LED Binary Clock

Step 6 Finish

Solder the display PCB to the main clock PCB then all that is left is to connect the power.

The PSU needs to be at least 9v DC and need only be rated at about 200mA or so, the centre connector of the DC jack needs to be positive and the outer should be 0v.

Once the power is connected the clock should display 22:03:00 and immediately start counting the seconds. Then all that is left is to set the time, one of the buttons is used to set the minutes and the other sets the hours, as soon as either button is pressed it sets the seconds to 0 and increments the corresponding display by 1.

Comments

[moapz]

thanks eleven.
i create  it again, with new parts. the new one,work well.
thank you

[Muzamil Ali]

CAN YOU PLEASE SEND ME THE DETAILED NOTES OR CIRCUIT DIAGRAM OF THIS PROJECT...

[moapz]

hey. thank you for this.
it's finished, and work well :) but after 2day , it's off :( and i don't know why it is not work !
all LEDz is off!
i check voltages and it's good but i don't know why not work !
i changed all parts and create it again but not work !

[ElevenOf9]

Hmm, that's a tricky one, if it worked for 2 days then I don't see why it would suddenly  stop then. The first one I made I put the voltage regularor in backwards but that only worked for a few seconds before it burnt out. If you measure the voltage accross pins 5 & 14 on the PIC chip you should have 5 volts.

You asked in one of your other questions if you could use bell wire instead of the zero ohm links on the display PCB, if you did thta are you sure the wire isn't shorting out on the other tracks on the PCB? 

Try replacing the "1 second" LED (bottom right) to see if that makes any difference.

Try replacing the 3 transistors.

Th eone I made has been happily running for over a year now so I'm not sure what has gone wrong with yours, the only other thing I can think of is that there is a break in one of the tracks on the PCB, or a blob of solder is shorting something out.