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Recent content by Thota Suresh Avionics

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    [PIC] LCD not working on External Oscillator

    LCD not working with External Oscillator Hi, I am using hd44780 4x20 LCD to display some data.. I am using PC30f5011 controller and external oscillator configured as XT Oscillator with PLL4X... its not showing any data only Back light is switching On. External Oscillator tested its working...
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    [General] Current measuring through CT

    Hi,Thanq for the reply.. Can you please post your circuit so that i can check thanking you.
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    [General] Current measuring through CT

    how to reduce shunt resistance for the above circuit ? We cannot change reference voltage :cry:
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    [General] Current measuring through CT

    Hi, I am measuring current through 5 Amps CT,which can measure maximum of 5-Amps, I don't know the number of turns in CT. I have tried different shunt values to get 1 Volt at maximum CT rating and i have used 860E shunt value , i could find 0.96 V at 5-Amps load on CT. I am reading 0.96V at...
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    [PIC] AC Voltage measurement by using ADC

    I have declared it in adc header file as 128
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    [PIC] AC Voltage measurement by using ADC

    I am utilizing two channels of ADC in PIC30F5011, one for reading what Input Voltage that is going to Servo Motor, and the other channel for reading Output Voltage from the same Servo Motor. I have used two of same differential amplifier circuit built with MCP6294 as shown in this thread posting...
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    [PIC] AC Voltage measurement by using ADC

    Can you please explain me where i am going wrong?? with the hardware or software?
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    [PIC] AC Voltage measurement by using ADC

    No i used Op-amp, i attached schematic above... in program calculated RMS for ac current - - - Updated - - - #define DC_Offset1 2042 #define DC_Offset2 2042 //for Analog Pin #define DC_Offset3 2042 //For analog pin #define OPV 5.035 //operating controller voltage #define Gain...
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    [PIC] AC Voltage measurement by using ADC

    Hi, I am using Pic30f5011 Controller, 12 bit ADC, EXT OSC with Pll 4x, I need to sense AC Voltage 170 to 280 Volt for Single phase and 3 Phase applications. ADC sensing the voltages and calibration also done but the problem is i am not getting the accurate result, output voltage linearly...
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    [PIC] Read and Write to Flash Memory using SPI

    I will corrections in my calculations, but I need to interface S25FL032P, the connections in my board are as given. In data sheet of S25FL032P it is mentioned as 32-Mbit CMOS 3.0 Volt Flash Memory with 104-MHz SPI (Serial Peripheral Interface) Multi I/O Bus. Range is 40Mhz to 104Mhz. If maximum...
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    [PIC] Read and Write to Flash Memory using SPI

    continuing thread https://www.edaboard.com/threads/329948/ PIC24EP512GP806 MPLAB8.8V Interfacing s25FL032P flash memory with my pic through SPI. Are there any examples how to read and write data to flash memory using SPI ? How do I control the mode of SPI for SCK remains at 0 for (CPOL =...
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    [PIC] UART doesnt work at higher PLL

    YES uart is running when I give values n1 = 2 and N2 = 2 , and M value lesser or equal to 30. buad rate is 9600
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    [PIC] UART doesnt work at higher PLL

    I have taken with values as below ! PLLFDB = 46 --> M = 48 PLLPRE = 2 --> N1 = 4 PLLPOST= 0 --> N2 = 2 Fin = 20Mhz Fosc = 160Mhz Fcy = 80Mhz U1BRG = 2082(BRGH = 0) Fref = 20M/4 = 5Mhz Fvco = 20M * 48/4 = 120Mhz it didnt show up any thing while putting data on hyperteminal.
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    [PIC] UART doesnt work at higher PLL

    PIC24EP512GP806,MPLAB8.8 I trying to work with PIC24 modules and for my first attempt I tried to print on uart. I cannot print any thing , not even garbage values. After PLL I need to get oscilator as 240Mhz I used Fin = 20mhz oscillator M = 46+2 = 48 N1 = 0+2 = 2 N2 = (0+1) *2 = 2 Fosc = Fin...
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    Two functions in the high priority interrupt.

    Normally its not advised to call functions inside an ISR, rather you can rise a flag and based on the flag you can manipulate as required in while loop of the main function. while calling functions in ISR you should be aware of Instruction execution time every time you add up code otherwise the...
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