How to modify the design of a 7-segment display multiplexing system in figure 6.49 (digital electronics Floyd) to accommodate two additional digits - Quora
![Electronic Circuit Collection: (IC LM555 + 4-digit counter IC MM74C926 + multiplexed 7-segment LED display) using to make a digital Stop Watch Electronic Circuit Collection: (IC LM555 + 4-digit counter IC MM74C926 + multiplexed 7-segment LED display) using to make a digital Stop Watch](https://1.bp.blogspot.com/-kyeQGvDD-S4/TivSFkZd_pI/AAAAAAAAAR4/LOzNZoFxH_4/s1600/digital-timer-circuit.jpg)
Electronic Circuit Collection: (IC LM555 + 4-digit counter IC MM74C926 + multiplexed 7-segment LED display) using to make a digital Stop Watch
![White 7-segment clock display - 0.56 digit height : ID 1001 : $4.95 : Adafruit Industries, Unique & fun DIY electronics and kits White 7-segment clock display - 0.56 digit height : ID 1001 : $4.95 : Adafruit Industries, Unique & fun DIY electronics and kits](https://cdn-shop.adafruit.com/970x728/1001-00.jpg)
White 7-segment clock display - 0.56 digit height : ID 1001 : $4.95 : Adafruit Industries, Unique & fun DIY electronics and kits
![Arduino Compatible 4 Digit 7 Segment Display Counter (0000-9999) | Circuit Ideas I Electronic DIY Projects I Robotics Arduino Compatible 4 Digit 7 Segment Display Counter (0000-9999) | Circuit Ideas I Electronic DIY Projects I Robotics](https://www.twovolt.com/wp-content/uploads/2020/05/Arduino-Compatible-4-Digit-7-Segment-Display-Counter-1-1024x488.jpg)