Pop-UP Clock… now in colour!

The Pop-Up Clock described in a recent post “Pop-Up Clock and Flipper Clock – Magnetic Digit Elements” is a work-in-progress proof of concept as I develop a full 4-digit clock (complete with flashing colon).

So far, the design displays the time on this single digit display in a sequential manner: two digits for the hour, then a dash (“-“) followed by two digits for the minutes.

Wishing to increase the illumination of the display and the contrast of the segments between ON and OFF (or IN and OUT) states, I made some changes. I added a strip of addressable WS2812 LEDs around the periphery of the display and blacked-out the rear of each segment so that little light passes into the HDPE when it is extended (OUT).  When retracted (IN), light from the LEDs shines into the elements and illuminates them.  In the software I reversed the direction of the segments so that when it is ON, it is retracted (IN).  Here’s a video that shows the effect.

This test shows considerable light bleed from the LED strip, and this shall be rectified when there is a fully enclosed baffle between the front plate and servo mount plate… In addition, I shall also increase the contrast of the segments with a better light seal.

As with many of my clocks, the accurate time is obtained from an NTP request to the US National Institute of Science and Technology (NIST) atomic clock server, using an ESP8266 WeMost D1 Mini WiFi module.  WiFi channel access parameters, local time relative to GMT, daylight savings active, and duration between display updates (minutes) are entered on its web server and subsequently stored in EEPROM when the unit is powered on for the first time, or if it fails to connect to the local WiFi channel.

Oh yes, and just for Lise, the display its blue!

 

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