pgr2002
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The connections are not swapped, the display symbol has a typo, f/g letters swapped.
Hi,
There may be differnt displays aournd with differnt pinning.
Thus the only "safe" way is to find the partnumber (usually printed on it) and read the datasheet.
Everything else is guessing and may be false.
Klaus
Hi,
There may be differnt displays aournd with differnt pinning.
Thus the only "safe" way is to find the partnumber (usually printed on it) and read the datasheet.
Everything else is guessing and may be false.
Klaus
Hi,
I am not surprised that a veroboard design gives wrong reading.
I guess you don´t use a proper GND plane ... and without GND it is more difficult to get it working accurately.
We maybe can give you some wiring hints when you show us your veroboard.
Klaus
Not clear how you are adjusting a capacitance meter with a reference resistor. May be you are referring to design documents not yet undisclosed in this thread. Without giving all related information, the question leads nowhere.
Hi,
I am not surprised that a veroboard design gives wrong reading.
I guess you don´t use a proper GND plane ... and without GND it is more difficult to get it working accurately.
We maybe can give you some wiring hints when you show us your veroboard.
Klaus
I guess this means that the soldering side is a GND plane. Not sure.Note: The layout is the one with the copper surface, the solder side.
Hi,
4th page:
I guess this means that the soldering side is a GND plane. Not sure.
Let´s imagine you don´t know about the wiring.... could you tell from the tiny picture you gave us - and only one side - which part is connected to which other part ...and how?
Often on can see from the documentation whether a design is good or not. It´s clearly a hobbyist´s project. Using a two wire measurement method for ESR down to 10 mOhms is more than optimistic.
--> better try to get the original ELV description.
Or even better: go through some (professional) application notes provided by semiconductor manufacturers.
Klaus
Hi,
this surely does not work like a GND plane.
What also worries me: In the original design I see about 25 resistors. I miss them on your board.
Discard or not:
I´d say you need a good portion of luck to get it reliably working.
And it´s hard to debug it for someone who did not do the exact circuit on his own.
Klaus
Hi,
if you say so.
But I can´t see them.
Klaus
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