Keyestudio PRO MICRO development board is compatible with all Arduino skills, including four analog inputs, five PWM pins, twelve digital inputs/outputs and hardware serial port Rx and Tx. Its operating voltage is 3.3V and working frequency is 8MHz, which can accept external supply voltage up to DC 16V. The anode of power supply board must be connected to the "RAW" . We also added a PTC fuse and diode to protect power supply circuit. In choosing test program, Arduino IDE version must be advanced or equal than the 1.0.3 version.
VCC: 3.3V at 500mA
Digital I/O Pins: 12 (of which 5 provide PWM output)
Analog Input Pins: 4
Maximum current for chip: 200mA
Maximum current per pin: 40mA
Recommended current per pin: 20mA
Flash Program Memory: 32kB
8-bit Atmel AVR
Internal SRAM 2.5kB
High Speed PWM with programmable
resolution from 2-11 bits
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