jrz126
Active Member
I'm currently going to Penn State for EE (I'm going into my 3rd year, so I have a pretty good concept of stuff). I'm working on a project (not school related) involving 62 led's and my car. https://www.cardomain.com/memberpage/435572/2 here's some pics of my old version. I had some problems with my circuit and the LED's just arent bright enough, so I'm gonna re-do it.
This time I'm going with some 74hct299 shift registers to drive the uln2803's. I chose the shift registers because I'm hoping to get a microcontroller hooked up to it some day. (and I got 360 of them off ebay for $4.95). I'm also strongly concidering learning how to make my own printed circuit board. I'm still going to use the lm3915 to drive the clock for the S.R.'s and then I'll go with a 555 to drive the serial data in. It should give me the 'random' lighting I'm looking for.
Now being a college student, I'm working with limited funds here. I need some 2 pin female connectors to connect to each led. anyone know of a good source for these? I found some that will work from digikey for about $20.00 (it's for 100 connector housings and 200 crimp pins.
Also, does every LED need it's own current limiting resistor? I think they do, because I didnt have one for the old project and I had a prett high falure rate.
Let me know what you think.
EDIT: sorry, this is in the wrong section, I just found this board and I had to get my post up
This time I'm going with some 74hct299 shift registers to drive the uln2803's. I chose the shift registers because I'm hoping to get a microcontroller hooked up to it some day. (and I got 360 of them off ebay for $4.95). I'm also strongly concidering learning how to make my own printed circuit board. I'm still going to use the lm3915 to drive the clock for the S.R.'s and then I'll go with a 555 to drive the serial data in. It should give me the 'random' lighting I'm looking for.
Now being a college student, I'm working with limited funds here. I need some 2 pin female connectors to connect to each led. anyone know of a good source for these? I found some that will work from digikey for about $20.00 (it's for 100 connector housings and 200 crimp pins.
Also, does every LED need it's own current limiting resistor? I think they do, because I didnt have one for the old project and I had a prett high falure rate.
Let me know what you think.
EDIT: sorry, this is in the wrong section, I just found this board and I had to get my post up