Im creating a LED Cylon with a 555 timer and a 4017. The circuit im following uses 6 LED's and the "animation" looks something like the Cylon eye.
However, i wanted to use 10 LED's, instead of 6.
Is there any kind of IC similar to the 4017 but with more than 10 outputs?
Or (i have no idea if this works) using another 4017, I could connect one of the output pins of the first 4017 to the clock of the other 4017 and get aditional output pins, being able to get the cylon effect, instead of a simple sequencer.
One 4017 would be enough to drive 10 LED in a sequencial way, but the cylon effect actually comes back and forward.
Also, since i had already soldered 10 LED's i did the simple sequencer using the 555+4017 (its not the cylon effect).
Everything works fine but i added 220uF 25v capacitors so the LED's would fade-out but there no fading effect.
I used a multimeter on hte capacitor and it is getting charged and discharges peaking from 1.0V / 0.8mv and discharging right after.
(wich I had an Osciloscope right now)
This is just a small part of the circuit showing how i connected the Cap.
The circuit inside the chip, on pin 8 in this case, connects the pin to the 5V supply when it's HIGH and to Ground when it's LOW. So, the connection to Ground will instantly (at least very quickly) discharge the capacitor. You could try putting a diode (ordinary diode, not LED) in series with pin 8 and then connect the capacitor and LED to the other end of it. That way, the capacitor would not be able to discharge back through the 4017 but would stay charged and light the LED.
The LED Chaser is working fine. (just need to adjust the circuit so the Capacitors create the fading effect.
My problem is making a Cylon Effect ( Larson Scanner Kit - YouTube ) using a 555 + 4017 using more than 6 LED's.
The 6 LED Circuit is quite simple and easy to build. But I can't seem to find a way to add more LED's.
I'll search for Daisy Chaining some 4017 together.
The 4017 chip has 10 output pins (data sheet below). The pins are operated one at a time, so I'm not sure if this chip is suitable for what you are trying to make per the video you provided.
yeah the 4017 is probably the easiest way to do that effect but only with 6 LED's.
I wonder if there is any chip similar to the 4017 but with more output pins. same operations.
This project sound incredibly easy with an arduino and a shift register or two (using PWM shift register library) but I don't have all that much experience with the kind of circuit your making. Just a thought.
