 
        
           
        
          Development board with ATmega328P microcontroller compatible with Arduino Uno Rev3. The board at the user's disposal offers 14 I/O lines (6 of them can work as PWM outputs), 8 analog inputs, 16 MHz quartz, USB connector, power connector, ICSP programmer connector and RESET button. Thanks to the uploaded bootloader, no external programmer is needed for programming.

| 1. ATmega328P-AU | 10. Power supply DC 7-12 V | 
| 2. 3,3 V Regulator AMS1117-3.3 | 11. Reset | 
| 3. 5 V Regulator NCP1119ST50T3G | 12. Power LED | 
| 4. FT232RL | 13. LED TX/RX | 
| 5. Arduino Interface | 14. User LED | 
| 6. ICSP Interface | 15. Fuse 0,5 A | 
| 7. microUSB | 16. Power supply configuration | 
| 8. Power supply pins header | 17. Bootloader switch | 
| 9. FT232 pins | 
The manufacturer has introduced several modifications that significantly improve the work with the R3 PLUS.
| R3 PLUS | OFFICIAL R3 | REMARKS | |
|---|---|---|---|
| Operating voltage | 5V/3.3V | 5V | Dual voltage level to support more shields | 
| Reset | Lateral | Vertical | Lateral button is easier to use when connecting with shield | 
| Bootloader switch | Yes | None | The board can be configured to run program immediately when power-up by the switch | 
| USB connector | Micro USB | USB Type B | Micro connector is more commonly used, and shields won't be blocked anymore while connecting | 
| DC jack | Low profile | Normal height | Shields won't be blocked anymore while connecting | 
| Power output header | Yes | None | Providing 5V/3.3V power output OR common-grounding with other boards | 
| 3.3V power output | 800mA Max | 150mA Max | R3 PLUS features higher driving capability | 
| Oscillator | Crystal oscillator | Ceramic resonator | Crystal oscillator is suit for applications where accurate clock reference is required | 
| ADC channel | 8 | 6 | CFG used as ADC6 by configuration, and ADC7 from the Reserved PIN | 
| Connecting with prototype breadboard | Supported | Not supported | Solder pads is provided for DIY interfaces to connecting with prototype breadboard | 
| USB driver | Compatible with all main systems | Doesn't compatible with WIN7/WIN8 Express Edition | Driver will never failed to install thanks to the onboard FT232 | 
| Firmware fixing | Supported | Not supported | Firmware can be fixed by using the onboard FT232, no extra programmer is needed | 
Data sheet
Manufacturer BTC Korporacja sp. z o. o. Lwowska 5 05-120 Legionowo Poland sprzedaz@kamami.pl 22 767 36 20
Responsible person BTC Korporacja sp. z o. o. Lwowska 5 05-120 Legionowo Poland sprzedaz@kamami.pl 22 767 36 20
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