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DIYstompboxes.com  |  DIY Stompboxes  |  Building your own stompbox  |  what does this schematic symbol mean? 0 Members and 1 Guest are viewing this topic. « previous next »
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Author Topic: what does this schematic symbol mean?  (Read 1811 times)
FWALS
Posts: 4


what does this schematic symbol mean?
« on: May 23, 2011, 03:38:39 PM »

I'd like to build this, but I'm not sure what the  arrow with 'Vb' above it means.
Any help would be appreciated. Here's a link to the schematic

http://www.experimentalistsanonymous.com/diy/Schematics/Fuzz%20and%20Fuzzy%20Noisemakers/Analog%20Bit%20Crusher.gif



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cloudscapes
Posts: 765


Etienne B


Re: what does this schematic symbol mean?
« Reply #1 on: May 23, 2011, 03:44:41 PM »

it's a voltage reference. in this case half of the power supply generated by the two resistors and capacitor on the left. just connect all 5 Vb points together and you're good to go.
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FWALS
Posts: 4


Re: what does this schematic symbol mean?
« Reply #2 on: May 23, 2011, 03:48:30 PM »

Great thanks!
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ayayay!
Posts: 2058


Jono


Re: what does this schematic symbol mean?
« Reply #3 on: May 24, 2011, 08:09:21 AM »

Wow!  I don't think I've seen a pedal with so few grounds...  icon_eek That alone begs it to be built.  Should be really easy!  What the heck is this anyway?  Something synth-y?
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tiges_ tendres
Posts: 1675

Steven M


Re: what does this schematic symbol mean?
« Reply #4 on: May 24, 2011, 11:03:28 AM »

Wow!  I don't think I've seen a pedal with so few grounds...  icon_eek That alone begs it to be built.  Should be really easy!  What the heck is this anyway?  Something synth-y?
It's a sample rate reducer.  Kind of sounds like a ring mod.  I built one but was largely unimpressed.
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Try a little tenderness.
ayayay!
Posts: 2058


Jono


Re: what does this schematic symbol mean?
« Reply #5 on: May 24, 2011, 12:25:15 PM »

I'm a derp.  I don't know what a sample rate reducer is unless it's one of those online mortgage calculators. 
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The people who work for a living are now outnumbered by those who vote for a living.
Gurner
Posts: 1314


Re: what does this schematic symbol mean?
« Reply #6 on: May 24, 2011, 01:19:39 PM »

Wow!  I don't think I've seen a pedal with so few grounds... 

They're there in spades... albeit virtual ones!
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tiges_ tendres
Posts: 1675

Steven M


Re: what does this schematic symbol mean?
« Reply #7 on: May 24, 2011, 01:23:38 PM »

I'm a derp.  I don't know what a sample rate reducer is unless it's one of those online mortgage calculators. 

Sounds like this:

<a href="http://www.youtube.com/watch?v=3nJVxZV2Ptw" target="_blank">http://www.youtube.com/watch?v=3nJVxZV2Ptw</a>
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Try a little tenderness.
ayayay!
Posts: 2058


Jono


Re: what does this schematic symbol mean?
« Reply #8 on: May 24, 2011, 01:34:06 PM »

Quote
They're there in spades... albeit virtual ones!

Oh yeah I know, I just mean the literal components to earth.  Don't see that too often in pedals. 
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The people who work for a living are now outnumbered by those who vote for a living.
EATyourGuitar
Posts: 491


ALL YOUR BASE ARE BELONG TO US


Re: what does this schematic symbol mean?
« Reply #9 on: May 24, 2011, 01:40:08 PM »

also fair to say that it can be called a sample&hold that goes up to audio rates. hence, therefor, hereto ::strokes beard:: why its a analog sample rate reducer and not the traditional analog>digital>analog converter with variable clock frequency.

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FWALS
Posts: 4


Re: what does this schematic symbol mean?
« Reply #10 on: July 24, 2011, 07:27:05 PM »

Wow!  I don't think I've seen a pedal with so few grounds...  icon_eek That alone begs it to be built.  Should be really easy!  What the heck is this anyway?  Something synth-y?
It's a sample rate reducer.  Kind of sounds like a ring mod.  I built one but was largely unimpressed.

Hey what part did you use for the op amps?
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MikeH
Posts: 3087


Mike H - Ann Arbor, MI


WWW
Re: what does this schematic symbol mean?
« Reply #11 on: July 25, 2011, 02:13:12 PM »

Quote
They're there in spades... albeit virtual ones!

Oh yeah I know, I just mean the literal components to earth.  Don't see that too often in pedals. 

They dont show it on the schematic, but you'll obviously need to ground the opamps.  It's really not that different than other designs of similar complexity.
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"Sounds like a Fab Metal to me." -DougH
tiges_ tendres
Posts: 1675

Steven M


Re: what does this schematic symbol mean?
« Reply #12 on: July 25, 2011, 02:32:57 PM »

Wow!  I don't think I've seen a pedal with so few grounds...  icon_eek That alone begs it to be built.  Should be really easy!  What the heck is this anyway?  Something synth-y?
It's a sample rate reducer.  Kind of sounds like a ring mod.  I built one but was largely unimpressed.

Hey what part did you use for the op amps?

2 4558's  Any dual will do.
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Try a little tenderness.
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