{"id":1576,"date":"2013-04-11T09:50:25","date_gmt":"2013-04-11T12:50:25","guid":{"rendered":"http:\/\/blog.generaleccentric.net\/?p=1576"},"modified":"2013-05-21T19:57:44","modified_gmt":"2013-05-21T22:57:44","slug":"clock-with-tics-using-jy-mcu-3208-module","status":"publish","type":"post","link":"https:\/\/blog.generaleccentric.net\/?p=1576","title":{"rendered":"\u201cClock with Tics\u201d using JY-MCU 3208 module"},"content":{"rendered":"
\"JY-MCU<\/a>
JY-MCU 3208 Clock with Tics<\/figcaption><\/figure>\n

The \u201cClock with Tics\u201d project now comes in two production models:<\/p>\n

    \n
  1. Using the SURE 0832 module<\/a> \u2014 the same module used in Media Circus<\/span><\/li>\n
  2. Using the JY-MCU 3208 module<\/a><\/span><\/li>\n<\/ol>\n

    The SURE module is an LED matrix with a LED matrix controller built-in. A hand-wired board featuring an ATMEGA328 microcontroller, a DS-1307 battery chip with a button clock backup, and a 5v high-efficiency regulator drives the SURE module.<\/p>\n

    The JY-MCU 3208 also has the same matrix controller, but also includes an ATMEGA8 controller; no extra wiring is required except for a light sensor attached to a spare data input pin on the ATMEGA.<\/p>\n

    The JY-MCU 3208 currently sells for just over $12 at DealExtreme.com. It arrives with software that displays date and time using Chinese characters. Fortunately, the module includes a standard six-pin ISP connector that allows hobbyists to upload their own code using AVRISP mkII<\/a> or other In-System Programmers. This version would not be possible without the replacement code provided by\u00a0DrJones<\/a>.<\/p>\n

    The ATMEGA8 does time-keeping using interrupts, and the program is uploaded to the module using the built-in ISP connector. This is a bare-bones design that does not have a voltage regulator, so you must be diligent in selecting a power adapter that delivers regulated 5v to the unit. I’ve blown a couple of the modules through inattention and stupidity.<\/p>\n

    My modifications to DrJones\u2019 code include:<\/p>\n