Help Please

Discussion in 'General Electronics Chat' started by Mr.D, Jun 22, 2011.

  1. Mr.D

    Thread Starter New Member

    Jun 22, 2011
    I stumbled on this site and think I may have found the right Group !
    I am a motorcycle mechanic looking for a 5 volt DC square wave generator.
    My goal is to test electronic speedometers that operate off a 5 volt pulse.
    The manufacture told me I could buy this at Radio Shack
    The kid at the Shack had no Idea what I was talking about
    Any Help would be great.


    Thank You
    Last edited by a moderator: Jun 22, 2011
  2. someonesdad

    Senior Member

    Jul 7, 2009
    You should draw a picture of the waveform you want along with any accuracy specs and frequency range. Do you need to vary the pulse width?

    If you want a simple 0 to 5 volt square wave, you could use this for $100. Just plug in a battery and start generating waveforms. It has a BNC output, so you may need an adapter of some kind. You just press the buttons to get the frequency you want. It also has a sine wave generator that can output more than 3 volts. They're useful as a hand-held battery-operated signal generator in the lab.

    There are also lots of 555 timer circuits available, so you could roll your own if you want for a lot less than $100. But it won't have the sub-0.1% frequency accuracy.