42013-02-13www.fritzing.orgProto layout and schematic for 2x2 button pad with single color LEDs (used on Simon board). Panelize this device/fp to a 4x4 pad if needed. Any single-color 5mm LED should be compatible. Spark Fun Electronics SKU : COM-07835.BUTTONPAD-2X2SINGLEBUTTONPAD-2X2SINGLEbuttonpad-2x2single2x2sparkfun Button padC1 AC1 KC1 SIG1C1 SIG2C2 AC2 KC2 SIG1C2 SIG2C3 AC3 KC3 SIG1C3 SIG2C4 AC4 KC4 SIG1C4 SIG2