Many many people have asked, so I have modified the design to support the addition of Minute LEDs on my clock. You are welcome to add them around the corners, or in a straight line if you like.There is new firmware for the PIC micro - but the firmware does not mind if the LEDs are there or not - meaning that if you would like to have the minute LEDs you can add them, and if you don't want them, you don't have to have them.Start by downloading the new firmware into your micro - you can find the HEX file for your micro attached to this page.Then, we need to add the cabling for the LEDs onto the back of the controller board - There are a few spare pins that are not really used that we can use for the minute LEDs.

LED1 - Pin17

LED2 - Pin18

LED3 - Pin10

LED4 - Pin33

Ground - Pin12

Simply connect some 5 conductor ribon cable to the pads shown above.



Drill some holes in the front of the clock for the LEDs in each corner and mount the LEDs using a small amount of hot melt glue. Solder a 270 Ohm resistor to each cathode (Short lead), and wire the ground lead from your 5 conductor cable to each resistor.



Finally, connect the LED leads to the anode of each LED, and tidy up your wiring.



When the clock is turned on – the self test will cycle through all of the LEDs to re-assure you that you have connected them correctly.



Simple as that - You may mount your minute LEDs however you like.



the photos I have attached should be helpful!



Finally - Remember when you download the files - you will need to rename the file with the correct extension .c .h, and .hex depending on which file you downloaded.