Tag Archives: Display

Raspberry Pi Ultrasonic digital clock

Imagine you waking up sometime in middle of night and want to know what time it is. Well you have your favorite toy – the mobile handset – but that is not supposed to be healthy alongside your sleeping brain! The florescent hands of a wall clock fade out after an hour or so when lights are switched off. On the other hand, to have a permanently ON digital clock is a bit disturbing.  I built this project to work as an on-demand clock and the demand is when you hold your hand or any object in front of it for a second or two. Isn’t that cool?! Read on to find out more…

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