What does this mean on a schematic?

Started by swinginguitar, November 14, 2011, 12:12:02 PM

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swinginguitar

notice on the potentiometers, theres an arrow pointing up from lug 1 towards lug 2 .....does that mean they're tied together?

otherwise what would lug 1 of the bass pot connect to?



StereoKills

Lug one should only be connected to Ground (PE). Lug 2 is your output.

Not sure about that dark arrow. Haven't encountered that one before.
"Sometimes it takes a thousand notes to make one sound"

slacker

The arrow is showing which lug is the anti/counter clockwise one so you can tell which way round to wire the pots up.
On the bass cut you could wire lugs 1 and 2 together or leave lug 1 unconnected, it will work the same either way.

boogietone

I believe that it indicates the clockwise direction of the pot, i.e. when you turn the pot clockwise, the wiper should move in this direction. The arrow tail indicates lug 1.
An oxymoron - clean transistor boost.

R.G.

Yes. The arrows indicate clockwise rotation.

IMHO this is far more useful and universal than translating a pin numbering scheme. But that's just me.
R.G.

In response to the questions in the forum - PCB Layout for Musical Effects is available from The Book Patch. Search "PCB Layout" and it ought to appear.

edvard

Quote from: R.G. on November 14, 2011, 12:23:28 PM
Yes. The arrows indicate clockwise rotation.

IMHO this is far more useful and universal than translating a pin numbering scheme. But that's just me.

+1
No, it's not just you.
I've altered my Eagle libraries to incorporate the clockwise arrow.
All children left unattended will be given a mocha and a puppy

PRR

> arrow pointing up from lug 1 towards lug 2

"UP" or "More".

As most of us agree, "clockwise" on most conventional controls; however when you get into some odder control schemes (Quad had recessed upsidedown knobs; pocket radios had edge-wheels; BBC console faders) you have to stand at the operator position and pantomime "UP" then look behind and see where the wiper is headed.

There's also our wonderfully ambiguous language. To me, the treble cut is mis-arrowed. However if "Treble CUT" is the word on the knob, then "UP" is "less treble" and the arrow is correct (would drive me mad though).
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