Bubble display alarm clock

Posted on Monday, June 2nd, 2014 in project logs by DP


Markus Gritsch build another bedside table alarm clock, the schematic and source code is available here:

recently some vintage bubble displays popped up at various places [1][2], so I felt the urge to build another bedside table alarm clock, this time a really tiny one, roughly the size of an AAA battery.

Check out the video after the break.

This entry was posted on Monday, June 2nd, 2014 at 11:00 am and is filed under project logs. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.

7 Responses to “Bubble display alarm clock”

  1. @f4grx says:

    Very nice, I love it !

  2. Chris Chung says:

    Nice project.

    I have the same MCU (msp430g2452), same bubble display x 2, lot more buttons…. gives you a calculator.

    There is no write-up yet.

  3. octal says:

    it’s amazing to use one of the low energy consumption microcontrollers on earth with one of the more energy hungry displays :) it’s a pitty we can’t find such nice extra-small displays made with new low energy and high luminosity LEDs.

    cool project :)

  4. Mike says:

    A-ha! I’ve got a similar 9-digit bubble display lying around (for a calculator, I suppose). Thought of hooking it up to an atMega or atTiny, but couldn’t think what for. Maybe I’ll just make a dual time zone clock, or time+alarm display. Need to have a look at the tech specs of your clock chip…

    Thanks for sharing your ideas!

  5. What’s the power source? Is it only 1.5V?

Leave a Reply

Notify me of followup comments via e-mail. You can also subscribe without commenting.

Recent Comments

  • Pekka Akselin: This is ridiculous!? :-) We are back at 256(!) byte EPROMs that needed multiple, a handful, of voltages to run! :-(
  • KH: Let's try a back-of-envelope calc balancing energies. From MCP1700 datasheet, there are graphs for a 200mA load step. Estimate the energy shortfall as 12uJ. Say...
  • Daniel: It's been a week and my comment is still awaiting moderation. Apparently the CIA doesn't want their involvement known?
  • KH: Agree, so okay, I guess he must have learned from somewhere. 100nF and 1000uF is so far apart, that was jarring; it's more magic incantation...
  • Max: I have a suspicion the hefty electrolytic cap might be some sort of cargo cult carry-over from other RF-based projects - for instance, I've seen...