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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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#101
I just have looked in the Silonex Data.pdf for the NSL-32SR2.

The anode lead is 0.25x0.51 mm, the cathode lead is 0.25x0.64 mm and the cell leads are 0.45-0.56 mm.

I´ve made the holes for the anode/cathode side 0.4 mm diameter and the cell holes 0.6 mm diameter.

That´s the problem point.... So if i see that right, you have only a problem on one side to insert the leads, correct?
 
#102
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Yes Oliver, just the one side (the shorter leads). I hope to test the board later today or tomorrow and will post again.

Rob.

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#104
Thank you for offering this board, it will make my build of the lightspeed attenuator easier and better. I just ordered the parts for this board, and I want to share the part numbers for US suppliers, since it took me a little while to get this together (especially the Wago terminals). I am not positive that the potentiometer that I selected is the best choice for the job (or the other parts), so feel free to criticize my parts selection.

I'm looking forward to getting my lightspeed up and running with my Pass B1. Thanks again for offering the board and saving me having to build it up on perf board.

-Aaron.

Wago terminals - Newark - 79K2058
Wago tool - Newark - 28K9565

The rest is from Mouser:

Mouser # 688-RK27112A00CC
Mfr. #: RK27112A00CC
Desc.: Potentiometers Slotted 25mm 100k



Mouser #: 71-CMF55100R00BHEK
Mfr. #: CMF55100R00BHEK
Desc.: Metal Film Resistors 1/4watt 100ohms .1%


Mouser #: 75-T93XA1K10%D06
Mfr. #: T93XA 1K 10%D06
Desc.: Trimmer Resistors - Multi Turn T93XA102KT20


Mouser #: 667-ECA-1JHG100
Mfr. #: ECA-1JHG100
Desc.: Aluminum Electrolytic Capacitors - Leaded 10uF 63V


Mouser #: 512-LM7805CT
Mfr. #: LM7805CT


Mouser #: 505-MKP20.1/250/5P5
Mfr. #: MKP2-0.1/250/5X2
Desc.: Polypropylene Capacitors 250V .1uF 5% L/S 5mm CASE: 7.2 X 13 X 7.2
 
#106
Puffin said:
They may be too small or they may be just a very tight fit. The problem is that the short wires (Cathode and Anode) are very thin and you cannot apply enough pressure to get them in without risk of bending or breaking. I would suggest that in future boards you make the holes the same size as the other 2 legs.
Click to expand...

We've been told that LDR's are thermally sensitive especially while soldering.
Using terminal blocks rather than soldering LDRs seems to be a good way to go.
Could you place an alternative on the board for this use ?
Cheers
 
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#107
Oliver. Got my board working, but not without a little head scratching. The board suggests that the terminal posts for IN & OUT L & R go in the set of holes nearest the edge of the board. I did this and got no sound at all. Looking at the board again see that there are 4 holes and there are more tracks to those holes. This was after about an hour of checking all connections and tracing the tracks on the board etc etc. Joining each set in parallel gave me sound!! A pointer for other builders
 
#108
Puffin said:
Oliver. Got my board working, but not without a little head scratching. The board suggests that the terminal posts for IN & OUT L & R go in the set of holes nearest the edge of the board. I did this and got no sound at all. Looking at the board again see that there are 4 holes and there are more tracks to those holes. This was after about an hour of checking all connections and tracing the tracks on the board etc etc. Joining each set in parallel gave me sound!! A pointer for other builders
Click to expand...

That´s right!
The Wago Terminals does this internally, but a good suggestion. :up:
 
#111
Oliver -

When I got my LDRs from Uriah (his 2nd GB, if I remember correctly - NOT the one currently in progress) he told us that we should use 500K pots. I assume we just substitute the 500K for the 100K in the BOM, right???

Uriah probably monitors this thread so he may care to comment too.

BTW - haven't received my boards yet (I'm in California and yesterday was a holiday) hopefully they'll get here this week - I'll probably get 2 more in Round 2 - my brother and son always want just what I have 🙂

Thanks,
 
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#112
sandbasser said:
Oliver -

When I got my LDRs from Uriah (his 2nd GB, if I remember correctly) he told us that we should use 500K pots. I assume we just substitute the 500K for the 100K in the BOM, right???

Uriah probably monitors this thread so he may care to comment too.

BTW - haven't received my boards yet (I'm in California and yesterday was a holiday) hopefully they'll get here this week - I'll probably get 2 more in Round 2 - my brother and son always want just what I have 🙂

Thanks,
Click to expand...

Does he say that? I don´t know... If so, than you´re right.

Best regards,
Oliver
 
#114
Hey - back-to-back posts... 🙂

I received my boards today. Quite nice. But, I too have the problem with the LDR wires being too thick to fit through the holes.

QUESTION: is it safe to use a micro drill bit and gently enlarge the holes (using a pin-vise not a power tool)???

Again, thanks and kudos to Oliver for putting this GB together.

Thanks,
 
#115
sandbasser said:
Hey - back-to-back posts... 🙂

I received my boards today. Quite nice. But, I too have the problem with the LDR wires being too thick to fit through the holes.

QUESTION: is it safe to use a micro drill bit and gently enlarge the holes (using a pin-vise not a power tool)???

Again, thanks and kudos to Oliver for putting this GB together.

Thanks,
Click to expand...

Hi Ray,

i don´t have any experiances with micro drill´s, but i prefer puffin´s solution. This looks safer.

On the "Round 2" boards, i will make the holes a little bigger (0,7mm)!


Best regards,
Oliver
 
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