One runs at 3.3V and 8 MHz, the other at 5V and 16 MHz. Both are 16 MHz (although the 3V Arduino Pros run at 8MHz) Power There are two version of each of the Arduinos. It does work so far, but still I made a mistake. Id like to know the differences between these two boards: Arduino Pro Mini and Arduino Pro Micro. If the NRF24L01 was being powered by Vcc when you made this measurement, it is probably damaged. If my usb-serial has a 3.3V power output, is it still not good to use it with? There is a voltage regulator on board so it can accept voltage up to 12VDC. I see there is special usb-serial adapter for 3.3V Arduino: The Arduino Pro Mini can be powered with an FTDI cable or breakout board connected to its six pin header, or with a regulated 3.3V or 5V supply (depending on the model) on the Vcc pin. It would probably be OK, but something to keep in mind. If the output of TX signal from that adapter is above 3.3V, supplying 3.3V to the Arduino would cause you to exceed the VCC on the RX pin of the Arduino, which would be bad. I have wondered about that style of adapter for a while now. To buy 3. The pin layout is compatible with the Mini Arduino. I have connected it directly pulling out from 5V version of Pro mini. The Pro Mini Arduino is intended for semi-permanent installation in objects or exhibitions. I see a 3.3V output on the usb-serial, can you try that instead of the 5V ? That will increase the voltage to 4 or 5V, which is indeed bad for 3.3V devices. You connect the 5V from the USB to the VCC of the Pro Mini. Pro Mini 3.3V 8MHz - ATmega328P - PROMINI3.3V8M - Arduino Compatible - This Pro Mini 3.3V is based on the open source design of Arduino and is a copy of the.
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