Len sent in this great clock (schematic at the bottom of the site) – “It’s actually a pretty simple circuit. The clock is based on an Atmel AT89C2051 microcontroller. The software in the microcontroller handles the count for the time. It “talks” to a 4 channel Digital to Analog converter to derive the voltage to position the needles on the three meters. The outputs of the D2A converters are buffered with a quad amp. Otherwise the current draw of the 1ma meters would exceed the D2A converter. A Dallas DS1307 generates an accurate 1hz timing signal and also backs up the time setting in the case of a power failure. It’s very cool to watch the seconds meter raise as a minute progresses and them fall to zero again. The clock runs in a 24 hour mode.” – Link.
The Meter clock

- Like
- Digg
- Del
- Tumblr
- VKontakte
- Flattr
- Buffer
- Love This
- Odnoklassniki
- ManageWP.org
- Meneame
- Blogger
- Amazon
- Yahoo Mail
- Gmail
- AOL
- Newsvine
- HackerNews
- Evernote
- MySpace
- Mail.ru
- Viadeo
- Line
- Comments
- Yummly
- SMS
- Viber
- Telegram
- Subscribe
- Skype
- Facebook Messenger
- Kakao
- LiveJournal
- Yammer
- Edgar
- Fintel
- Mix
- Instapaper
- Copy Link
Advertisement