Author Topic: Counter Circuit Troubleshooting  (Read 1609 times)

0 Members and 1 Guest are viewing this topic.

Offline infernowheelsTopic starter

  • Newbie
  • Posts: 1
Counter Circuit Troubleshooting
« on: March 29, 2015, 08:58:48 am »
Hey guys, so we were asked to follow this circuit design:
https://app.box.com/s/nuqszc1dts3sm6l9hoi2noud6704eicv

Now I've followed the given paper to me as best as I could but I still have 2 problems with
my design right now:
>When it's powered on, the ones digit counter has to start from zero instead of one
>The circuit has to reset after it reaches 60.

Check this video for reference and feel free to point out any more problems~
https://youtu.be/sYe8vIriKao


Some pictures of what I made:


 

Offline T3sl4co1l

  • Super Contributor
  • ***
  • Posts: 21674
  • Country: us
  • Expert, Analog Electronics, PCB Layout, EMC
    • Seven Transistor Labs
Re: Counter Circuit Troubleshooting
« Reply #1 on: March 29, 2015, 04:15:03 pm »
I don't see any bypass caps, anywhere.  If it runs smoothly at all, I'll be surprised!

Typically you need a 0.1uF ceramic for each chip, VCC to GND.

So, you need to add a conditional reset state?  Have you covered AND/OR gates or digital comparators yet?

Tim
Seven Transistor Labs, LLC
Electronic design, from concept to prototype.
Bringing a project to life?  Send me a message!
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf