Recent content by untilbroken

I am probably going to rev the design and use MOSFETs instead. I can remove D4 doing that and keep the same BOM cost. I am not sure, though, if I keep D4; I can put some preload on it, which would help with rise time. Maybe someone will come up with a better idea. That's with MOSFETs; my rise...

Page 2 of your PDF schematic shows "L2" with a value of "0 ohm 0805", which I assume is an oversight. Can you please clarify what that was supposed to be? L2 was an inductor, but in testing, my rise time was too fast, causing it to ring. It worked correctly within the confines of what is defined...

I've been working on something like this but on SMT32 instead of RP2040, and I used a discrete transmitter instead of the obsolete of the shelf ones. https://github.com/garnerm91/J1850VPW_USB_HW-SW if you are interested, let me know, and I can help you get one up and running.