This entry level Kit as quick and simple to-it-together activity for soldering education and just for fun. I designed it to assemble it together with my 6-years old son. End result is internet-synchronized digital clock, that helps my son to learn clocks and helps me sleep better, by hearing less of "Is it morning already, dad?" at 6 am.
When I did this clock project for myself I didn't realize that you'd need to configure time zone settings more than once. But after I start selling those on Tindie few people asked some advice on how to configure time zone without re-flashing firmware.
Although re-flashing LED clock if a good educational exercise, it make perfect sense to allow configuring TZ on the fly, by changing settings via UI. After some thinking I found even better way to approach this.
In the latest version clock will just request timezone settings based on location (and powered by IP geo-location services obviously). I'm still testing the whole flow, but so far it works perfectly.
I did few smaller improvements along the way, mostly to address other issues people contacted me about.
So now if Wifi connection is not available Clock will invite you on the screen to connect to the configuration AP. Also it will sync the clock little more often to pick up daylight saving time changes.
I love my clock ;) I have one just above my desk. Another one in kids bedroom. And another one at my mother's house. One thing that bothered me - absence of a case. I could make a 3D-printed case, but frankly always lacking time to do a good design. I can do some design in an evening, but to make a good design takes much more.
I decided to take a shortcut and order a acrylic case for now. It quite cheap (when ordered in quantities) and it actually looks surprisingly good. Bonus: Now I can keep the clock on the top of my display.
Make sure that all parts came in good shape and no apparent damage is done on the way.
Solder two 5-pin male headers to the screen
Disconnect 2 edge led matrix modules from the screen. Be careful not to bend the pins, otherwise it would be a lot of dancing to put them back later on. Don't worry about orientation, they have markings on one side
Solder Wemos D1 module - headers to module first
Solder headers to the Wemos D1 module. Long part of the header should be directed to the motherboard. Make sure to align them right, use motherboard as an aligning tool.
Start with just one pin each side and double check your work. Then you can proceed to other pins