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  1. Replies
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    Re: 4 -20mA Analogue input help

    Hi All

    Thank you... Thank you ......

    I am more confused than ever now.....But all good advice.... I was thinking I was keeping it simple with my 250R and Op-Amp

    But lots of good advise...
  2. Replies
    8
    Views
    790

    4 -20mA Analogue input help

    Hiya

    Just a quick one ....need to interface a 4-20mA signal to a pic

    I know I can do it with probably a 250R resistor and Opamp LM358

    Wonder if anyone done anything similar

    Or any...
  3. Replies
    18
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    1,660

    Re: VS1838B remote

    Got it

    Thank you
  4. Replies
    18
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    1,660

    Re: VS1838B remote

    Just a question ......Why:-



    I would assume the other way round .....Genuine question. I can never understand software fully :-)

    Andy
  5. Replies
    18
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    1,660

    Re: VS1838B remote

    Hi ...

    I am using same code ish



    Works fine for me also..... But I I am getting false triggers due to mains spikes (My circuit is on a 12v Battery then LDO down to 5v....Was wondering what...
  6. Replies
    3
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    702

    Re: Remote Control I/R TSOP4138 Help

    A Little bit more :-

    The unused pins are set as outputs Using TRISA=00000000 and TRISB=00010000 (RB3 is the i/p for the InfraRed)

    Only other cct is a clock DS1307 on RB1 and RB2 (SDA and SCL)
    ...
  7. Replies
    3
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    702

    Remote Control I/R TSOP4138 Help

    Hi thank you for reading.

    I have the circuit as below....All software is working fine.

    However I am aware the IP Pin on my Processor (16F627A) is being spiked by mains EMI and causing issues....
  8. Replies
    4
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    1,250

    Re: DS1307 Problems help please !!! :-)

    Thank you Both

    Both your replies have been implemented now I am running again..... Always have problems with the If/Then/Next Endif stuff :-)

    Thank you again

    BR
    Andy
  9. Replies
    4
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    1,250

    DS1307 Problems help please !!! :-)

    Hi Thank you for reading...

    Using a 16f627

    All I want to do is turn a light on at a time and turn it off a time later.... What am I doing wrong here.

    Turns on OK but sees to add 4mins to the...
  10. Replies
    10
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    2,859

    Re: Future project Ideas

    Hi Dave

    I did see this chip ..... However the price is unreal as to a couple of caps / resistors and a Schmitt.

    Question :-Would I need the Schmitt as the Inputs on most uChips seem to have one...
  11. Replies
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    2,859

    Re: Future project Ideas

    Thank you again all !!

    Have already reasoned the de-bounce issue.... Old slow contacts, so fairly big unit of capacitance needed to dampen!

    Also a Schmitt trigger to shape the final signal a...
  12. Replies
    10
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    2,859

    Re: Future project Ideas

    Thank you pedja089

    That might just do it :-)

    BR
    Andy
  13. Replies
    10
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    2,859

    Future project Ideas

    Hi Thank you for reading

    Am still looking at a future idea... Involving an old BT Telephone Mech.

    I need the existing "Dial" to give me one digital pulse for each digit dialled..... :-

    As...
  14. Re: WTV020-SD-20SS SD Card U Disk Audio Player Interface

    I have not seen one that can record....yet !!

    Any takers ??

    BR
    Andy
  15. Re: WTV020-SD-20SS SD Card U Disk Audio Player Interface

    Aerostar

    Thank you.

    Just waiting for arrival of boards to play with !

    Also a handful of freeby chips from microchip

    Very much appreciated.
  16. Re: WTV020-SD-20SS SD Card U Disk Audio Player Interface

    Thank you all of you for help advice so far.

    Some interesting bits of info I am digesting

    BR
    Andy
  17. Re: WTV020-SD-20SS SD Card U Disk Audio Player Interface

    Hi Aerostar

    Thank you for reply.... Your choice of MP3 Player looks a lot easier to us than my initial choice, I am not a software guy :-)

    Have you any sample code I can look at for ideas... I...
  18. WTV020-SD-20SS SD Card U Disk Audio Player Interface

    Hi All...

    Just looking at a possible project.... Looking to play upto 10 wav, mp3, sound files on demand from (10) pushbuttons.

    button 1 plays track 1
    etc to
    button 10 plays track 10
    ...
  19. Replies
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    3,389

    Re: LCD -- melabs sample program

    I did exactly the same the other day......Any room in that sand ???

    Andy
  20. Replies
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    1,727

    Re: LCD_LINES Question Help ?

    Hi Scampy

    So for 2 lines ........LCD_LINES 2

    Thank you

    Andy
  21. Replies
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    1,727

    LCD_LINES Question Help ?

    Thank you for reading

    Quick Question to confirm...

    "Set number of lines on LCD
    DEFINE LCD_LINES 2 "

    Does the above mean define 2 line display

    or
  22. Replies
    7
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    2,933

    Re: Digital output (RA5) on 16f884

    Very good advice.... My problem is disciplining myself to carry it out.

    Maybe I need slow down a bit :-)

    BR
    Andy
  23. Replies
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    2,282

    Re: Fuses issue on 16f884.... Locked out ??

    I may just try that :-)

    BR
    Andy
  24. Replies
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    2,933

    Re: Digital output (RA5) on 16f884

    Thanks both for help..... Missing the obvious, for some reason I copied and pasted previous code, but left TRISB as 15.

    Changed to 255 and all works now......:biggrin:

    Thank you again
  25. Replies
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    2,933

    Re: Digital output (RA5) on 16f884

    Hi All

    Looked at this a little bit further..... I now believe it is RB5/AN13/T1G Causing me the issue.

    Maybe the T1G Timer ??

    How do I disable this and make the port just a DI

    Many thanks
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