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[SOLVED] how to get analog data

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sribangaram

sribangaram

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Dear friend's tell me any body ........... how am i getting the anlog data for micro controller
1. room temp
2. 48volts battery bank
3. 230v ac power & 450 volts ac power
Please tell me any body as soon as possible :roll:
 

Re: how to get anlog data

ADC, something like MCP3004-I has 4 analog inputs, and is fairly low cost.
You'll need to scale your 48VDC and scale and rectify the AC supply.
 
Re: how to get anlog data

Dear Friend thanks to your reply already I have ADC 0808 their is 8 inputs and 8 out puts but my problem is how to connect 48volts battery & 230volts ac supply anlog data to ADC0808 in put connection Please explain to me if possible please send the circuit diagram:|

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Dear Friend thanks to your reply already I have ADC 0808 their is 8 inputs and 8 out puts but my problem is how to connect 48volts battery & 230volts ac supply anlog data to ADC0808 in put connection Please explain to me if possible please send the circuit diagram:|
 

Re: how to get anlog data

Potential divider - use a couple of resistors in series across 48v, selected so that you get a voltage between (say) 0V and 5V across one of them.
Similar thing with the AC supply, but then rectify it and smooth with a capacitor. It won't be perfect (there is a volt drop across the diodes) but close
enough.
 
Re: how to get anlog data

Dear friend If possible please send the circuit diagram why because I don't have a that much of mind :sad:
 

I don't think you should be playing with 450V in that case. Google it.
Google on potential divider and the wikipedia page has the cct diagram for it.
Same thing for bridge rectifier - the corresponding wikipedia page has the cct diagram. Stick it on the end
of your potential divider. Then, use a capacitor to filter it, same as any power supply. This is
1st-year uni stuff.
 
Dear friend please check this diagram this is correct or not for 48 volts battery bank anlog out put please tell me:roll:
 

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  • anlog out.bmp
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Its a similar thing.
However, I'd advise you to use a small mains transformer to step down the voltage, if you're not
familiar with what you're doing. Use the circuit shown here.
Whatever that output voltage is, scale it with a potential divider the same way as you did for the 48v battery.
 
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