Question

With the Arduino Mini, in the absence of an inbuilt USB connector on the board. How is one supposed to connect it to the computer?

(a) Ethernet Adapter

(b) SPI

(c) I2C

(d) RS232 to TTL Serial Adapter

The question was posed to me during an internship interview.

This key question is from Uses for Different Arduino Boards topic in section Board Specifications and Types of Arduino

Answer 1

Correct answer is (d) RS232 to TTL Serial Adapter

To explain I would say: The Arduino Mini does not have an inbuilt USB port and so it can be programmed with any USB Serial to TTL adapter. It contains 14 IO pins of which 6 support PWM. It comes in 2 variants, one with the Atmega168 and the other with the Atmega328 which is a much more recent release of this board.