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I would like to use a single color LED instead of the bi-color but it keeps blowing out. Do I need to change the CLR from 22k or am I using the wrong type of LED?
Thanks,
Craig
With a 9V supply, a standard LED should work fine with a CLR from1K8 to 4K or so.
The CLR is R19? It says that it should be 22k. is this wrong, or is that only for the bi-color?
Where are you grabbing a build document that says CLR is R19? I have double checked both new and old SWAH version build documents twice and they both say R31 is CLR. I am happy to correct a typo but I cannot find it.
From the current Build Document:
https://guitarpcb.com/wp-content/uploads/2021/09/SWAH-v5-2021.pdf
UPDATE: It must be an older downloaded doc with a typo that was stored for use.
Always check for a new doc before building in case of an update. Appears as if this was updated back in Feb 24. It does not happen often but is always best in case of a typo or potential mod update. Also double check the schematic when ever there is doubt or questions. Even if schematics are not your forte many items like LED are easy to find (see image above) and you will note that the resistor preceding D6 is R31 the CLR.
My best guess then is that R31 is not populated (causing the LED to blow) or you are using a wiring board in which case the CLR needs to be populated there as explained in the image above.
Of course always ask here just like you did when in doubt. Again we go through many checks to prevent problems but it is always possible that some small item might leak through the cracks.
I printed the doc awhile ago, I’ve pretty busy and didn’t start the project till recently. You can see it says R19. You’re right that I should’ve checked to see if the doc was updated. I guess I just didn’t think of it and I didn’t look at the schematic because I’m just a guitar player. With every build I learn a bit more.
I didn’t use the wiring board, I thought I put a 1k8 in R31 but I need to check. I have confidence I’ll get it worked out. I’ve built a few other pedals and they all sound great. I appreciate the help–thanks!
I used to say I am just a guitar player too. That will change.
If everything was built exactly by the BOM though it will work (schematic and BOM has been the same).
Otherwise post some photos.
I am sure you will figure it out.
I did post a pic, was it not there? Either way I’ll get it working.
Thanks for the vote of confidence!
Hi Barry, so I got the LED to work, now how do I get it to go off?? It just stays on if it’s engaged or not.
The pedal sounds great but I’m getting very frustrated with this dumb problem.
I found another different value from my doc and the current. Mine says R27 is 7k9, the current says 7k5. I have a pic. Don’t know if it makes a difference but I really can’t figure out why the LED won’t shut off. The date on my schematic is 8/10/21.
Check the LED ground connections sounds like your LED isn’t breaking it’s ground connection when switched
7K5 won’t make any difference I’d assume it’s just an easier value to find compared to 7K9
Got it! Bad switch. Thanks for the patience!
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