I can't put my finger on it though....hmm.
So nice to find these things AFTER you build them.
I love finding them right after notice comes that the pcb shipped
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.
Or I could be completely talking out my ass.
Quote from: jimilee on October 31, 2014, 01:53:42 AM
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
Quote from: alanp on October 31, 2014, 06:21:57 AM
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.
Quote from: jimileeMan, 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
Quote from: rullywowrNothin like putting the source for VB outside of the voltage divider. Shows that Bean is human like the rest of us after all ;)
Quote from: alanpNot 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.
Quote from: selfdestroyeri'm with you Jimi.. glad I'm not alone.
Uh... I'm with Jimi & Cody. What's VB? lol
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.
Quote from: alanp on October 31, 2014, 06:21:57 AM
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.
Quote from: Justus on October 31, 2014, 02:10:44 PM
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 (http://en.wikipedia.org/wiki/Victoria_Bitter)
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.