A Fancy and Creative Graduation Gown!

If you’re currently attending a college or university, and the graduation ceremony will be held in several weeks or months from now, then have you done all the preparation for it yet? Well, if you think that the graduation gown is a little bit dull and old-fashioned (Hopefully, it’s not the type of granny style ballroom party’s gown that being wore by Ron in the Harry Potter’s series lol), then it’s time to have some little bit modification on your graduation gown to make you stand out in the graduation ceremony… Ok, it might sound a little bit over to modify your graduation gown, but this is the only way to leave an unforgettable memory during your graduation day! Well, for this project, you’ll need to build the VU meter into the graduation gown. You’ll have to put 10 super bright blue LEDs lined up the front of the gown. These were a small electrets microphone that can be clipped at the top of the gown facing your mouth. So, when you’re speaking, the LEDs will light up from the bottom to the top and it depends on the volume of your voice! Remember to have a great moment with…

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Bi-color LED indication

Bi-color LEDs are same LEDs as uni-color just there are more than one LED housed in one package. Bi-color LEDs may have two or three leads depending on intentional connection method. Three lead LEDs have common cathode lead to which both LEDs are connected internally.   In order to tun one of the LEDs or both at the same time connect cathode to ground via current limiting resistor which value is equal to one LED required limiting. Of course you can connect current limiting resistors to each of anodes and control current individually. Then you can apply power to one of anodes or both at same time to have bi-color amber illumination. Two leads bi-color LEDs have two LEDs connected in parallel but in opposite sides. One LEDs anode is connected o another LEDS cathode and other lead same way. So by applying power you will be able to light only one LED. For instance if you connect to microcontroller you will need to use two microcontroller pins to control both LEDs.   So you cant turn on both LEDs at once without specific technique like dynamic switching both LEDs in high speed that would make effect of both LEDs…

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