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Recent content by chi239

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    Help required for ST7920 GLCD with Arduino GLCD

    Help required for ST7920 GLCD with Arduino Uno Hello there, I am a newbie with Arduino. I have hooked up a ST7920-based GLCD display with an Arduino Uno. I can display the first page OK. I want to display the next page when a pushbutton (SW1), connected to D11, is momentarily pressed. I cannot...
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    [SOLVED] Help required for Arduino Uno Heater Controller

    Hello c_mitra, Thank you for your suggestions. I am already using a zero-crossing detector detector with the triac for heater control. I didn't mention it in my earlier post for the sake of brevity. Regarding the case of negative temp difference, it is also taken care of in lines 24-26 of my...
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    [SOLVED] Help required for Arduino Uno Heater Controller

    Hello c_mitra, Thank you for your suggestion. I made the correction and now it is working fine. Thank you once again! :-)
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    [SOLVED] Help required for Arduino Uno Heater Controller

    Thank you, mate. I understand that it should be "pulseWidth - 255." Although I don't see how it will affect the working of the sketch, I will try it out tomorrow and revert. Thanks once again.
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    [SOLVED] Help required for Arduino Uno Heater Controller

    I am a novice in Arduino. I am working on a temperature controller for a hot plate. I have a PT100 as sensor which is being driven by a 1mA constant current source. As the resulting output voltage is quite low, I am using an OpAmp for a gain of 11. The output of the OpAmp is connected to pin A4...
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    PIC 16F877A ADC Help Required

    Hello Tahmid, I need your help again. I have to pick up 5 analog values, one after the other. (With the 10-bit ADC in the 16F877A, these will obviously lie between 0 and 1023). Now, I need to check whether each of these values lies within a specified band. If not, then an output should be...
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    PIC 16F877A ADC Help Required

    Hey Tahmid, I got the thing to work after all. It looks like to AN0 pin was defective :-( I changed the microcontroller and your code worked like a dream! Thanks a zillion, mate! Cheers!
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    PIC 16F877A ADC Help Required

    Hello Tahmid, Do you think I need to use the ANSEL command?
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    PIC 16F877A ADC Help Required

    Sorry Tahmid. I tried it, but it doesn't work. Don't you think we should initiallize ADCON0 also? The funny part is - if I try ADCON0=0x85, ADCON1= 0x80 and TRISA=0x01, it works with AN3 as input. But then all other PORTA pins also become inputs. I want to use the other PORTA pins as digital...
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    PIC 16F877A ADC Help Required

    Thank you Tahmid. I will try it out later today and get back to you.
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    PIC 16F877A ADC Help Required

    I am a beginner. I am developing a card around the PIC16F877A (4MHz). I want to use the ADC (single-channel) with AN0 as the input. All other PortA pins are to be used for Digital I/O. I am having trouble in configuring the ADC. I am using ADCON0=0x85, ADCON1= 0x8E and TRISA=0x01, but this does...
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