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The Microduino-Core+ is an upgrade to the Microduino-Core. The Core+ currently ships with a 16MHz, 5V ATmega644PA, but options are in the works for a 3.3V version and both 5V and 3.3V ATmega1284P MCUs. The Microduino Core+ has more memory and I/O than the Microduino-Core, and uses the same 27-pin bus, called the "UPin-27". At 1.0 inches by 1.1 inches, these things are small. The Core+ has a set of 10 pads for the additional I/O lines.
The device is pretty much useless without the FT232R module, at least for programming. Once it is programmed, that module can be removed, and the rest left to run on their own. But the power is supplied by the FT232R module - both the 5V and the 3.3V supplies. So you need to either use the battery management board or rig up something. After reading the supplier's info on the battery management (BM) module, we decided to kludge up a simple voltage regulator board, using a couple of LDO regulators and a piece of perfboard.
|Operating Voltage||5 / 3.3|
|Test Current Draw||24.3mA@5V|
|Web Site||Microduino Studio|