Something is not quite right here...

[madbean]

I can't put my finger on it though....hmm.

So nice to find these things AFTER you build them.

[wgc]

I love finding them right after notice comes that the pcb shipped

[jimilee]

Man, I wish I knew what I was looking at, it's gotta be funny, i just  know it...you design them, I'll just keep building them...:-p

[rullywowr]

Nothin like putting the source for VB outside of the voltage divider. Shows that Bean is human like the rest of us after all

[alanp]

Not quite -- if I'm understanding this rightly, +9V should be where VB is, and VB (along with the smoothing cap) should be where the right angle join between the two 100k resistors is.

Or I could be completely talking out my ass.

[selfdestroyer]

Man, I wish I knew what I was looking at, it's gotta be funny, i just  know it...you design them, I'll just keep building them...:-p

i'm with you Jimi.. glad I'm not alone.

Cody

[rullywowr]

Not quite -- if I'm understanding this rightly, +9V should be where VB is, and VB (along with the smoothing cap) should be where the right angle join between the two 100k resistors is.

Or I could be completely talking out my ass.

That's exactly correct.

[Justus]

Man, I wish I knew what I was looking at, it's gotta be funny, i just  know it...you design them, I'll just keep building them...:-p

Nothin like putting the source for VB outside of the voltage divider. Shows that Bean is human like the rest of us after all

Not quite -- if I'm understanding this rightly, +9V should be where VB is, and VB (along with the smoothing cap) should be where the right angle join between the two 100k resistors is.

i'm with you Jimi.. glad I'm not alone.

Uh...  I'm with Jimi & Cody.  What's VB?  lol

[muddyfox]

It's a bias voltage, created by halving the input voltage (9V) by a voltage divider formed by two equal resistors.

It is commonly used to bias an opamp so the output can go equally far below and above the 4.5V rail.

[wgc]

Not quite -- if I'm understanding this rightly, +9V should be where VB is, and VB (along with the smoothing cap) should be where the right angle join between the two 100k resistors is.

Or I could be completely talking out my ass.

This is how I interpreted it.  I made the same mistake on a dirt pcb I did recently.  Take two in the works.

[the3secondrule]

Uh...  I'm with Jimi & Cody.  What's VB?  lol

pretty sure this is what you guys are talking about, right?
http://en.wikipedia.org/wiki/Victoria_Bitter

[TGP39]

I actually think this is a great idea. Maybe show a little snippet of a circuit and talk about what's right, what's wrong and how to improve it.  Let's call it Circuit of Fifths. I know I learned something very important from just this little post by Brian.