OK this is my second time trying to post this hit the wrong button and lost everything. I'm building (trying) a score bd for my brother's shuffleboard table, it will consist of 4 sets of 2 digits 5" displays (non multiplexed). 1 set 2 digit per side per team A and B with the opposite side displaying the same scores on it's 1 set 2 digit displays. With that said I'm having problems even powering up one of these displays (common anode). I have my circuit breadbd using a small 7 segment to test the rest of the circuit. After many issues with debouncing I've got it working for the most part. What I have is 2 different designs but neither seem to drive these large displays. 1st design: Counter HD74LS192p syn up/down counter SN7447an BCD to 7 Segment decoder driver MC14093B Quad 2-input NAND Schmitt Trigger (debounce) I know the 7447 can sink up to around 40mA but only can turn on the DP and Comma. 2nd design: Counter MC14029 up/down counter MC14511B BCD-7 seg latch/decoder/driver MC14093B Quad 2-input NAND Schmitt Trigger (debounce) On this circuit I was thinking I needed use switching transistors for the output of the decoder as it's active high outputs aren't what's needed for the common Anode displays. If this is what would be needed how would I hook them up limiting resistor values and so on. The 5" 7 segments specs are: @ 20mA Electro0 Optical data: Forward voltage typical 9.25v max 11v Max Ratings: Pulse current (lfp)150mA, DC forward current (lf) 25mA Again I'm not stuck on using either of these circuits or something new just trying to use the expensive x8 5" displays I've already purchased. Any help for this rookie would be appreciated.