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  1. Replies
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    3,152

    ADC Vref+ on PIC16F88

    Hi all,

    Can i connect the pic's :
    Vref+ = 5V (Vcc)
    VRef- = 12V
    Measure at 12.5V

    and get the reading as 0.5V = 102.4 unit after the conversion of 10 bits...
  2. Replies
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    13,341

    Thank you aratti, I will study the pdf. ...

    Thank you aratti, I will study the pdf.





    By the way, what is the maximum Vref-, Vref+ and the voltage the pic can measure?
  3. Replies
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    9,028

    Maybe a low ohmic resistor 0.01ohm 5W is suitable...

    Maybe a low ohmic resistor 0.01ohm 5W is suitable in the application.

    The hall effect sensor normally is very expensive in my country.

    Let say the total amp flows is 15A,:

    Voltage dropped =...
  4. Replies
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    13,341

    Thank you, aratti. Really appreciate your...

    Thank you, aratti.

    Really appreciate your suggestion 1 and 2. Your suggestion one really help me to protect my resistor and the opto couple.

    However please forgive me because didn't give the...
  5. Replies
    21
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    13,341

    Hi LinkMTech, thanks for your help. I will...

    Hi LinkMTech,
    thanks for your help. I will try it out, but if you can provide me the simple schematic or guidance to setup the op-amps without offsetting the voltage, that will be good. I'm not...
  6. Replies
    21
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    13,341

    Hi, The signal is a output voltage form a...

    Hi,

    The signal is a output voltage form a sensor and it is connected to the ECU (engine control unit) that will pulsing the fuel injector. The pic is always monitoring the signal (on...
  7. Replies
    21
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    13,341

    Hi Melanie, This is my explanation: ...

    Hi Melanie,

    This is my explanation:

    1.The J3.1 is the incoming signal(iV) that i want to measure, so i connect it to RA4.
    2.The iV also connect to a relay at NC. At the normal...
  8. Replies
    21
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    13,341

    Hi Melanie, First of all thanks for your...

    Hi Melanie,
    First of all thanks for your reply. I really appreciate it.

    Attached is the schematic. The problem happens at PortA.4. However I already connect the incoming signal to PortB.7...
  9. Replies
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    13,341

    Anyone can explain to me: The maximum...

    Anyone can explain to me:

    The maximum recommended impedance for analog sources is 10 kΩ. This is required to meet the pin
    leakage specification.

    1.What does this means?

    2. How to measure...
  10. Replies
    21
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    13,341

    Hi all, I have tested the setting, but the...

    Hi all,
    I have tested the setting, but the PORTA.4 still pull down the signal to 0v.
    Just for your info, the signal is Voltage fluctuated between 0 to .9 v.

    don't know where i did...
  11. Replies
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    13,341

    Thank you Melanie, Thanks for your reply. ...

    Thank you Melanie,

    Thanks for your reply. I have learn something what i have missed. I will try them out and post the result later. Thanks!

    Really appreciate your help, Melanie
  12. Replies
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    13,341

    Thanks for the reply. Below are my declaration...

    Thanks for the reply.

    Below are my declaration

    OSCCON = %01101110 ' 4 MHz, primary clock, internal RC

    PIR1 = %00000000 ' clear all flags particularly A/D IF bit 6
    SSPCON = %00000000 ...
  13. Replies
    21
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    13,341

    Thanks for your reply... I just try for 2.2k...

    Thanks for your reply... I just try for 2.2k resistor but also give me the same result. The Signal voltage to measure also drop to 0v...

    From the internet surfing...... the PortA.4 is open...
  14. Replies
    21
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    13,341

    PORTA.4 as analog input

    Hi all,
    I'm having problem to use the porta.4 as the analog input for PIC16F88... When i connect the signal line (0.1v to 0.9v) to porta.4, the signal voltage will become 0v. I have tried to...
  15. Replies
    0
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    3,651

    AT command set to retrieve the web page

    Hi all!

    I'm currently using the at+cipsend to retrieve the webpage... still always return bad request..

    Anyone have the idea please help. Thanks!
  16. Replies
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    6,310

    Thanks! The only thing if using usb to serial...

    Thanks!

    The only thing if using usb to serial converter, most probably we need to use the hard reset button to pull the MLCR to Gnd. Is the above statement true?

    If the loader file that I have...
  17. Replies
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    6,310

    Thanks for both of you of the reply. By the...

    Thanks for both of you of the reply.


    By the way, do I need to setup all the configuration such as the ADC, comparator in the bootloader file? Or when setup it up in the program code?

    Please...
  18. Replies
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    6,310

    Microcode Bootloader without MAX232

    Hi all,

    It is so exciting that we can program the chip without using the real programmer.

    Previously, i was using my old pc with parallel port and epic programmer to program the pic. But since...
  19. Replies
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    5,538

    Buying PIC In KL

    Yes, sometime buying PIC will be difficult. Anyhow, you can give a call to Mobicon in Old Klang road. They are selling various type of PICs with resonable price in quatity of X10 pieces.

    I...
  20. Thread: Voltage Drop!

    by kblim
    Replies
    1
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    1,976

    Voltage Drop!

    Hi all,

    Please help me. I am developing a board for the filling machine. Facing problem when I HIGH the PortA.1 in 16F88, the normal 5Vcc will drop to 4.8XX volt.

    This make my...
  21. Replies
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    2,834

    PBPro Manual

    HI,

    actually i think you can download the pdf manual version in www.picbasic.com.
  22. Replies
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    19,989

    How to setup Debug in Open Mode Like SerialOut

    Hi all,
    I was previously using the SerOut2 to send data, but the data line was sharing by few PICs and I have used Open Mode.
    Recently porting my code by replacing SerOut2 with the Debug...
  23. Replies
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    19,989

    Using Open Mode with Debug/DebugIn

    Hi all,
    Just wonder how to define the debug to communicate with the open mode when receiving serial data from other device. Using the open mode because need to share the data line with few...
  24. Replies
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    ifficult to get the serial interface GSM phon

    Hi all,
    The use of GSM phone as the communication module via SMS is the successful one. I have use this method to collect the data from the remote site.
    Discussion here are more on...
  25. Replies
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    252,300

    Difficult To Get The Serial Interface GSM Phone

    Hi all,
    The use of GSM phone as the communication module via SMS is the successful one. I have use this method to collect the data from the remote site.
    Discussion here are more on...
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