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How does a pre-amplified pH sensor work?
Consider a "pre-amplified" pH sensor such as https://www.omega.com/pptst/PHE9...   There is only a single BNC connection.  Does the RTD temperature compensation as well...
Tuesday, 4 September 2018 - 14:52
Looking for some 'Freak to rebuild IAR application
Also posted in Off-Topic to get more eyes...   A customer of our board house needs a legacy app rebuilt.  About 10-year-old app, and obsolete components and similar...
Tuesday, 24 July 2018 - 14:56
MicrochipDirect pre-programmed AVRs -- how to
We are assisting our board house with specifying the build for another of their customers.  Mega64 app that had pre-programmed from factory/distributor in the past.  As...
Friday, 29 June 2018 - 15:57
Xmega -- How to detect USB
A design is going onto paper, with an Xmega384-C3.  It will not be USB powered as the Xplained is, so we didn't get any hints there.   The question is what is the usual/...
Friday, 1 June 2018 - 13:43
C question -- init string without trailing null possible?
I seem to recall a discussion on this in the past, but cannot find it.   I want to put an array of structs into flash.  (but flash or EEPROM or SRAM shouldn't matter, I...
Wednesday, 27 September 2017 - 19:21
How many "powerful" instructions?
My pdp8/e reference card, circa 1970   [attachments too big for wysiwyg apparently...]    
Sunday, 5 March 2017 - 20:14
Mega324PB tough to find - Split from Mega328PB thread
gchapman wrote:Mouser Electronics ordered some. That was in October.  Still not there:   Mouser Part #: 556-ATMEGA328PB-AU Mfr.'s Part #: ATMEGA328PB-AU...
Wednesday, 1 March 2017 - 16:46
Math help--Hydrophone voltage output scale
A prototype app is using a hydrophone http://www.aquarianaudio.com/h1c...   The datasheet says under Specifications which is confusing to us...a uPa is less than a butterfly...
Thursday, 23 February 2017 - 16:53
Adding GPS tracking
A customer has requested that we add GPS tracking to the device, which is a commercial/consumer rental device.  Think "lojack" -- when not returned, or stolen, they want to...
Wednesday, 30 November 2016 - 14:09
Replace venerable TI-36X Solar Calculator
After 30 years or so, I gave my TI-36X solar calculator a [too] hard drop and now I'm missing a few segments.  :(   From http://www.datamath.org/Sci/Mode... Texas...
Tuesday, 16 August 2016 - 14:59
(1<<bitnumber) expression considered harmful
Apologies to Edgar Dijkstra: Go To Statement Considered Harmful   The below has been at least mentioned a few times on 'Freaks over the years...   (1<<bitnumber)...
Thursday, 11 August 2016 - 19:55
AA alkaline discharge curve @5mA
Can anyone point me to a typical discharge curve for a AA alkaline battery with a 5mA discharge rate?  A quick Google search only uncovered curves down to 50mA; all others...
Tuesday, 5 July 2016 - 14:56

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