OK, so here's what I want to do: http://www.evilmadscientist.com/article.php/CylonOLantern
The thing is, I want to make it very, very small. I have a 5mm window to shine LEDs out of. I have maybe 30 cc (2 cu. in.) to fit all of the components in. I might be able to put batteries outside this, but I'd prefer not to. I figure a 3v coin cell should drive it just fine. It doesn't need to last very long. I talked to the guy who made the original, and he suggested a microcontroller to save space.
The problem is, I know nearly nothing. The only electronics stuff I remember is from Physics 112, about 6 years ago.
I would post a diagram to show you guys what I'm thinking so far, but all the programs to make such things seem geared toward high-end CAD stuff and are very difficult to use. (At least for me) I've got some 0603 LEDs that should fit 5-wide into my window. I've got a PIC kit at a 12f675 to do the blinking. I don't have the foggiest how to code the damn thing, but I figure that's step 2.
Step 1 is figuring out what the bare minimum number of components are and it what order I need to put them together. I figure I'll need a battery, my chip, 5 LEDs, and 5 resistors at the bare minimum.
I'm a bit confused about how to calculate the resistance I'll need, because I don't know what effect the chip will have on the circuit. Also, I'm wondering about capacitance and fading the LEDs. In the original project, he added another resistor, a transistor, and a capacitor in what he called a 'low pass driver circuit.' Given my space limitations, that's right out. Is there any way I can get an equivalent effect with fewer components, or failing that, fake it in software with the microcontroller?
Thank you for bearing with me on what would probably be a blindingly basic project for most of you.
The thing is, I want to make it very, very small. I have a 5mm window to shine LEDs out of. I have maybe 30 cc (2 cu. in.) to fit all of the components in. I might be able to put batteries outside this, but I'd prefer not to. I figure a 3v coin cell should drive it just fine. It doesn't need to last very long. I talked to the guy who made the original, and he suggested a microcontroller to save space.
The problem is, I know nearly nothing. The only electronics stuff I remember is from Physics 112, about 6 years ago.
I would post a diagram to show you guys what I'm thinking so far, but all the programs to make such things seem geared toward high-end CAD stuff and are very difficult to use. (At least for me) I've got some 0603 LEDs that should fit 5-wide into my window. I've got a PIC kit at a 12f675 to do the blinking. I don't have the foggiest how to code the damn thing, but I figure that's step 2.
Step 1 is figuring out what the bare minimum number of components are and it what order I need to put them together. I figure I'll need a battery, my chip, 5 LEDs, and 5 resistors at the bare minimum.
I'm a bit confused about how to calculate the resistance I'll need, because I don't know what effect the chip will have on the circuit. Also, I'm wondering about capacitance and fading the LEDs. In the original project, he added another resistor, a transistor, and a capacitor in what he called a 'low pass driver circuit.' Given my space limitations, that's right out. Is there any way I can get an equivalent effect with fewer components, or failing that, fake it in software with the microcontroller?
Thank you for bearing with me on what would probably be a blindingly basic project for most of you.