Hello everyone, my name is Benjamin and i’m 13 y/o and I made a fart box following LMNC’s vero board layout and it doesn’t work correctly. I double-checked all the component locations and i didn’t find any errors(i think). I measured ±12 volts are on the board. It makes weird noises but no farts. The button stays lit and it permanently makes sound even when not pressed. I could also build a PCB if I had the full kicad schematics. The one I got off patreon did not have the pots wired nor did it seem to match exactly the fart box 1.0 vero board layout.
If anyone has any ideas of why it dosen’t work or has the full schematic so I can make my own pcb, please answer.
I’ll have a few pics and a video of my build.
Video link
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I just realized that the reason that the button dosen’t work is probably because the cv osc is being held high, so it always makes noise.
That’s an elegant build! Welcome to the forum!
You may want to check out this thread in the forum and maybe ask your questions there. I am sure the people who have built this successfully will be able to help. The first thing I notice off the picture though… is there a reason you built 2/3 of it on the reverse side of the veroboard?
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A lot of the wires to the pots are on the underside. The rest is on the top. It is also a double-sided board. glued to another one since I couldn’t find a big enough one.
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That makes sense then!
Could you post a link to the original schematic you are using? And could you include some more zoomed in photos of the front and back of yoyr board? It is difficult to zoom in, and only seeing one side.
Here are the photos:
Onedrive Link
Have you checked for unwanted connections between strips of the stripboard with a multimeter? Because you soldered components on the sides with the strips, I suspect a short between strips.
For instance: photo 1264 around the resistors close to the preset potentiometer on the top middle.
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This resistor?:
BTW, the stripboard is double-sided. There are no shorts on that resistor(I didn’t have the right value, so I put 2 resistors in series)
Maybe here ?
If in doubt I would pass a cutter blade or knife in the interlines then a little brush.
because sometimes it is invisible to the eye (we have already seen that here @Jos 
)
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Did you check for shorts between lines with a multimeter? A lot of times, shorts are not visible with the naked eye, so checking it with a multimeter is a necessity in my opinion.
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I found another short, but it didn’t change anything