Of course, in addition to the five control lines, you need some handshaking lines, too so you could use as many as eight digital pins to control the device. The device in question is an ADG732.

It’s not a loosely defined analogue standard but a tightly controlled digital one upon which the clever hacks that eke full colour composite video from a single digital I/O pin will have little ...

However, Arduino also offers this board without headers ... These are completely isolated and can't be used as standard digital I/O pins unlike the Nano. You can only connect them to SPI ...

As a microcontroller with a limited number of I/O pins and no operating system, you may be tempted at first to pick a Raspberry Pi for your DIY project over an Arduino. However, the Arduino can ...