Vu meter connection

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • jasko_jacker
    Badcaps Legend
    • Oct 2014
    • 1137
    • italy
    #1

    Vu meter connection

    Hi
    For a television series, I have to build copies of some audio tape recorders, the production bought these vu meters which need to be connected to the headphone audio output of mp3 players. Can anyone show me how? connected directly, they do not work. Accuracy is not required just that the instrument needle moves
    Thanks
    Attached Files
    Tags: None
    • stj
      Great Sage 齊天大聖
      • Dec 2009
      • 30978
      • Albion
      #2
      Re: Vu meter connection

      what is the resistance of the coil?

        Comment

        • jasko_jacker
          Badcaps Legend
          • Oct 2014
          • 1137
          • italy
          #3
          Re: Vu meter connection

          800 ohm

            Comment

            • jasko_jacker
              Badcaps Legend
              • Oct 2014
              • 1137
              • italy
              #4
              Re: Vu meter connection

              I found this circuit , could it work ?
              Attached Files

                Comment

                • redwire
                  Badcaps Legend
                  • Dec 2010
                  • 3906
                  • Canada
                  #5
                  Re: Vu meter connection

                  Yes, that circuit looks good for driving the VU meter. Some VU meters have built-in diode rectifiers, some have built-in standard 3k6 resistor for calibration, some have nothing inside. From your pics it looks like just the raw meter (coil) movement.
                  You can use a 10k ohm trimpot and actually two resistors to mix left and right channels into mono is probably better.
                  The diodes could be Schottky, or ordinary silicon if it's just to move the meter as a TV show prop. The 1N34A is Germanium and harder to find.

                  A VU meter needs some power to move the needle, so a headphone output driving it all is best. So using Line Level can work but might cause loading problem and distortion to the audio.
                  Adding an LED backlight would be really cool and retro...

                    Comment

                    • jasko_jacker
                      Badcaps Legend
                      • Oct 2014
                      • 1137
                      • italy
                      #6
                      Re: Vu meter connection

                      This is the unit under costruction and the original
                      Thanks
                      Attached Files
                      Last edited by jasko_jacker; 06-28-2021, 01:12 PM.

                        Comment

                        Previous template Next

                        Related Topics

                        Collapse
                        • chth96
                          Is it possible to test small ceramic disc capacitor with analogue meter?
                          by chth96
                          I read EBOOK of Testing Electronic Component and found that

                          "In order to test the small blue resin coated ceramic disk capacitor which has 104 50v specification,it is possible to test this small ceramic capacitor by making use of analogue meter.
                          Set to times 10Kohm that has 12v output from the probe to check disorder of ceramic capacitor.
                          It is not uncommon that testing result of digital capacitance meter is okay,But It show shorted reading when you check it with analogue meter."

                          Is it really possible to test small ceramic disc capacitor with analogue...
                          03-09-2024, 10:03 PM
                        • Tynan Dill
                          Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?
                          by Tynan Dill
                          I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.

                          Upon bringing it home and plugging it up, it showed a standby light.

                          I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.

                          The screen seems to blackout and stay black, but with a flashlight I can see the display.

                          With my Playstation 4 connected via HDMI, and running a game I can hear sound.

                          Assuming...
                          ORIGINAL POWER SUPPLY BOARD
                          7 Photos
                          11-22-2024, 01:46 PM
                        • sam_sam_sam
                          Modification of a Fluke multi meter that uses three AA batteries to use a 14500 lithium ion battery
                          by sam_sam_sam
                          I have had with regular AA batteries that leak this meter is expensive new I already replaced the battery battery clips once and the same thing happened again and I am tried of so it is getting modified to accommodate lithium ion batteries that are the same size excluding the positive terminal and removing the battery clips I will have enough room for the BMS protection board

                          I going to put 3 lithium ion battery in parallel with the BMS protection board and a way to charge the battery externally and heat shrink the battery pack and use a JST connector so I easily remove the battery...
                          12-31-2023, 06:04 AM
                        • jorpec
                          Changing the scale of an analog meter
                          by jorpec
                          Hi

                          I want to change the scale of an analog meter, to monitor the charge of an li-ion single cell, so the needle at the end would point 4.2 volts and the 0 on the meter would point 2.5 volts or so, i tried to add diodes or a zener in series with the meter but the changes of the ambient temperature also changes the voltage value on the meter
                          I wonder how i can accomplish this so the meter would be precise at any temperature ?

                          Thnaks
                          01-23-2023, 10:37 AM
                        • sam_sam_sam
                          How an incandescent light and a ESR meter ** friend**have a machine blowing fuses
                          by sam_sam_sam
                          About a month ago we had a transformer jumper wire that burned in two different places between two transformers caused over $200 thousand dollars worth of damage to VFD drives at least 10 of them and a memory card and quite a few power supply as well

                          Now we have most of the equipment that got damaged back up and running except a feeder that has issues and we are waiting for some parts for

                          Now we also have another piece of equipment that was blowing fuses on the 110 volt controller switch circuit with the “E” stops and one switching power (24 volt) supply and a transformer...
                          12-14-2023, 07:45 PM
                        • Loading...
                        • No more items.
                        Working...