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Mini Speaker Voltage

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Mini Speaker Voltage

Home › Forums › R/C & Accessories › Mini Speaker Voltage

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  • 26 July 2015 at 15:11 #59402
    David Marks 2
    Participant
      @davidmarks2

      My son has caught the model boat bug (or in his case a radio controlled rubber duck). He has ordered a mini speaker off the internet (from Hong Kong) which he intends to cannibalise so he (or should I say the duck) can produce appropriate duck type noises. This device apparently can be powered externally and requires a 5V DC supply. To save space it is intended to run the motor (a 385) on two 4.8V receiver batteries wired in parallel. Question will 4.8V be OK to also power the speaker?

      26 July 2015 at 15:11 #5380
      David Marks 2
      Participant
        @davidmarks2
        26 July 2015 at 16:22 #59404
        Dave Milbourn
        Participant
          @davemilbourn48782

          David

          You'll probably find that the actual voltage range is very much wider than you think, and that 5v DC is specified mainly because it's the standard USB voltage and therefore most people have one. A speaker is after all just a moving magnetic coil and a nominal 4.8v supply will be fine.

          Dave M

          26 July 2015 at 16:36 #59405
          David Marks 2
          Participant
            @davidmarks2

            Dave

            Many thanks for your prompt response. Also intend trying an Action P78 speed controller as a change from the Mtronics units that I normally use.

            Regards – David Marks

            26 July 2015 at 18:23 #59406
            Dave Milbourn
            Participant
              @davemilbourn48782

              One for the home team, eh? If you fit the 1N4003 diode then you can run everything from the main battery packs – you don't need a separate battery for the receiver.
              DM

              26 July 2015 at 20:54 #59408
              David Marks 2
              Participant
                @davidmarks2

                Dave

                Yes I did have a quick look at the Data Sheet and found the modification re. fitting the diode. Will give that a try as obviously not requiring to fit a receiver battery frees up more space. The component appears to be freely available on Ebay. I think my soldering will stand up to the fitment.

                26 July 2015 at 23:04 #59411
                Dave Milbourn
                Participant
                  @davemilbourn48782

                  There should be one included. Let me know if there isn't – I have one or two in stock……………

                  27 July 2015 at 07:47 #59413
                  David Marks 2
                  Participant
                    @davidmarks2

                    Dave

                    Thanks very much for the offer but my son has already ordered some via the internet. Qty 10 for 99p with free postage.

                    27 July 2015 at 08:47 #59416
                    Dave Milbourn
                    Participant
                      @davemilbourn48782

                      10p each? A nice little earner, that. Check out the price for 100 here. I used to buy them 1000 at a time. **LINK**

                      Mind you, for the worst bargain of all check out Maplin's price for 0.6W resistors and then compare it with JPR's 0.25W!

                      DM

                      Edited By Dave Milbourn on 27/07/2015 08:48:56

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