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Thanks vfone for the help. The crystal of the modulator have this number (J04-000044). I am not sure about the frequency that it work but maybe its 6 MHZ. So i will try to find a crystal 5.5MHZ to replace it
Hello
I bought RF modulator (Mercury RF modulator) to convert Scart to Rf. The video works fine but there is no sound. I think that the problem is with Pal. The modulator that i bough is from United Kingdom. The PAL in UK is PAL I but in Cyprus is PAL G. Does anyone know how i can fix the...
I didn't find the solution yet. I will check again the code and the potentiometer if it work fine. Maybe the potentiometer "jump" some values (for example from 2.3 Volt goes to 2.6 Volt) so maybe this the reason that i have this graphic.
I have make the calculation in Excel and i find out that...
I will go now to check it. I was afraid, that maybe was a software problem. Maybe after the first quarter (of the line), didn't store all the value to the lookup table. So if in some position of the address of the lookup table it didn't store anything (so we have 0 Volt) so maybe this will be...
I think so that it should be straight line (diagonal )like the first quarter or it should have small steps like the figure 6
I don't understand why after the first quarter it go down to 0 Volt and the return back to continue the line. This think i will try to solve tomorrow.
I was wondering if...
Hello Keith
Yes i have an ADC in the PIC so i digitize the analog input and calculate with pic the inverse of input signal. I store the output at lookup table and the i send it to an external DAC for the output. Something like the example in the link.
I have made some test today. I think that...
Hello exnol
I want to make something like this (see the 1st page)
I will try again to find the solution with those thinks that i read in this web site and if i will not find the solution, i will try to explain it better.
Hello
I want to give an analog input to pic18F452 by a temperature sensor or potentiometer. From the curve of the analog input i will find the equation. After that i will find the inverse of this equation and i will store it to the pic. And finally i want to compare the input signal with the...
Finally i found the solution.
I make this changes
OpenADC( ADC_FOSC_32 & ADC_LEFT_JUST & ADC_3ANA_0REF,
ADC_CH0 & ADC_INT_OFF );
.....
......
result = ADRESH;
step=5/255;
Dout = result/step;
degrees=72*Dout; /*Y = k * X + n
so: Y = 360, X = 5, n = 0...
Hello
I want to give an analog input to PIC18F452 but i am not sure about the maximum value that is accepted.
I want to give from 0-10V. It will be OK?
I read the datasheet and the ADC characteristics (page 287)but i am not sure if 10 volt will work fine.
I know that Vref+ (pin5) has to be...
Hello i read this post and help me very much.
This help me to display the right values to LCD
In my circuit i also want to send the digital output to a DAC from PORTD. The DAC that i use have 8 pins for input. So i must lost 2 bits every time.
When i work with RIGHT JUSTIFIED and...
Hello kakar133
I don't know if you waiting for answer yet. I have the same problem. Try to change the right justified ->Left Justified.
And then replace PORTC=ADRESL; with PORTC=ADRESH;
With this you will lost the 2 LSB of the 10 bit (of pic ADC).
I hope this will solve your problem. I still...
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