I know that it’s good practice to put a 100 ohm resistor before the first pixel’s data and clock line. However I’m using individual dotstar’s/pixels and not pixels already integrrated into a strip.
The setup is intended to be a single pixel on a pcb which then has each data and clock travelling across a twisted pair cable each paired with ground for about 6 inches then connected to another single pixel on a pcb. Since there is a change on which the signals are travelling on (pcb trace vs cable) there will be an impedance mismatch.
The pixels will be spaced about 6 inches from one another. Currently designing a pcb on which the pixels will be mounted on and since the pixel’s are being spaced apart and not as close together as they normally would be in a strip, the data and clock line between them would effectively become transmission lines.
So, would that necessitate me putting a series termination resistor on the output of each pixel’s data and clock lines if they are being spaced in this fashion?
The setup is intended to be a single pixel on a pcb which then has each data and clock travelling across a twisted pair cable each paired with ground for about 6 inches then connected to another single pixel on a pcb. Since there is a change on which the signals are travelling on (pcb trace vs cable) there will be an impedance mismatch.
The pixels will be spaced about 6 inches from one another. Currently designing a pcb on which the pixels will be mounted on and since the pixel’s are being spaced apart and not as close together as they normally would be in a strip, the data and clock line between them would effectively become transmission lines.
So, would that necessitate me putting a series termination resistor on the output of each pixel’s data and clock lines if they are being spaced in this fashion?