what kind of series termination resistors should I be using for a 5Mhz digital (0 to 5V) signal which comes from a comparator on the other end of up to 45cm of ribbon cable and at least two connectors?

how does one even go about estimating this?

the comparator is a push-pull output, and is already source-terminated with 68 ohm resistor

so on the receiving end, on a different PCB, going into some TXB0108 level shifter ICs, what kind of series termination is normal/standard practice?

As a placeholder in my schematic i've put 68 ohm resistors on the receiving end and will go right at the inputs to the level shifter

youtube.com/playlist?list=PLXvLToQzgzddPKq_txEXNe0pxaSHqPtMO

Here is a good playlist from Robert Feranec on PCB design: "Every day Hardware Design TIPS"

@KyranF certainly the impedance of the generating circuit as well as the traces to the sink play a role in here. In the worst case you can solder in a pot and look what works best ;)

Hi! Does anyone here know about the legal ISM bands in south africa? Is 433mhz included?

Hi, I have been looking for a while now for some good (4 digit) 7 segment displays to order. The problem now is that i don't understand why every part (On eBay) that i can find has a different part number. Are there no commonly used displays of this kind or am i missing something?

You are missing that professional parts are not sourced from ebay

Does anyone here happen to know anything about PVD?

I'm trying to test out a little vapour dep. setup and I'm mainly getting pure carbon

Sweet! Printed a 0.1mm film of zinc on a test tube!