Impulse 2

[Qiaozhi]

C5 position looking strange for me.

I've looked at the layout again, and it does seem to be correct.
Perhaps someone else with an Impulse PI can double-check.

[kt315]

[Wahyu]

C5 position looking strange for me.

Audio signal short to ground, yes strange for me too

[kt315]

C5 position looking strange for me.

[Qiaozhi]

Just asking a question but how did the input pins on both opamps end up with the same numbers ?

Updated schematic attached (V1.2).

[dbanner]

They needed to be relabeled. U1b 5,6,7

[6666]

Thanks for spotting that. Any other issues, please let me know.
Version 1.1 attached.

Just asking a question but how did the input pins on both opamps end up with the same numbers ?

[dbanner]

The impulse 2 is good little device. I can't understand what he is on about in the video. Has anyone tried a flat spiral coil with the device?

[qute1]

ta :-) i hope someday to make this impulse 2 useful because mine are spielzeuge!

[kt315]

he says he has to build a coil because a coil maybe specific and to tune damping resistor - pi does not want to see a gold earring ))

[qute1]

Kt could you perhaps translate the pertinant parts of this video as seems very interesting but need deatils of what to change and how ps you da man!

[kt315]

https://www.youtube.com/watch?v=xi9MBlCxjW0

[6666]

From studying other circuits C1 is probably something around 470PF
R5 seems a bit high. but that may be just his circuit ?

[waltr]

Thanks for spotting that. Any other issues, please let me know.
Version 1.1 attached.

Great, thanks.

Would like to see the PIC source code...but this might not be possible.

[qute1]

read my mind dbanner!