Arduino Nano CH340 – Compatible
Highlights:
1. Operating Voltage (logic level): 5V
2. 8 analog inputs ports: A0 ~ A7
3. 14 Digital input / output ports: TX, RX, D2 ~ D13
4. 1 pair of TTL level serial transceiver ports RX / TX
5. Using Atmel Atmega328P-AU MCU
6. Standard 0.1” spacing DIP (breadboard friendly).
Arduino Pro Micro 5v/16M – Compatible
Highlights:
1. ATMEGA32U4 running in 5V / 16MHz
2. Support Arduino IDE V1.0.1
3. Micro USB interface programming on the board
4. Four 10-bit ADC pin
5. 12 digital I / O (5 PWM capability)
6. Rx and Tx hardware serial connection
Nano Expansion Shield For Arduino
Highlights:
1. Compatible with Arduino NANO
2. All digital and analog pins breakout
3. Compact size;
4. External power supply current support
5. Leads all pins out, convenient for wiring and doing experiments.