Hi,
I'm building this circuit . If you scroll down to the 10 Channel LED sequencer, you will find the schematic I'm using. I've got this built exactly the way it's set up in the schematic, only I'm using 9volts of electricity instead of 6. It's going all haywire, lighting up one random LED then all of them, then another random LED, then all of them. What's wrong? Do I need a pulldown resistor somewhere?
I have a few other questions too. If I want to be able to change the speed of the LEDs, do I just replace the 47k resistor with a potentiometer?
AND if I want this to be only 8 channels, how do I eliminate the last two LEDs?
I saw this thread, and tried adding a few bypass capacitors, but I don't know how to do that? or where to put them? I added a few ceramic disk capacitors, one from pin4 on the 555 to ground, and one from pin 16 on the 4017 to ground. Nothing changed.
I'm building this circuit . If you scroll down to the 10 Channel LED sequencer, you will find the schematic I'm using. I've got this built exactly the way it's set up in the schematic, only I'm using 9volts of electricity instead of 6. It's going all haywire, lighting up one random LED then all of them, then another random LED, then all of them. What's wrong? Do I need a pulldown resistor somewhere?
I have a few other questions too. If I want to be able to change the speed of the LEDs, do I just replace the 47k resistor with a potentiometer?
AND if I want this to be only 8 channels, how do I eliminate the last two LEDs?
I saw this thread, and tried adding a few bypass capacitors, but I don't know how to do that? or where to put them? I added a few ceramic disk capacitors, one from pin4 on the 555 to ground, and one from pin 16 on the 4017 to ground. Nothing changed.