Skip to content
This repository

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP

My simple code for a launchpad VFD clock

branch: master

Fetching latest commit…

Cannot retrieve the latest commit at this time

README.md

project0

My simple code for a launchpad VFD clock. Read the code for details, but the basic idea is:

On first power-up, the time is read via i2c from a DS1307 RTC chip. One input is connected to the square wave 1Hz output of the DS1307, and increments the second counter on an interrupt. One output is PWM'ed to drive a switch mode power supply that boosts 5v-50V for the tubes. Three outputs send data to the MAX6921 driver chip constantly to keep the persistence of vision effect working.

Something went wrong with that request. Please try again.