What is it?

This current batch is ALL MADE WITH WHITE LEDs. Designed by David Johnson-Davies the Tiny Time Watch is a novel ATTINY85-20SU powered watch using 12 white or red LEDs, arranged like a clock face, to show the time analogue-style using a CR2032 battery. Two LEDs show the time; one LED lights to show the hour while the other LED flashes to indicate the minutes. One LED lighting up indicates both LEDs are pointing to the same hour mark. So for instance if you see one LED steadily glowing at the 6 position you would know it is 6:30PM. The watch only shows you the time to within five minutes, so it rounds up the time to the next five minute mark, so you are early rather than late for appointments! Another important detail The first version of the watch program displayed the hour number as a continuously illuminated light and the five minute mark as a flashing light, but for times after half past the hour this gave a confusing display. For example, for 2:50 the watch would light the 2 and 10 LEDs, but one's instinct is to read this as ten to two; ie 1:50. The current version therefore displays times later than half past the hour by lighting the next hour number, which gives a more familiar display. The Tiny Time Watch uses the ATtiny85's built-in oscillator, fine-tuned to get it as accurate as possible, and the watch keeps time to within a couple of minutes over 24 hours. NOTICE: CR2032 battery IS NOT included, strap or wristband NOT included with the watch. You can find 12MM watchbands for sale on the internet.

Why did you make it?

I read a post on David Johnson-Davies Arduino and AVR projects blog and immediately fell in love with this little watch. I ordered all the tiny SMT components I needed to make one and it turned out so nice I thought I'd go ahead share them with my fellow electronic enthusiasts here on Tindie if they wanted one for themselves. Wearing one of these on your wrist to a makerspace meeting should be fun!

What makes it special?

I'm just your average electronic hobbyist making things I find fun and useful and I like to share the things I make with men and women who also find these things fun and useful. I hand assemble each watch and reflow solder them in my Toast-R-Reflow oven here at my little one bedroom apartment home/workshop/laboratory in Austin Texas.