Worldclock is a clock that displays the time with words.

All the words needed to display any possible time are available and only the ones
required to display the (approximate) current time are turned on.
The time will be accurate to within five minutes. 

Our first thought was to use the five minute time closest to the current time 
so we're never more than 2.5 minutes out.  

Another suggestion was to switch to the correct time at every
five minute boundary, then maintain that to the next five minute boundary.

The second idea is liekly easier to program and would require less explaining
to people.


Some suggested layouts:

Half Quarter
Twenty Five Ten
Past To One Two
Three Four Five
Six Seven Eight
Nine Ten Eleven
Twelve O'Clock

Ten Quarter Twenty Five
Half Past To One Two
Three Four Five Six
Seven Eight Nine Ten
Eleven Twelve O'Clock



IO on the JEDmicro AVR200 board:

PA0 - ADC0, LDR input (swap with PD6, with PCB mod)
PA1 - FET output
PA2 - FET output
PA3 - FET output
PA4 - FET output
PA5 - FET output
PA6 - FET output
PA7 - FET output

PB0 - FET ouput
PB1 - FET ouput
PB2 - FET ouput (INT2, not used for RTC, with PCB mod)
PB3 - FET ouput
PB4 -
PB5 - MOSI, ISP, button
PB6 - MISO, ISP, button
PB7 - SCK, ISP, button

PC0 - SCL
PC1 - SDA
PC2 - FET output
PC3 - FET output
PC4 - FET output
PC5 - FET output
PC6 - FET output
PC7 - FET output

PD0 - RXD
PD1 - TXD
PD2 - INT0, from RTC (with PCB mod)
PD3 -
PD4 - FET output
PD5 - FET output
PD6 - FET output (swap with PA0, with PCB mod)
PD7 - OC2, LED PWM