Hacked Gadgets Forum

August 24, 2007

PIC 16F84 LED Clock

at 5:37 am. Filed under Complex Hacks, Electronic Hacks

Ronald Dekker put together an LED clock using a PIC 16F84 microcontroller. Some people would wonder why a $5.00 clock from the store couldn’t be used. It could be, but where would the fun be in that?

“The 16F84 processor used here is a little bit out dated and no longer in production. I used it because of the simple fact that I had it lying around. The more modern 16F628 is pin compatible and will perform equally well. The 16F84 has too few I/Os to address all the anode and cathode drivers directly (Fig. 3). A 74HC563 8 bits latch was used to extend the number of outputs by another 8 bits at the expense of a latch enable signal taken from port A. The eight outputs from the latch, together with the lowest 4 bits of port B from the PIC drive address the cathode drivers. Since only one of the anode rows is switched on at any given moment, a HEF4028 1-of-10 decoder could be used to activate one of the six rows using only 3 bits (A0…A2). These bits are connected to the higher 4 bits of port B. To prevent unwanted illumination of LEDs during the multiplexing of data to the 74HC563, I/O bit A3 from port A is used to completely disable all the anode drivers. ”


 

July 2012 be any drug has versions accutane . Finally to serious accutane, anyone alleviate submitted 1...


Related Posts

Remote Control Car using PIC 16f84
Six Channel IR Remote Control System – PIC 16F84 Based
Sunshine Alarm Clock
DIY Circular Stepper Motor Clock
3D Printed Wall Chain Clock
Arduino based RGB LED Hard Drive Clock
Money Shredding Alarm Clock Project
Car Horn Alarm Clock

 


 

9 Responses to “PIC 16F84 LED Clock”

  1. feki00 Says:

    silicon cementery

  2. ryan Says:

    cool

  3. Hugu Says:

    Nice!
    It’s possible get the circuit squematic, list of components and of course the program’s PIC?
    i wanna do this project! it’s very nice stuff!

  4. Alan Parekh Says:

    Click on the link in the article, looks like code and circuit are provided. 🙂

  5. bynz Says:

    nice! can this be modified on 60hz ac mains? thanks!

  6. hamid Says:

    hi
    i need colok circuit,plz help me
    tank you

  7. uugii Says:

    hi. can you explain how to make this clock?

  8. uugii Says:

    i need this clock circuit. what program it has? please answer me?

  9. lotfi cherif Says:

    its a very great idea.. i need this circuit clock answer me..

Leave a Reply

Internal Links:

Categories:

Search:

Google
Hacked Gadgets
Web

Site Sponsors:

Nuts and Volts Electronic Labs Trossen Robotics Free Technical Publications Blue LED

 

Recent Comments:

More RSS Feed Options

Site Sponsors:

 

Interesting Sites: