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In a current measurement (100uA range), when I stroke the outside surface of this analog multimeter with my palm, the finger run towards large scale.
Does human magnetic field affect it?
How can I avoid this kind of casual interference?
In Protel 99 SE, everytime I open a DDB file then close it, even not opening a internal SCH or PCB. There will automatically appear a *.Bkp file which has a same file name with the DDB file in the same directory with DDB file.
I have unchecked the item "Create Backup Files" in the system...
I would prefer call LM317 & LM337 "2 V" voltage drop regulator.
According my own experience, most LM317 & LM337 will work well when Vi - Vout = 2V if you are not so strict in line regulation performance.
how to power icl7106
Thanks all of you...
the power to this voltage-meter is independent to the Measured voltage. It's from a LM7809 regulator driven by a secondary set of the transformer. It means that one transformer has 2 secondary set, so one set is for the bentchtop DC power supply and...
icl7106 power supply
My ICL7106 based LCD voltage-meter has 1 count jitter problem.
This meter is mounted inside a bentchtop DC 30V/3A power supply and is used to measure the output voltage of this power supply. The actual output of this power supply is stable and this problem is from the...
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