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2-10 VDC generator for testing

Discussion in 'Tools and Test Equip' started by otto, Sep 6, 2016.

  1. otto

    otto Bakery Chef

    Messages:
    19,776
    Location:
    in a van down by the river
    I want a small circuit board that takes 24 VAC in and has a variable 0-10 VDC output to test actuators with.
    I know that they're out there but just don't know what they're called. I do not want to spend $130 on a fancy digital display gizmo that I might use 2 times in 4 years.
    I used to have one but lost in the shuffle somewhere along the way. I need it to test the actuators on economizers so I know if they will need a new actuator or just the Jade controller and sensors.
    My old one looked something like this one.
    Capture.JPG
    Is there something I can get from a supplier? Or should I just get this from China for $6.00 on eBay.

    Thank you in advance for your considerate and thoughtful replies.
     
  2. otto

    otto Bakery Chef

    Messages:
    19,776
    Location:
    in a van down by the river
  3. LemonWizard

    LemonWizard Blinky Lights Wizard

    Messages:
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    Location:
    Ohighyo
    You know this will just end with the actuator dieing on you a month after you change the control right?
    :loltard:
     
    otto likes this.
  4. Timebuilder

    Timebuilder I live in moderation...

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  5. otto

    otto Bakery Chef

    Messages:
    19,776
    Location:
    in a van down by the river
    Had one recently, W7212 was all corroded up. Replaced with a Jad and new sensors. Damn actuator motor was bad. So I stole a good motor from a unit next to it. They needed a new motor sooner or later, now they won't need a motor until the next PM inspection. I are So Clever!
     
  6. NZ All Blacks Fan

    NZ All Blacks Fan Just Another swinging Dick

    Messages:
    9,285
    Location:
    West Coast - Canada
    spend the extra 75 cents get the digital display unit -treat your self
     
    crackertech likes this.
  7. crackertech

    crackertech assholiness *

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    :lachen:
     
  8. otto

    otto Bakery Chef

    Messages:
    19,776
    Location:
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    I'm kinda cheap.
     
  9. refrigerationtech

    refrigerationtech Nut Case!

    Messages:
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    Location:
    Cold Place
    I have a kele. used it on the Honeywell actuators seemed to do the job.
     
  10. Tap

    Tap i hate it when a velociraptor throws poop at me

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    I have the kele, but a 9v battery usually does the job
     
  11. otto

    otto Bakery Chef

    Messages:
    19,776
    Location:
    in a van down by the river
    I have a 9V battery, a new one even. Used it to test the one mentioned and it failed the test, used it to find a good motor to misappropriate.
    I also have a decade box, didn't have time to mess around, was wondering if I could put the decade box in series with the + to the DC signal and flip resistance switches to simulate lower voltage. Maybe I will play around with that this weekend.
     
    Tap likes this.
  12. otto

    otto Bakery Chef

    Messages:
    19,776
    Location:
    in a van down by the river
    That's the one I used to have on my truck. Hell, $5 on ebay, might as well order one of those, too.
     

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  13. Y7turbo

    Y7turbo New Member

    Messages:
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    Location:
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    A little searching and you can find info on how to build your own from scratch. I made one a few years ago, got all the parts from radio shack, spent maybe 50 bucks and a couple hours of my time. I found some plans online for a 4-20ma signal generator then I added an additional switch and 500 ohm resistor to turn the output from 4-20ma to 2-10vdc. It works well, but I hardly use it. One of these days I'll buy a nice one with a display.
     
  14. otto

    otto Bakery Chef

    Messages:
    19,776
    Location:
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    I ordered a DIY kit but it's missing some parts. IMG_20160906_202132699[1].jpg
     
  15. otto

    otto Bakery Chef

    Messages:
    19,776
    Location:
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    Also no instructions. :p
     
  16. Daryl_Dixon

    Daryl_Dixon New Member

    Messages:
    3,476
    How long until companies like Fluke and Fieldpiece come out with meters that test:
    0-10 VDC
    4-20 mA
    etc

    Seems like the need is there now...
     
    knave likes this.
  17. LemonWizard

    LemonWizard Blinky Lights Wizard

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    4- 20 not being standard is the one that really gets to me
     
  18. safebustr

    safebustr New Member

    Messages:
    9
    You might check an outfit called "Electronic Goldmine". They have a variable output card that should fit the bill for your needs. The item number is (G21272). You would need to add a rectifier and small filter capacitor to the input and it should work fine business for your needs.
     

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  19. heavyevans

    heavyevans FNG

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  20. otto

    otto Bakery Chef

    Messages:
    19,776
    Location:
    in a van down by the river
    I have 2 different boards on the way, either of those should do the trick Thanks.