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Help a blind man in electricity

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Tightbudget

Jan 15, 2016
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Sorry if this question offends some of you guys, but what to do with the grounding? And audio input and where is the +/- from the 5v source thank youFDWYM1VGD2JJSYJ.LARGE.jpg
 

Colin Mitchell

Aug 31, 2014
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I used to be a blind man. But about 20 years ago I stopped selling blinds.

5v is on the diagram. This is the red lead in the diagram. This is called the positive lead. The black lead from the 5v goes to the earth symbols. This is the negative lead.
 

Tha fios agaibh

Aug 11, 2014
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In other words, all the ground symbols tie together and to the negative (black) supply wire. The audio input wires connect to the top of R3 and to ground (same negative wire)

Hope my answer doesn't offend anyone.

Ps; Should R3 be a variable resistor?
 

hevans1944

Hop - AC8NS
Jun 21, 2012
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I am squinting very hard, but I don't see any color in the drawing @Tightbudget submitted. Where is the red wire?
 

Colin Mitchell

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"I am squinting very hard, but I don't see any color in the drawing"

That's what happens when the "blind leads the blind."
 

73's de Edd

Aug 21, 2015
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.



ME TOO ! ! ! . . . . . . I once was technically blind also . . . . . . . . and I'm still deaf and dumb . . . . .

JwOE8py.png



73's de Edd
 

Tightbudget

Jan 15, 2016
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In other words, all the ground symbols tie together and to the negative (black) supply wire. The audio input wires connect to the top of R3 and to ground (same negative wire)

Hope my answer doesn't offend anyone.

Ps; Should R3 be a variable resistor?
Oh one more thing how do i know wich one is the 123 or 4 from the triangle ic in the drawing?
.
IMG_20160116_202908.jpg
 
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(*steve*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
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If you place the chip so the semicircular indent is at the top and/or the circular mark is at the top left corner (your chip has both , some have only one), then the pins will be on the left and right sides.

pin 1 is on the top left corner, pin 2 below it, then pin 3, with pin 4 on the bottom left corner.

Pin 5 is on the bottom right, with pin 6 above it, then pin 7, and finally pin 8 on the top right corner.

Pretty much all pin numbering goes in a circle, clockwise from the index mark.

Google for a datasheet for this component and it will have all these details as well as many more.
 

Tightbudget

Jan 15, 2016
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If you place the chip so the semicircular indent is at the top and/or the circular mark is at the top left corner (your chip has both , some have only one), then the pins will be on the left and right sides.

pin 1 is on the top left corner, pin 2 below it, then pin 3, with pin 4 on the bottom left corner.

Pin 5 is on the bottom right, with pin 6 above it, then pin 7, and finally pin 8 on the top right corner.

Pretty much all pin numbering goes in a circle, clockwise from the index mark.

Google for a datasheet for this component and it will have all these details as well as many more.
thanks m8
 

Minder

Apr 24, 2015
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And of course, the symbol used for Common implies it is connected to earth ground.:p
M.
 

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Tha fios agaibh

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And of course, the symbol used for Common implies it is connected to earth ground.:p
M.

Yes, I would think the triangle common ground would be the appropriate symbol.

Make me wonder how many people have driven ground rods into the earth trying to satisfy the ground symbols.
 

Tha fios agaibh

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I used to hear "Ground is ground the earth around"
I guess it'd be more accurate to say,.. Earth is earth for what it's worth.
 

Minder

Apr 24, 2015
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There was a lot of expressions I had to get used to when moving from UK to N.A.
One was the term ground for Chassis common and Earth.
In UK it was two distinct terms, Earth and Ground. Not as it is here, Ground for both.
The rhyme reminds me of the US 'A pint is a pound the World around', actually only in US, anywhere else it is a pound and a quarter (20oz).
M.
 

Tha fios agaibh

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We do say ground for everything but we do specify when needed. Earth ground, chassis ground, isolated ground and so forth. Thanks to IEC terms are being standardized.
Never heard that one. A pint is a measurement of volume not weight. A liquid US pint does equal 16fl oz. But is there an imperial pint that equals 20fl oz?
 
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