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  • Author Author: billabott
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Beginning Picaxe

billabott

Waaat?  You never heard of it before?  If so, please do take the opportunity to educate yourself at www.picaxe.com.

 

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As I stated elsewhere:

My little experiment is a success!   I doubled the value of the resistor going to ground on that voltage divider on the the serial in of the Picaxe to prevent going over the maximum current sourcing limit (provides positive current) on the 74LS04 output pin driving that serial in signal.  It worked flawlessly for the small program file I loaded. No surprise on what the code does - it blinks a LED on and off in an endless loop.


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- EOL-

system functional check  11am 09/13/2019

  • in reply to shabaz

    The reference in the picture doesn't seem to work any more, so Silicon Labs must have revised their site.

     

    The FTDI chips have the option to invert the TX and RX pins, but so far I can't see that you can do it in the CP2102.

     

    There are some other great posts about using Nokia programming leads.

    http://www.kwartzlab.ca/2010/04/reverse-engineering-cheap-ardu/

    http://forum.aztronics.com.au/viewtopic.php?f=31&t=250

     

    There is a warning on the Prolific site about Chinese knock-offs.

    There are also some comparisons when they taut these as USB to Serial ... they forget to add the level converter chip.

    There are also some reports that you can't uses the software to invert the Tx/Rx pins, so you may still require an inverter.

     

    We have been using the FT230-XS in our projects, which does allow the TX and RX pins to be inverted and will usually supply enough power to program the Picaxe from the USB.

     

    You might enjoy the Picaxe 14M2. It does much the same only it saves on chip space by adding the code for 2 of the tunes at compile time (if you uses them).

     

    Mark

  • "it blinks a LED on and off in an endless loop"

    I keep thinking one of these days a "hello world" flashing red LED will really be a blinking Warning, and I just won't realise it! image