Saturday Morning Junkbox Project - Voltage Reference.

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#1
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I've been meaning to put this together for a while...

 

 

 

Other than the Adafruit LM4040 breakout it's cost me nothing as it's been 'designed' around what I had to hand. So I now have a 0.1%, low tempco, battery-powered reference for doing quick checks on scopes and multimeters.

#1 Hardware Problem? https://www.avrfreaks.net/forum/...

#2 Hardware Problem? Read AVR042.

#3 All grounds are not created equal

#4 Have you proved your chip is running at xxMHz?

#5 "If you think you need floating point to solve the problem then you don't understand the problem. If you really do need floating point then you have a problem you do not understand."

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Yes, it is an ill wind that blows no good... opportunity to catch up on that list of things I must get around to. I understand that the sale of photo albums has boomed.

Ross McKenzie ValuSoft Melbourne Australia

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Amazon.com: Hosa BNA-100 Dual Banana Connector, 2 Pieces: Musical ...

 

I could of plugged in my banana connector but that blasted BNC connector got in the way!  wink

 

JC 

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Nice job Brian!

 

(Possum Lodge oath) Quando omni flunkus, moritati.

"I thought growing old would take longer"

 

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Nice, neat package.  What's on the inside?

Letting the smoke out since 1978

 

 

 

 

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digitalDan wrote:

Nice, neat package.  What's on the inside?

I'm guessing it's the Adafruit LM4040 breakout, a battery and some air.

 

Four legs good, two legs bad, three legs stable.

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digitalDan wrote:

Nice, neat package.  What's on the inside?

Not a lot. The Adafruit breakout board is tiny and is the only item that can't be seen from the outside.

The battery is in a compartment in the case and is a PP3.

#1 Hardware Problem? https://www.avrfreaks.net/forum/...

#2 Hardware Problem? Read AVR042.

#3 All grounds are not created equal

#4 Have you proved your chip is running at xxMHz?

#5 "If you think you need floating point to solve the problem then you don't understand the problem. If you really do need floating point then you have a problem you do not understand."

Last Edited: Sat. May 30, 2020 - 06:36 PM
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Nice handiwork!!  Can be used in a lot of situations around your lab.

 

 

 

 

When in the dark remember-the future looks brighter than ever.   I look forward to being able to predict the future!