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Title: Help With A Little Project Post by: jeanninemtv on January 05, 2006, 05:15:43 17:15 I NEED TO MEASURE THE RATIO BETWEEN IN AND OUT MEASURED BETWEEN A POWER TRANSFORMER ...
I THINK I WILL USE A PIC, BUT I HAVE A LOT OF PROBLEMS ABOUT CONDITIONING THE SIGNALS (1 ... 10 KV- 220v AC) TO THE "innocent" pic analog channels. can anyone of us help me? :confused: :o :eek: :p Title: Help With A Little Project Post by: Yazi on January 05, 2006, 06:06:19 18:06 I think I can help you ;) just waite :)
Title: Help With A Little Project Post by: jeanninemtv on January 05, 2006, 08:45:37 20:45 thanks, ... i need the signal conditioning part, the microcontroller part is easy on basic!!
i dont know how to handle the KV and 220 V and put it to measure in / out with the lowest error possible .... thanks my friends!! Title: this is the aquisition of AC signal using Post by: Yazi on January 06, 2006, 11:18:41 11:18 it work fine in hard in one of my old projects
measure of rms value of the input Vin ,rms value Vout and display it on LCD 2*16 software with hitech 8.05, IDE MPLAB 6.40 enjoy:) Title: Help With A Little Project Post by: jeanninemtv on January 06, 2006, 03:11:40 15:11 thanks, i think i can do the program for the micro by myself on basic...
but i need some help about howto make the conditioninng stage for the AC measurements ... 220V in one side of the transforemr and 1KV on the other side .... ratio= 1KV/ 220 = **** Title: Help With A Little Project Post by: Yazi on January 06, 2006, 03:34:50 15:34 the sensor used in my designe is calculed for 220v, you can make a big resistance for 1kv, for the output you can use the same sensor (150k+100 k)*2 + 5k but for 1kva use multiplication by (1000/220) :) if you love your pic
Title: Help With A Little Project Post by: alejandro on January 06, 2006, 04:03:25 16:03 it´s important you make your high sensor resistance with a chain of resistor but not only one of great value to measure 1 kv. I used 6 resistors in series of 1 MOhm/1W and a preset of 100K with the cursor to the pic and a C of 1uF 25V.
Title: Help With A Little Project Post by: jeanninemtv on January 06, 2006, 07:12:53 19:12 hasanyone any schema? it s possible to simmulate on proteus any stage???
Title: Help With A Little Project Post by: picstudent on January 11, 2006, 04:25:00 16:25 interesting, but i have no idea at this moment for acconditionating
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