A decade counter converts the pulses into 8 pulses (a wiring change makes it reset on the 9th count). The rest of the circuit is nothing more than LEDs, resistors, and diodes. Continue reading ...

This Toggle Switch uses the popular Johnson Decade counter IC CD4017. By giving positive pulses to its ... In the circuit IC CD 4017 is used in the ... When the clock input pin 14 receives a positive ...

They’re addressed by a set of CD4017 decade counters which are clocked by the 555 timer circuit. ... cd4017, decade counter, hat, led, protoboard. One Wire Reads The Keypad From The APRS Radio Mic.

This circuit can detect AC in the power cord from a distance of one foot or more. The AC frequency is available around the power cord which appears as AC hum. The circuit senses the AC hum and ...

The example above uses a 4026B decade counter close decade counter an integrated circuit that counts from 0 to 9 (ten states) before resetting back to 0 that can count from 0-9 and then make the ...