Skeches Circuits Parts Arduino NANO SG90 x 2 CDS Photo Transistor Tact Switches x 2 7 segment - 4 digit 9V batt. Details SG90 Pins - D3(L), D5(R) (PWM) Tact Switch Pins - D4(L), D6(R) CDS Pin - A0 7 Segment Pins Segment = D11 (a), D12 (b), A1 (c), A2 (d), A3 (e), A4 (f), A5 (g), A6 (dp) Digits = D7 (d1), D8 (d2), D9 (d3), D10 (d4) Tact Switch와 CDS Transistor에는 NANO 내부의 Pullup Resistor 사용. (No Need 10k Resistor)
