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Re: 2 Degree problem with +0.1% constant temperature oven
Thanks andre. it lowered it to +-1C which may work around I think. i am also thinking of using traic.... thanks
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thanks for your keen interest and support!
only on thing to consider I am Botanist (my recent...
Re: 2 Degree problem with +0.1% constant temperature oven
should i use arduino PID lib? how to calculate/compensate Stored Thermal energy in NiCr Road?
can i use 2 different sensor for more accuracy?
2 Degree problem with +0.1% constant temperature oven
Hello there!
i am building a 40°C to 100°C +1% oven for drying organic material at a constant Temperature.
Oven consist of 4 Heating Nichrome (NiCr) Rods.
A 10K thermistor (replaced with LM35).
ATMega328 & LCD. MCU read the temp and...
post#4 by MRahman (sine_tech_mail.rar) have all the required Schematic and PCB files :-) ...
use PIC16F72 and HEX from post #53 ( rk_sin_mod.rar) for LED display by naseerak and if you want to use LCD then change the PIC16F72 with PIC16F73 and use the Hex from post #53 ( sn73_lcd_b.rar) and...
Bawa just look and observe at the LM358 current/voltage control section in the pcb if you have eagle. otherwise tell me to convert it to any other possible mean for you.
yes the current calc will be for 90A ..... i think the turn ratio doesn't matter in my case.
i m using 8v and offset= 4V and per Amps resolution is 0.033V . my main problem is programming.. ( defiantly this can achieve by code)
Paul you hit the nail but the problem is only 1 RA3 is spear and...
now we are getting some way.
Measured Current = (Vsensor - 4.0) / 0.033
so 5v on DVM will be:
(5V - 4V)/ 0.033 = 30 Amps (checked with DTM21 DVM and Ammeter):thumbsup:
should i use boost circuit to get a round figure data for ADC or do it through...
Thanks for your replay ravindragudi.
First of all i am measuring DC current so this side is smooth. The problem is data read i think. when my DVM shows 4.38v for example the 7 segment shows 00.1 then 23.3 then 99.9 and so on. i thin my approach for the hall sensor is not prompt...
Hi everyone! i am working with CSLA2DG Hall effect current sensor with PIC16F676 and 7 segment display as:
sensor supply volts are DC 8v
out put is DC 4.03 volts at 0 Amps and for every Ampere the voltage increment at 1 mv.
At PIC i used vADC * 500/1023 and (vADC / 10)% 10 is my first digit (I...
i am really sorry for late replay... but i am stuck with another project. when it finish i will work both for you .
go for 25+25 turns!
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48v @ 15 Amps with this design? doesn't sound good. i think a push pull will be more feasible then fly back.
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