Glad to be back! Sorry for my long absence. Hope everyone’s Holidays are going well!
I tried to reply to my post that was already started, but it had been 91 days old and not allowed to post there. So, I'll try this again, and the ideas were great there.
So, I want to build a name sign display to wrap up into a project box. Meanwhile, looking at the complexities with this project, I had found myself with very little knowledge to tackle this. Although, I have forced myself to learn more (because I love electronics) about components needed to conclude this project.
To make this short, I’m gonna use a safe (from what I have researched, correct me at will) amount of specs to complete this project. I have written them below to see if it even makes since (LOL) along with pics I have made with tracks. All help is and will be considered.
What I have come up with:
1. L.E.D. Blue Vf = 3.4
mA = 10
Now for the math:
Originally I needed 47 leds to flash, now only 45. So, below is what I know now. Source will be 12V (wall-wart or x--xx--xxx Cells). 555 timer to flash on/off for one second each still working on this. I chose the IRF510 as the driver portion still working on this too. Still under construction and pardon the mess.
I will need 22 chains of 2 leds with a resistor.
LED + LED = 6.8v (Source – 6.8 = 5.2v)
5.2v / .010mA = 520ohms ≠ 560ohms
5.2v X .010 = .052watts ≠¼ watt tolerance
And 1 LED with 1 resistor.
LED = 3.4v (Source - 3.4 = 8.6v)
8.6v / .010 = 860ohms ≠ 1K ohms (E12 values)
860 = .086watts≠ ¼ watt tolerance
Two Main Questions:
Am I on the right track? Don’t be afraid to let me know where I’m at.
Where should a resistor go in a series? Cathode or Anode and whether it’s with a mosfet or not.
Thank you.
I tried to reply to my post that was already started, but it had been 91 days old and not allowed to post there. So, I'll try this again, and the ideas were great there.
So, I want to build a name sign display to wrap up into a project box. Meanwhile, looking at the complexities with this project, I had found myself with very little knowledge to tackle this. Although, I have forced myself to learn more (because I love electronics) about components needed to conclude this project.
To make this short, I’m gonna use a safe (from what I have researched, correct me at will) amount of specs to complete this project. I have written them below to see if it even makes since (LOL) along with pics I have made with tracks. All help is and will be considered.
What I have come up with:
1. L.E.D. Blue Vf = 3.4
mA = 10
Now for the math:
Originally I needed 47 leds to flash, now only 45. So, below is what I know now. Source will be 12V (wall-wart or x--xx--xxx Cells). 555 timer to flash on/off for one second each still working on this. I chose the IRF510 as the driver portion still working on this too. Still under construction and pardon the mess.
I will need 22 chains of 2 leds with a resistor.
LED + LED = 6.8v (Source – 6.8 = 5.2v)
5.2v / .010mA = 520ohms ≠ 560ohms
5.2v X .010 = .052watts ≠¼ watt tolerance
And 1 LED with 1 resistor.
LED = 3.4v (Source - 3.4 = 8.6v)
8.6v / .010 = 860ohms ≠ 1K ohms (E12 values)
860 = .086watts≠ ¼ watt tolerance
Two Main Questions:
Am I on the right track? Don’t be afraid to let me know where I’m at.
Where should a resistor go in a series? Cathode or Anode and whether it’s with a mosfet or not.
Thank you.
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