However, rather than having 6 leads (cathode and anode for each LEDs ... This lead will be treated as the “common” pin of the RGB LED. As said, the circuit is built around CD 4029 IC and a few other ...

The following idea reuses one ofthese approaches to drive a maximumnumber of seven-segment LED displays ... you can choosebetween common-anode and common-cathodeconfigurations. Figure 1 This circuit ...