Komponent søges

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Alan Olsen Contact options for registered users 's Avatar (by Gravatar) posted on
October 17, 2003, 9:01 am
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Hej.

Jeg har et lille problem.

Hvis man har 3 signaler ( Analoge og mellem 10 mV - 100 mV ) som man gerne
vil måle på, på skift.

Eks
5 sek. fra signal 1
5 sek. fra signal 2
5 sek. fra signal 3
osv.

Findes der en kreds som kan løse dette problem !

Mvh Alan Olsen



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Roberto Saldo Contact options for registered users 's Avatar (by Gravatar) posted on
October 17, 2003, 9:08 am
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Re: Komponent =?ISO-8859-1?Q?s=F8ges?=
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En analog mux fex?


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Med venlig hilsen/Best regards

   Roberto Saldo, Consultant, System Developer, M.Sc.

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15kw Contact options for registered users 's Avatar (by Gravatar) posted on
October 17, 2003, 10:21 am
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Re: Komponent søges
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En 4051 eller 4052 C-Mos IC sammen med en tæller og en timer til at lave et
clock signal til tælleren.


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   Peter N Petersen
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15kw Contact options for registered users 's Avatar (by Gravatar) posted on
October 17, 2003, 10:46 am
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Re: Komponent søges
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gerne
et

Jeg har lige lavet en lille ilustation til dig, den kan ses her:
http://peteropfinder.dk/_newsbin/amux.html
Håber du kan bruge det.


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   Peter N Petersen
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Alan Olsen Contact options for registered users 's Avatar (by Gravatar) posted on
October 17, 2003, 7:06 pm
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Re: Komponent søges
Tak for dit arbejde.
Det kan godt være at opgaven bliver løst på den måde.

Mvh Alan

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Harald Mossige Contact options for registered users 's Avatar (by Gravatar) posted on
October 17, 2003, 11:22 am
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Re: Komponent søges

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1 stk. LM324 (eller helst ein cmosvariant) for å forsterka signala. Bruk 3
av 4.
1 stk. microcontroller med A/D (AVR 2343, 8 bein, 4 A/D ?)
        SoftUART
1 stk. MAX232.

HM




Alan Olsen Contact options for registered users 's Avatar (by Gravatar) posted on
October 17, 2003, 7:04 pm
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Re: Komponent søges
Jeg takker for alle svarene, men det undre mig at der ikke findes en kreds,
som vedhjælp at en modstand og en kondensator kan klare problemet. ( det er
et ønske at enheden er så lille som mulig.)

Mvh Alan

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15kw Contact options for registered users 's Avatar (by Gravatar) posted on
October 17, 2003, 7:29 pm
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Re: Komponent søges
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kreds,
er

Hvis det skal være meget småt kan det laves med en 8 pins uP (PIC12C508) og
en analog SW (4052). Begge komponenter kan skaffes som SMD og jeg vil tro at
printet kan laves mindre end 3*3 cm enkelt sidet eller mindre end 2*2 cm på
et dobbelt sidet print.


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   Peter N Petersen
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