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Recent content by williamchia

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    Problem with LED flashing program in MPLAB

    Hi all, For half month, i have been trying to write a simple program using MPLAB to make the LEDs flash but not working. Have been checking and trobleshooting upside down, left to right but still dunno what is the problem.. Then i down-grade to just making the LED light up (I'd be very happy...
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    Executable code and data must be defined in appropriate...

    Hi, After following everything on the tutorial (URL: https://www.mikroe.com/en/books/picbook/4_07chapter.htm) everything works all right, but when i try to assemble the file, this message comes out " Executable code and data must be defined in an appropriate section" I think i should be...
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    Bank selection in 877A

    Hi all, I keep on recieving this message "Register in operand not in bank 0. Ensure that bank bits are correct" (Using MPLAB) The register is in Bank1 (TRISA) and i type the code "BSF 03h,RP0 BCF 03h,RP1 " (From 877A data sheet: bank 0 = RP1:RP0 = 0...
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    What is "ground"?

    yea, 9V battery. What do you recommand for power supply? I am using battery because they are cheap and other power supply seems will cost a lots. ok, now i am trying the program that i wrote for the microcontroller *PRAY*...
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    What is "ground"?

    Actually i am not quite sure. the battery was working because when i tested with multimeter, there was in fact 5V running in the circuit. I dunno, it just work when i change another battery...
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    What is "ground"?

    It works now!! Thanks! The problem is..well...on the battery...(After struggling for 3 days trying to find out what went wrong) Anyways, thanks a lots,pravardhan. Regards, William
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    What is "ground"?

    Hi pravardhan, My final goal is to use the microcontroller to do analog digital conversion and send the data to pc. I am just testing it on simple project first..and it is so sad that...i couldnt even make the two LEDs flash... I have used the microcontroller programmer and transfer the hex...
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    What is "ground"?

    Hi all, Sorry but i am still not sure what is it? I am doing a circuit to flash 2 LEDs, and i use only one 9V battery. "+" of the battery is possitive and "-" is negative (obviously...), then what is gound? Does the "negative" means ground in this case? The circuit is attached (taken from...
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    Standard 40 Ways IC socket cannot be put into a breadboard

    Hi all, I got so frustrated the last two days when everything seems all right but just the LED doesn't flash when it should. So, i went to double check everything, including the codes, the programmer, the compiler and even read the datasheet again but nothing seems wrong. However, when i...
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    Trying to understand the symbols on the circuit

    Hi all, I am trying to build this circuit but there are some symbols that i don understand. Sorry if my questions are too basic. 1. There are 4 "triangles" symbols (below R1, pH probe, D1 and R8 ). I guess these are reverse bias voltage or sth (not sure). what component should i put there...
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    Transferring analog signals to PC

    read analog signals through usb device Greetings to all! I am trying to convert the analog signals to digital signals and transfer them to PC. My plan is Detector --> A/D converter-->microprocessor --> USB --> PC I am having problem with the microprocessor part. I don't hav a microprocessor...

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