MCM Electronics

Sound Star Kit By Velleman SA (MK172) MCM Part #28-12826

3.5 stars 1 review
MSRP: $30.26
You Save: $12.97 (43 %)

Star-shaped VU-meter

  • 60-LEDs sound star
  • Responds to sound and music
  • Built-in microphone
  • Adjustable sensivity
  • Multiple units enhance the effect
  • Great for parties, events, trade-shows, and as an eye-catcher

Specifications Top

  • power required: 9 - 12VDC / 200mA
  • dimensions: 4.2 x 4.4 x 1.4"

Part Numbers
MCM Part #:28-12826
Velleman SA Part #:MK172
Package Specifications & Dimensions
Weight:0.003 lbs.
RoHS Comp:Yes
Warranty:90 days
Need to Return?
Length:5.5 in.
Width:6 in.
Height:1.25 in.
Shipping Information
Extra Shipping Charge:No
Drop Ship:No

Product Reviews Top

  • by john.lacourse

    on 11/26/2014


    Overall: 3.5 out of 5

    An unusual kit. Its a VU meter with three levels (stars): green (low), yellow(mid), red (high).
    It is rated a difficult two but I would say it's more of a three. A lot of top soldering. As with most Velleman kits WATCH THAT HEAT. Since it is a single sided board, the pads lift very easily. If you make a mistake and have to remove and resolder, that will be very hard without lifting pads. The mounting pads for the LEDs are not large. Don't move the LEDs once soldered or you will break the artwork traces. Don't drop the board, that will surely break the traces if the LED hits.

    There are a lot of parts... Small parts. This will take about 5-6 hours to complete one. (I am making 7 as gifts for Christmas). I have built 4 so far and they all worked the first time. You have to be very careful with polarity of LEDs, Diodes, transistors. INSPECT, INSPECT, INSPECT, BEFORE YOU SOLDER. With so many LED's it is easy to inslall one backwards. I noticed that the cathode electrode of each LED forms a "dish" inside the LED that you can see in strong light. this will help you once you install them to make sure they are in correctly. The Microphone is very difficult to solder. It is soldered to two pins that have to be soldered to the board first.

    Operation: It is very sensitive. There is a control pot to adjust for the sensitivity. You can run on 9 volt battery or AC adapter (neither included). Like I said, it has three levels of VU meter, actually "nested" stars.
    Battery holder mounting is poor. Small bolts would be better than sheet metal screws that grab a little plastic and will pull out easily. Have some black model paint available to touch up anything not black on the front. Use a tiny bit of super glue on the switch body to the board to secure it better but don't get it IN the switch slider. During assembly soldering, "steer clear" of the battery holder mounting pads or you will not have room for the spacers. I actually trimmed my spacers with dikes on one side.

    It's not a bad kit but you will need some good eyes and/or magnification to build it.

    Merry Christmas!

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