prop or basic stmap frequcny meter design

Comments

• Leon Posts: 7,620

  2010-03-27 22:04 edited 2010-03-27 22:04

  Frequency? Signal level?
  
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  Leon Heller
  Amateur radio callsign: G1HSM
  
  Post Edited (Leon) : 3/27/2010 11:14:17 PM GMT
• mikediv Posts: 825

  2010-03-28 13:34 edited 2010-03-28 13:34

  Hey Leon ,, I built a signal generator just for kicks for now and I wanted to calibrate it ,, So I would say 20 Meg max down into the 20Ks I was using my scope but I would like to see a hard number,,,, I know you can pick them up cheap online I found a few for 100 bucks
  they were pretty nice. But to be honest I really don't need it so if I could build one with the parts I have it would be cool. I tried searching the Parallax site but the search just done not work for me. I thought I remembered someone building one using the 4X20 and a basic stamp or
  homework board ,, someone emailed they thought there was a project for the Hydra but I can not find that either
• Leon Posts: 7,620

  2010-03-28 17:16 edited 2010-03-28 17:16

  One of the many simple PIC counters that are all over the place will do what you want, and will be cheaper and easier than using a Propeller. You could use a Propeller, of course. You will need an input circuit for it; you could use one of the circuits that are used with a PIC. Sort out the display first, and then write the software for one of the timers.
  
  I don't think that the Stamp will be suitable, because of the limited frequency range it can handle without external hardware.
  
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  Leon Heller
  Amateur radio callsign: G1HSM
  
  Post Edited (Leon) : 3/28/2010 5:38:17 PM GMT
• hover1 Posts: 1,929

  2010-03-28 18:00 edited 2010-03-28 18:00

  Mike,
  
  Would this help?
  
  ·http://obex.parallax.com/objects/479/
  
  It's only good to the accuarcy of your crystal.
  
  
  Jim