen, we have added a port that you can use to connect a 0.96-inch OLED I²C module. Zero wiring necessary! Now you can use your board to implement a menu or to log information without the need for a serial monitor!
You can find all available document files, including a work-in-progress user manual, on GitHub.
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