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Hi! I am designing a LED project and cannot come with a circuit for it. Maybe the experts here can help me out. I want to drive between 10-20 smd LEDs (1206 package, no high power nor high brightness) using as few components as possible. I want to use a low pint count microcontroller to make different patterns with the leds, and use CR2032 coin cell batteries. I really need to make this as small as possible, for example to be able to embed it a piece of paper the size of a credit car. The thing is that I cannot figure out the way to connect that quantity of LEDs for the CR2032 to be able to power them,and all the ICs (which must not be very much, 2-3 ICs). Maybe someone could point out any suggestiong for a way to boost the power of the CR2032 battery (or two batteries max if necessary) and the best way to connect the LEDs (in matrix, in rows, multiplixed). Thanks for your help and suggestions.