Tell us about yourself!
There is no audio INPUT on a Raspberry without using a USB sound card or an add on Audio DAC HAT (or pHAT).
It's the way it's wired on a Raspberry.http://www.raspberrypi-spy.co.uk/2014/07/raspberry...I've no idea why this instructable exists. Using a TRRS plug is easiest for analog audio and analog video.
Your TRRS diagram is wrong. It's left audio on the tip, right audio on the first ring.
Fair point.When I bothered with a digital wrist watch I always had it on military time so didn't need an AM/PM anyway. I'm from the generation that thought digital watches were a neat new idea.
My binary clock (which I've owned for years) has six columns of LEDs. That means it can count seconds and display hours in 24h (0-23) format.With your clock you really need an extra AM/PM indicator since it only has a single BCD column for the hour.