DIY Kits Two Bit Decimal Counter The 2 Bit Counter Parts DIY Electronic Kit

Circuit structure principle description
Use CD4518 to complete the two-digit decimal counting, one of the decimal counters is connected to: IEN end to do the counting enable end (active high), 1CP to count the clock input end (rising edge trigger is valid), to perform single digit count; second The decimal counter is connected to: 2CP end is made to count enable end (low level is valid), 2EN is used as count clock input end (falling edge trigger is valid, 1Q3 from decimal counter is used as carry pulse, asynchronous technology connection mode), carry out decimal The count of the number. The 8421BCD code output by the two-bit counter is directly input to the respective decoding chip CD4511.