I've been working on my first set of Olsen 595 controllers for my first year of computer controlled Christmas lights and ran into a problem. I built 3 set of 8 channel boxes (all home made) because each 595 chip does 8 channels it was just easier and that way I can put the boxes in the yard near what they are controlling to minimize the number of extension cords....I have the 3 boxes daisy chained and box 1 and 2 are working fine there is about 20 feet of cat5 from the PC to the first box then about 5 feet from 1 to 2 and 2 to 3 so a total of 30 feet from PC to the last box. here's where thing get a bit confusing
boxes have 8 channels so;
box 1 is channels 1-8
box 2 is channels 9-16
box 3 is channels 17-24
like I said channels 1-16 OK! its 17-24
When I do a channel test in Vixen and turn on 17 channel 18 turns on 18 is 19 and so on...its like the channels have shifted by 1
IF I switch box 2 and 3 around still the same problem so I know the boxes work fine.
I did do some reading and found something about the voltage from the PC Parallel port, that if its lower then the supply voltage of 5v that the 595 chip might start doing some funny things and that I should lower the supply voltage to match the PC port voltage.
I also saw somewhere on the wiki about port booster using to NOT gates (logic inverter) back to back. would this boost the port voltage up to 5 OR would the output on the last NOT gate be the same as the input on the first NOT gate?
I tried to supply as much information about my setup as I could and tried to explain it without confusing anyone... Please Help!
boxes have 8 channels so;
box 1 is channels 1-8
box 2 is channels 9-16
box 3 is channels 17-24
like I said channels 1-16 OK! its 17-24
When I do a channel test in Vixen and turn on 17 channel 18 turns on 18 is 19 and so on...its like the channels have shifted by 1
IF I switch box 2 and 3 around still the same problem so I know the boxes work fine.
I did do some reading and found something about the voltage from the PC Parallel port, that if its lower then the supply voltage of 5v that the 595 chip might start doing some funny things and that I should lower the supply voltage to match the PC port voltage.
I also saw somewhere on the wiki about port booster using to NOT gates (logic inverter) back to back. would this boost the port voltage up to 5 OR would the output on the last NOT gate be the same as the input on the first NOT gate?
I tried to supply as much information about my setup as I could and tried to explain it without confusing anyone... Please Help!