Led chaser circuit diagram using 4017 and 555. The ic will activate each of its outputs in a sequence manner each time a positive pulse receive on its clock input pin 14. By modifying the circuit in a proper way you can even use this to control lights working on ac mains. Note that all these links are external and we cannot provide support on the circuits or offer any guarantees to their accuracy.
You can use this circuit for decorative purposes. Technically the ic contains a built in oscillator and 14 stages of ripple carry binary counter. 555 astable oscillators here are circuits that operate from 300khz to 30 minutes.
The heart of this circuit is ic no. Led related electronic circuit diagrams circuit schematics. 300khz is the absolute maximum as the 555 starts to malfunction with irregular bursts of pulses at this high frequency and 30 minutes is about the longest you can guarantee the cycle will repeat.
Including those by dave johnson. The heart of the circuit is a cd 4017 decade counter ic. Learn to build electronic circuits.
Led light emitting diode circuits schematics or diagrams. Copying content to your website is strictly prohibited. A simple led chaser hobby circuit can be made using 555 timer and cd4017 counter ic.
The ic has 10 outputs which are q0 to q10.