CPU Ammeter, v.3 - Page 2

Groth · 07-05-2003, 11:07 PM

And here's how I have the difference and summing amps set up. The difference stage uses smaller value resistors for no special reason - mostly a matter the desired RR and RC ratios vs. what was in stock.

Groth · 07-07-2003, 10:23 PM

End of the line for this iteration. While the change of grounding to a star configuration is a good plan, in my reality those new jumpers all acted as antennae.

I was able to choose the error seen at the output by moving my arms, tilting the probe, bumping a wire, etc. Putting the circuit board into a metal project-box helped, but wasn't enough. I was never able to get a consistent, repeatable set of readings.

Coming in version four: a double sided PCB, for better grounding and a more compact layout; trimmer pots, to save a bit of resistor wrangling; protection diodes, because it sucks to kill an ADC.

rogerdugans · 07-08-2003, 09:17 AM

bigben2k sent me in here since I was asking about how to best guess in another forum

I am extremely interested in your project

And I will be following your results closely

Thanks for your work!

bigben2k · 07-17-2003, 07:50 PM

I knew that these graphs looked familiar...

http://www.e-insite.net/ednmag/index...=7%2F10%2F2003

BillA · 07-18-2003, 08:48 AM

good link Ben

Groth · 08-30-2003, 07:02 PM

When it comes to ways to spend a summer accomplishing nothing, there's nothing like a cute young thing in town for a summer internship. Did you know that the same groups of muscles are used for both cycling and a good pelvic thrust? Mmmmm, cross training.

Ah well, now it's just fond memories and couple of jpg's.

A new motherboard and assorted parts are on the way to get this thing finished. A testing and benchmarking forum now? Cool!

Back to the geek life!

Since87 · 08-30-2003, 08:09 PM

ROFL

Laughed so hard I scared the women folk. (But chose not to explain why.)

Glad to hear you are back in the saddle again. (or have I got that backwards?)

Groth · 08-30-2003, 08:18 PM

Spread the word! Tell those women folk!

Matter of fact, tell 'em I'm fit enough to ride for hours and hours at time....

07-17-2003, 07:50 PM	#29
bigben2k Responsible for 2% of all the posts here. Join Date: May 2002 Location: Texas, U.S.A. Posts: 8,302	I knew that these graphs looked familiar... http://www.e-insite.net/ednmag/index...=7%2F10%2F2003 __________________ WBTA (Water Block Testing Alliance) Nordic Hardware WC 101

07-07-2003, 10:23 PM	#27
Groth Cooling Savant Join Date: Mar 2003 Location: MO Posts: 781	End of the line for this iteration. While the change of grounding to a star configuration is a good plan, in my reality those new jumpers all acted as antennae. I was able to choose the error seen at the output by moving my arms, tilting the probe, bumping a wire, etc. Putting the circuit board into a metal project-box helped, but wasn't enough. I was never able to get a consistent, repeatable set of readings. Coming in version four: a double sided PCB, for better grounding and a more compact layout; trimmer pots, to save a bit of resistor wrangling; protection diodes, because it sucks to kill an ADC.

07-08-2003, 09:17 AM	#28
rogerdugans Cooling Neophyte Join Date: Jul 2003 Location: massachusetts Posts: 10	bigben2k sent me in here since I was asking about how to best guess in another forum I am extremely interested in your project And I will be following your results closely Thanks for your work!

07-18-2003, 08:48 AM	#30
BillA CoolingWorks Tech Guy Formerly "Unregistered" Join Date: Dec 2000 Location: Posts: 2,371.493,106 Posts: 4,440	good link Ben

08-30-2003, 07:02 PM	#31
Groth Cooling Savant Join Date: Mar 2003 Location: MO Posts: 781	When it comes to ways to spend a summer accomplishing nothing, there's nothing like a cute young thing in town for a summer internship. Did you know that the same groups of muscles are used for both cycling and a good pelvic thrust? Mmmmm, cross training. Ah well, now it's just fond memories and couple of jpg's. A new motherboard and assorted parts are on the way to get this thing finished. A testing and benchmarking forum now? Cool! Back to the geek life!

08-30-2003, 08:09 PM	#32
Since87 Pro/Guru - Uber Mod Join Date: Sep 2002 Location: Indiana Posts: 834	ROFL Laughed so hard I scared the women folk. (But chose not to explain why.) Glad to hear you are back in the saddle again. (or have I got that backwards?)

08-30-2003, 08:18 PM	#33
Groth Cooling Savant Join Date: Mar 2003 Location: MO Posts: 781	Spread the word! Tell those women folk! Matter of fact, tell 'em I'm fit enough to ride for hours and hours at time....

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