Use for DMM square wave output - diyAudio
Go Back   Home > Forums > General Interest > Everything Else
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Everything Else Anything related to audio / video / electronics etc) BUT remember- we have many new forums where your thread may now fit! .... Parts, Equipment & Tools, Construction Tips, Software Tools......

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 11th June 2009, 09:30 AM   #1
Stuey is offline Stuey  Australia
diyAudio Member
Join Date: Mar 2006
Location: Perth, Western Australia
Default Use for DMM square wave output

Hi all,

I've just bought a cheap tiny DMM to throw in my car tool box, and it has a 50 Hz square wave output.

What are the uses for this?


  Reply With Quote
Old 11th June 2009, 09:59 AM   #2
diyAudio Member
Frank Berry's Avatar
Join Date: Sep 2003
Location: Midland, Michigan
How odd.
I've seen DMM's with frequency readouts but never one with a squarewave oscillator.
Who made it? Model number?
  Reply With Quote
Old 11th June 2009, 12:45 PM   #3
Stuey is offline Stuey  Australia
diyAudio Member
Join Date: Mar 2006
Location: Perth, Western Australia
It's a real cheapy - a UNI-T UT20B.

I bought it simply because of its tiny size and price - it's about 3" x1.5" and weighs 100g with battery and was a mere $9 - including the battery!

I have another couple of better meters but they are a bit unweildy to keep in a gereral purpose tool box.

I actually found on the web some high end meters such as Agilent's with this feature, but no explanation of what it's for. I also found some suggestions that it's for logic testing, but that's well out of my sphere of knowledge. Yet another site speculated about it being to test audio amplifiers.


  Reply With Quote
Old 12th June 2009, 12:42 AM   #4
Eva is online now Eva  Spain
diyAudio Member
Eva's Avatar
Join Date: Oct 2003
Location: Near the sea
Send a message via MSN to Eva
Basic transformer testing, basic inductor and capacitor testing, logic testing...
I use to feel like the small child in The Emperor's New Clothes tale
  Reply With Quote
Old 12th June 2009, 02:48 AM   #5
star882 is offline star882  United States
diyAudio Member
star882's Avatar
Join Date: Mar 2007
In my ENGR 111 class, the meters supplied had a very simple signal generator. (Of course, I brought my own meter since I knew they aren't going to have any good stuff in that class.) It was fixed at about 55Hz and I don't think it would be very stable.

About the only real application I can think of is simple go/no go audio equipment testing. Even a simple 555-based signal generator is much more useful for real testing.
"Fully on MOSFET = closed switch, Fully off MOSFET = open switch, Half on MOSFET = poor imitation of Tiffany Yep." - also applies to IGBTs!
  Reply With Quote


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Sine wave - Square & Triangle wave generator using Transistors / OP-Amps lineup Solid State 20 9th October 2006 12:15 AM
10 KHz Square wave output? mura Solid State 17 31st May 2005 12:19 AM
Microphone turns triangle wave into square wave? Circlotron Analogue Source 18 25th January 2003 06:44 AM

New To Site? Need Help?

All times are GMT. The time now is 05:05 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2