Hello,
I've got what I'm guessing is a pretty simple question for most of you. I want to blink three LEDs that are in series, with a LOOONG duration on and off, about five minutes at a 50%-ish duty cycle. I found a calculator online that let me determine component values based on the time I wanted, and I found a calculator that let me figure the best resistor value for LEDs in series. One diagram I found shows a 10μf capacitor between pin 5 and ground, but another shows a a circuit that's identical except that pin 5 isn't connected to anything. For now I'm going with the circuit that DOES have the capacitor, but it can obviously be taken out of the circuit easily if it's not needed or if it actually would cause problems.
So, would anyone be willing to give my circuit diagram a quick review? I mapped this out based on the actual pin locations of a 555, rather than the more common diagram showing the pins in the most expedient locations (4,7,6,2,1,5,3,8).
I'm starting to figure out some of this stuff on my own, so I'm looking for a second, much more experienced set of eyes to make sure I'm not messing this up. Thanks all!
Dave
I've got what I'm guessing is a pretty simple question for most of you. I want to blink three LEDs that are in series, with a LOOONG duration on and off, about five minutes at a 50%-ish duty cycle. I found a calculator online that let me determine component values based on the time I wanted, and I found a calculator that let me figure the best resistor value for LEDs in series. One diagram I found shows a 10μf capacitor between pin 5 and ground, but another shows a a circuit that's identical except that pin 5 isn't connected to anything. For now I'm going with the circuit that DOES have the capacitor, but it can obviously be taken out of the circuit easily if it's not needed or if it actually would cause problems.
So, would anyone be willing to give my circuit diagram a quick review? I mapped this out based on the actual pin locations of a 555, rather than the more common diagram showing the pins in the most expedient locations (4,7,6,2,1,5,3,8).
I'm starting to figure out some of this stuff on my own, so I'm looking for a second, much more experienced set of eyes to make sure I'm not messing this up. Thanks all!
Dave