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  • LED Battery Status (assembled)

    Hi all,

    looking to make a battery status toy that will show you how you car battery is doing.

    Initial ideas are a 5 LED display (or a numeric read out - more expensive), that would come on for a set amount of time after a push button was pressed.

    This is still in design stages and just thought they might be useful to you lot??

    Initial estimations are cheap,and the range i can provide is varied to suit your individual needs ie - backlit switches, colours, sizes, always on, 5 LED, 3 LED, Numeric etc

    Any interest out there??

    Nick

  • #2
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    • #3
      Great idea, but don't Maplins sell those things cheap anyway...?
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      • #4
        Originally posted by Spaghetti
        Great idea, but don't Maplins sell those things cheap anyway...?
        Not any more..

        I'm looking for a numeric LED one, RS have them but they are

        Quite happy to build it myself but need someone else to design it!

        Steve
        ....Yes, I know it has a stupid name, those crazy Japanese!

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        • #5
          no checked maplin 1st - basically im looking at something you can stick to your dash, or fix somewhere, and have either a on - site (in the box) push switch, or a off site (wait for it.... Out the box) that can be mounted elsewhere.

          Red -> Red -> Yellow -> Green -> Green LED's

          Numeric ones areexpenise - i would estimate 30 complete
          LED - 10 - 15

          Who's in?

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          • #6
            RS? Radio Shat...?
            Hey i know the chainstore formerly known as Tandys used to sell all sorts of electronics books that used to have all these weird and wonderful circuits to build - I'm sure there's a circuit diagram out there somewhere to buy or just download
            In da club....

            ALIZEE WANTS YOU.....

            (\__/)
            (='.'=)
            (")_(")
            Bunny's first poo
            __ U

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            • #7
              yes - but i will send unit to your door!
              Not told you off for threadhi-jacking as you are a fellow Northerner - therefore: Sound.!

              Nick

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              • #8
                lol @ Radio Shat!!!!(can hi-jack my own thread cant i???)

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                • #9
                  LM3914 is the chip that controls 10 LED bar graph display.
                  肚子笑痛了
                  S60 Install

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                  • #10



                    That would be the circuit.
                    肚子笑痛了
                    S60 Install

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                    • #11
                      Ok, interested....
                      Sorted, mad fer it - wikkid!
                      In da club....

                      ALIZEE WANTS YOU.....

                      (\__/)
                      (='.'=)
                      (")_(")
                      Bunny's first poo
                      __ U

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                      • #12
                        LOL.... Carefull Spag, didnttell you where in the North im from!!

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                        • #13
                          Originally posted by OriginalNick2
                          Hi all,

                          looking to make a battery status toy that will show you how you car battery is doing.

                          Nick
                          Try using a tricolour led and zeners to change it from red through orange to green depending on the voltage, got a circuit diagram from an old mag works ok very small. Its an old article from EE. the pics are a bit poor if you want better i will have to rescan them. Let me know
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                          • #14
                            But I think it would be much cooler to use like 20 or 40 LED's and put them in a circle like a real gauge.
                            肚子笑痛了
                            S60 Install

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                            • #15
                              @ old Lou : 1 LED? would that not be a bit pants in the day? Hmmm. Special Order job that one - if you want one i will make it. But let me sqaure the others away first.

                              @JCDILLIN: Can be bought already, and are pricey.Where would you put it? there are these: http://cgi.ebay.com/ebaymotors/ws/eB...spagename=WD2V

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