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  1. Re: Using output pin to power peripherals; Op-amp, voltage reference, voltage divider

    I didn't think there would be any problems but I thought I'd ask to see if there was something I might be missing.

    Thanks for the response.
  2. Re: Using output pin to power peripherals; Op-amp, voltage reference, voltage divider

    Hey George,

    Thanks for checking in. I'm still working on the project, it's going VERY slow due to availability of time, and haven't come to a conclusion yet. I'll be sure to check back in when I...
  3. Using output pin to power peripherals; Op-amp, voltage reference, voltage divider....

    Working on a new project that I want to be very low power while off and powered up with an interrupt on change. I'm planning on having the micro (16LF1847) powered directly by batteries (3 to 3.6...
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    Re: RS232 long distance cable termnation

    Yes you are correct I am driving it directly from the PIC output pin. I was familiar with terminating with the characteristic impedance of the cable for RS485 (differential) but I wasn't sure if...
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    RS232 long distance cable termnation

    I have a 16F886 that I'd like to send 9600 baud RS232 half duplex data to a monitoring laptop setup with a terminal program. The distance is 1000'. I made a test setup with 1000' of un-terminated...
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    Graphic LCD display module design advice

    Hi All,

    I’m embarking into realms unknown on a design project and I’d appreciate some advice to help me choose the proper path. After some time I’ve finally found an LCD that I’d really like to...
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    Thanks Joe S., I should know better. All is fine...

    Thanks Joe S., I should know better. All is fine now.
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    Me too. Nada, doesn't work. Pin stays...

    Me too.



    Nada, doesn't work. Pin stays high, don't see any change with a scope. It always sees Heart_Beat_LED = 0.

    Interestingly enough, which I left off the earlier post, if I write:

    ...
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    16F684 Basic Functionality

    Having a few problems getting some basic functions to work properly on a 16F684, not sure if I can see the forest through the trees now. Basically I can't get the toggle function to work, works fine...
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    SMT Gas Pressure switch, suggestion anyone?

    I'm trying to find a simple "one bit" inexpensive surface mount pressure switch that will activate at 2 psig and handle excursions to 200 psig. Can't seem to find one.

    Also thought about a...
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    I believe I had a similiar issue when I started...

    I believe I had a similiar issue when I started trying to save files in directories other then the default dir under Mecanique/MCS. I now just use the default directory and move them around when I'm...
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    I had V4.20, I now have V4.24 beta and all is...

    I had V4.20, I now have V4.24 beta and all is good.

    I also upgraded my Microcode Studio and I'll now look at my PBP version level.

    Thanks yet again,
    Mark
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    16F883 Code Verify Problem

    I'm having a "code verify error" pop up when I program a 16F883 chip. I'm using a Melabs U2 programmer, PBP, and Microcode Studio. I only have VDD (+5VDC), VSS, ISCPDAT, ISCPCLK, and /MCL (pulled...
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    And I just keep trying to make it harder. That's...

    And I just keep trying to make it harder. That's what happens when we don't look at the big picture and get lost in the trees.

    Still, it should be harder then that .... shouldn't it :)

    Thanks,...
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    The input impedance is 1000M, pretty darn high. ...

    The input impedance is 1000M, pretty darn high.



    Ahhhh, yes. I tried just connecting the PWM across the voltage divider and it looks great. I looked at the block diagram of the DPM and there...
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    2nd order Low-pass passive RC filter on PWM

    I have working a PWM output driving the input of a 0 to 200mV digital panel meter, but would like some input/review of the filter. I'm running the uP @ 4MHz, the PWM at 3.9kHz with 10 bit resolution...
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    Thanks all, works like a champ. I knew I'd done...

    Thanks all, works like a champ. I knew I'd done this before, but apparently I'd forgotten. It all came back once I got back on the bike. I just needed a push start.

    Thanks again,
    Mark
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    I think an array may work, I'm playing with it...

    I think an array may work, I'm playing with it now.

    To answer your question mark at the end of the message, essentially I have three sensors which need calibration and one button used to do the...
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    Variable within Variable

    I would like to use a variable within a variable ie instead of:


    If Data_Sen1 = 255 then

    I would like to use:


    If Data_Sen(Current_Sensor) = 255 then
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    Ahhh, yes, that works. And you would've thought...

    Ahhh, yes, that works. And you would've thought after reading all those posts about not forgetting the brackets..... I did mess with them a bit, however, I think after my nomenclature confusion...
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    Hey Darryle, thanks for the response. Well...

    Hey Darryle, thanks for the response.

    Well ..... One of two things, I either don't completely understand your answer or I don't think that's what I'm seeing. Let me walk through it.

    >The I2C...
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    Trouble with I2C - Part 1

    Hey all,

    I'm interfacing a Max5477 digital pot to a PIC16F627 with PicBasic Pro V2.47. It took me a bit to get it to work and the problem I see is that the I2CWRITE command's subsequent...
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