Edison clock uses Ammeter plus bulbs to set alarm

This is the Edison clock, designed by [David Krawczyk]. It shows time in the same way as the multimeter clock, regulating power to two analog needle meters. The feature that makes this one a bit different is the alarm. You can see the series of holes on the front of the base. These have a small light bulb socked in each, and correspond to hours and 5-minute increments. Insert two bulbs to set the alarm time, and make sure that the alarm knob points to ‘on’. As you can see above, the alarm has been set to 8:15. Hidden on the last image of the article above is a PDF with just a bit more explanation. Still, much has been left out so if you replicate this clock we want to hear about it.

[via Gizmodo and Walyou]


  1. Joe says:

    Nice work. Now if only the bulbs were completely sealed, that would be bada$$.

  2. Buddy says:

    I’d remove the alarm on/off switch and just use the bulbs as the trigger. Not sure if there is an alarm sound to go with it but could use the fact that the circuit is closed and there is current going through it to drive a buzz relay connected to a speaker. Also, Edison was DC only!

  3. biozz says:

    screw edition he was a jurk XD Nikola Tesla contributed SOOO much more to science at the same time!

  4. dan fruzzetti says:

    I wish I could get up at 8:15 :/ that’s like, sleeping in for HOURS in my house.

  5. fartface says:

    Id rather see a Tesla Clock…

    Time displayed by a set of jacobs ladders and the alarm is a tesla coil lighting off loud sparks.

  6. tooth says:

    That is sweet!! I would love one of them. But i am stuck with the worlds first alarms that was made in the beginning of time. A wife.

  7. Bryan says:

    I wish there was some diagrams or ways to build this

    i’d love to tackle it

  8. Tesla clock would be cool.

    BTW Edison hired Tesla wayback when, he left because of a stupid decision by Edison not to pay out the money for redesigning a motor that he agreed to.
    IMHO that was the worst decision in history on Edison’s part, the money would have been pocket change.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s


Get every new post delivered to your Inbox.

Join 96,706 other followers