[volt-nuts] Traveling Standards

Bob Smither smither at c-c-i.com
Tue Aug 30 19:51:08 UTC 2011


Andreas Jahn wrote:
> 
>> The schematic is attached to this page:
>>
>>   http://www.c-c-i.com/TS
>>
> 
> Mhm,
> 
> im missing a 100nF at the output of the 7815.
> and a 100 nF directly at the heater input  of the LM399.
> Also at the MAX6350 a 100nF is missing.
> 
> It is essential that these capacitors are located directly
> at the pins of the respective ICs.

Thanks for catching that!

I will have to adjust my packaging concept, but have added those parts. 
  See the updated schematic here:

   http://www.c-c-i.com/ts

> I have seen a 3,3V Voltage Regulator shifting output voltage by
> several 100mV with a 3V/m electric field strength.

I tried with a hand held walkie talkie - big effect.  More notes to add 
to the instructions that will go with the traveling standard.  My cell 
phone did not cause a measurable disturbance.

Thanks again,
-- 
Bob Smither, Ph.D.                                     Smither at c-c-i.com
========================================================================
         "The most potent weapon of the oppressor is the mind of the
          oppressed." - Steven Biko
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Circuit Concepts, Inc.                                      281-331-2744
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