Search results

After some more fiddling around, I finally settled on a 2.2uF capacitor followed by a 470 ohm resistor. (I removed the 1k resistor completely.) Testing with a 75 ohm load gives us a comfortable 0.55 V peak to peak (loaded), and drops the current close to 2mA (measured across a 10 ohm shunt...

The square wave shown there is set at 1.65v with a 1.65v offset, so it alternates between 0v and 3.3v. The max values shown on the scopes appear to be from zero. (So it alternates from 288mv to -288mv, and 4.1mA to -4.1mA.) Here is the text you can import if you would like to try for yourself...

I've been playing with some numbers in Falstad, and it appears to me that a 330 ohm resistor might actually be okay at the frequencies we're running at? (Graphing voltage at the divider, current at the square wave.) Is this simulation reasonably accurate for these purposes, or do I have a gross...

I just bodged together the resistor and capacitor as you suggested, and I successfully heard the audio in the WAV file on my cheap S/PDIF to analog converter. When I do the work to figure out a proper circuit, should I assume a 75 ohm load on the receiver? I am much more used to working in the...

Alright, I think I see where I messed up. I calculated those resistor values with no load. I don't think there is a way to change those values while still staying under the 4mA current limit of the output pins, so a transistor might be the way to go then. Switching to optical isn't useful for...

No luck with that. (I did actually bump into your thread where you discussed the copy flag, and I had already stuck that line into the output_spdif3.cpp file in following with your patch.) I also know it's not pretty, but here is a photo of the current setup, just in case something jumps out...

Hi, I recently grabbed a Teensy 4.1 in hopes of using it as a S/PDIF tone generator. Unfortunately I am not having any luck, so hopefully somebody can help me figure out what's going wrong. My initial goal is to play a WAV file on loop with a GLITS test tone. I created the test tone in...