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Inexpensive 3.5 digit voltmeter HELP — Parallax Forums

Inexpensive 3.5 digit voltmeter HELP

ArchiverArchiver Posts: 46,084
edited 2001-12-05 03:19 in General Discussion
I am looking to either make or buy a 3.5 digit voltmeter. I need to
read the voltage of a wire that varies from 0v to 1v. I have seen
many units for over 150$. I know they must be cheaper than that
somewhere. Also, does anyone know where I can get just the LCD
display for such a project? What IC chips would I need to drive such
a monster?

Thanks
rick

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2001-12-04 22:12
    Radio Shack has some less expensive ones that I believe are 3.5 digits. You
    can also try surplus places (e.g., Herbach & Rademan). $150 seems very
    expensive for a DVM that only needs to read voltage (many do other
    measurements as well)
    Original Message
    From: rblundel@t... [noparse]/noparse]SMTP:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=iDim6ac8o1s9K6sTrDc_GYzUkvbZPluw_bONUjgWiwCJO1H_VgTrIumzYlbE8O05GVuqz2Dft3ArI-NDTJSJ0X3H]rblundel@t...[/url
    Sent: Tuesday, December 04, 2001 3:03 PM
    To: basicstamps@yahoogroups.com
    Subject: [noparse][[/noparse]basicstamps] Inexpensive 3.5 digit voltmeter HELP

    I am looking to either make or buy a 3.5 digit voltmeter. I need to
    read the voltage of a wire that varies from 0v to 1v. I have seen
    many units for over 150$. I know they must be cheaper than that
    somewhere. Also, does anyone know where I can get just the LCD
    display for such a project? What IC chips would I need to drive
    such
    a monster?

    Thanks
    rick


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  • ArchiverArchiver Posts: 46,084
    edited 2001-12-05 03:19
    Harbor Freight has several digital multimeters for under $10.00. Often they
    put them on sale for around $5.00. HF is primarily a West Coast Company,
    but you can reach them at: www.harborfreight.com and order on line. Of
    course you will have to pay shipping , but they are quite fair on their
    shipping charges. The meters I refer to are manufactured in China, but I
    have found them entirely satisfactory for everything except for extreme
    accuracy situations. They perform favorably with the under $100.00 units
    from the major manufacturers.
    Hope this helps.
    Henry
    Original Message
    From: <rblundel@t...>
    To: <basicstamps@yahoogroups.com>
    Sent: 04 December, 2001 12:02 PM
    Subject: [noparse][[/noparse]basicstamps] Inexpensive 3.5 digit voltmeter HELP


    > I am looking to either make or buy a 3.5 digit voltmeter. I need to
    > read the voltage of a wire that varies from 0v to 1v. I have seen
    > many units for over 150$. I know they must be cheaper than that
    > somewhere. Also, does anyone know where I can get just the LCD
    > display for such a project? What IC chips would I need to drive such
    > a monster?
    >
    > Thanks
    > rick
    >
    >
    > To UNSUBSCRIBE, just send mail to:
    > basicstamps-unsubscribe@yahoogroups.com
    > from the same email address that you subscribed. Text in the Subject and
    Body of the message will be ignored.
    >
    >
    > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
    >
    >
    >
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