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Optical Volume Control Professional PCB

Which soldermask colour do you prefer for future PCB´s?

  • red

    Votes: 66 13.3%

  • green

    Votes: 118 23.8%

  • yellow

    Votes: 54 10.9%

  • black

    Votes: 97 19.6%

  • white

    Votes: 52 10.5%

  • blue

    Votes: 108 21.8%
  • Total voters
    495
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#251
I got my Lightspeed up and working tonight, and it sounds fantastic.
One thing I noticed is that it has to be turned all the way up, to mute the sound and the other way around, go minimum volume to get maximum sound.

Is it possible that I put in the 100k potmeter in upside down?
The one I ordered from the BOM did not fit normal ON the board, so I mounted it from below. (there is a orientation pin on the pot from the BOM which makes that the only way to mount is from the underside of the pcb)

Anyone also had this problem?
 
#253
Yes that is correct. It has to be turned counter clockwise to rise in volume.

I tried desoldering the pot but it was impossible to desolder. I will leave it like it is.I read in the instructions that wrong orientation of the pot is a mis-wire-ing that gets this effect. I have no idea if it is harmfull.

The sound of the lightspeed is however very good though, the decays last forever, and all instruments gained a size upgrade. Its seems like there is no audible effect. 🙄
 
#257
Well, I thought it would not make a difference how I mounted the pot. Besides I thought, that the design of the pcb was that the pot should go underneath.

I found it a bit strange, but then again, I could always desolder it... 🙁

Ah well, it wasn`t the first mistake I made 😀
 
#258
Hi all, official announcement :cop:

Oliver has chosen a new name fore his next round of LDR attenuator boards
A few remaining boards may still be sold as "Lightspeed" boards

New name is "Optical Volume Control"

Thread title will be changed too

Good luck
 
#260
Hi Rikkert, you actually helped me along with your post. I also bought the components per BOM list and was puzzled by the incongruity between the orientation pin on the pot and the corresponding hole in the pcb. I already decided to simply pinch off the offending pin and mount the pot topside on the pcb, but haven't come round to build the optical volume control yet. When it's up and running I'll share the results.

What would diy be without mistakes🙂
 
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