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Sonsivri > Electronics > Pic C Languages (Moderator: o2) > 8 channel voltmeter (help)
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arash
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« on: December 23, 2005, 05:47:13 17:47 »
Hi.
I was make 8 channel voltmeter (0-5) with diffrent inputs.It works good in proteuse but in real  when i  
 
connect a voltage to channel 0, it's affect will change the other channels voltage.How can i solve this?
Thanks.
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LazBoy
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« Reply #1 on: December 23, 2005, 07:17:40 19:17 »
Use pulldown resistors for stability and against rest cahannel effect.
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arash
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« Reply #2 on: December 24, 2005, 04:18:49 04:18 »
I allready use 10k pulldown resistor but no change was apear.
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robban
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Warrior


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« Reply #3 on: December 28, 2005, 03:31:12 15:31 »
Hi!
 
I upload a terrific application note from Microchip where all Yr questions will be answered.
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Code Warrior
entekelektronik
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« Reply #4 on: May 10, 2006, 06:43:21 18:43 »
Hi
Put delay routin (50ms) after he selected chanal no..then enable  converter (ADC).
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BLK
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« Reply #5 on: January 03, 2008, 05:24:11 17:24 »
check ground path, end reference voltage
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tenir
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« Reply #6 on: January 06, 2008, 12:10:40 12:10 »
take a lot of measurement and calculate average of them and use delay after selecting channel.
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LazBoy
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« Reply #7 on: January 07, 2008, 09:00:40 09:00 »
@BLK

Sorry but please check message posting date.
This is obsolete one.
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human_controller
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« Reply #8 on: January 17, 2008, 02:03:26 02:03 »
If u use PIC C ,change this line

#FUSE  LVP  ==>  #FUSE  NOLVP

#FUSE  BROWNOUT ==> #FUSE  NOBROWNOUT
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