​ ​ ​ Search Results - PICAXE Forum

Search:

Type: Posts; User: srnet

Page 1 of 20 1 2 3 4

Search: Search took 0.13 seconds.

  1. Replies
    43
    Views
    1,020

    Well given the intended market for PICAXE...

    Well given the intended market for PICAXE devices, I would suggest that for someone like Rev Ed to adopt the HC-12, the lack of CRC problem needs to be solved internally in the HC-12 or with extra...
  2. You could try the PICAXE manuals or a Google...

    You could try the PICAXE manuals or a Google search on 'background receive in Picaxe' will find some stuff.
  3. Replies
    43
    Views
    1,020

    Especially if the packets are accepted with...

    Especially if the packets are accepted with errors.

    Can someone confirm if the HC-12 implements CRC checking on packets or not ?
  4. Replies
    6
    Views
    210

    Write endurance is specified as 100,000 writes in...

    Write endurance is specified as 100,000 writes in the data sheet.

    Not sure there is any ambiguity here, its always been 100,000 as far as I am aware.

    Some people may have tested chips and got...
  5. The MCLR\VPP pin, if it had a diode (to VCC) you...

    The MCLR\VPP pin, if it had a diode (to VCC) you would not be able to raise it to the programing voltage, which can be 12V.
  6. Yes, the protection diodes on the pins means the...

    Yes, the protection diodes on the pins means the pin acts as a ground connection when PICAXE power is removed.

    There is one pin without the diodes, but thats an input.
  7. Thread: DS18B20 Heads Up

    by srnet
    Replies
    18
    Views
    710

    Well, one possibility is that moisture ingress is...

    Well, one possibility is that moisture ingress is the problem.

    In Space its a vacuum and there is no water vapour around to freeze\thaw.
  8. Thread: PCB Headers

    by srnet
    Replies
    5
    Views
    287

    I would expect pin headers as thin as 0.1mm to be...

    I would expect pin headers as thin as 0.1mm to be very floppy, not a lot you can do about it really at that small size.
  9. Thread: DS18B20 Heads Up

    by srnet
    Replies
    18
    Views
    710

    So your sensor had a very limited range of...

    So your sensor had a very limited range of thermal cycling, -2C to +3C, a cyling range of 5C, and they failed in 7 or 8 months.

    The $50SAT sensor went through -30C to +30C, a cycling range of...
  10. Thread: DS18B20 Heads Up

    by srnet
    Replies
    18
    Views
    710

    I would suggest that there is not a problem with...

    I would suggest that there is not a problem with geniune DS18B20s being exposed to freeze thaw cycles.

    The DS18B20 on $50SAT went from -30C to +30C and back down to -30C on every orbit. There...
  11. Thread: DS18B20 Heads Up

    by srnet
    Replies
    18
    Views
    710

    What was the range of temperatures it went...

    What was the range of temperatures it went through, low to high and how many times did this freeze thaw occur before failure ?
  12. Thread: Genie circuits

    by srnet
    Replies
    50
    Views
    2,172

    The AXE027 is good example of a simple product...

    The AXE027 is good example of a simple product done well.

    Its very well supported by Rev Ed who are always willing to help users getting it going or dealing with problems.

    The AXE027 is very...
  13. Replies
    5
    Views
    233

    They are listed in the manuals. Look for 'Chip...

    They are listed in the manuals.

    Look for 'Chip Labels'
  14. Replies
    25
    Views
    1,141

    So please answer the basic question; how exactly...

    So please answer the basic question; how exactly would a 'protected bootloader' be implemented ?

    Are you sure it is possible, or do you just hope it is ?
  15. Replies
    25
    Views
    1,141

    So how would you prevent a suitable bit of...

    So how would you prevent a suitable bit of assembler reading and printing out the contents of the chip ?

    Even assuming it were possible, there must be a good reason why its not been done after all...
  16. Replies
    47
    Views
    2,062

    Not so, the 'BBC Micro cosmetic defects' were...

    Not so, the 'BBC Micro cosmetic defects' were available for free.

    Sure I have one in the attic, somewhere, maybe not.
  17. Replies
    213
    Views
    22,069

    As well as ignoring the advice in the link...

    As well as ignoring the advice in the link mentioned in #181, do not, even for a shortwhile, operate modules of this type withouts an antenna.
  18. Replies
    213
    Views
    22,069

    I hope people realise that those are the results...

    I hope people realise that those are the results for a particular reciever, of no relavence to antennas in general, and could if followed damage some radio modules.

    For instance a half wave or...
  19. Replies
    35
    Views
    1,498

    High power commercial systems have been around...

    High power commercial systems have been around for a while, you can buy them, not cheap.

    Most readers of this forum would be using license exempt modules at UHF, for which the power limit is 10mW.
  20. Replies
    35
    Views
    1,498

    I would start coding from the situation where the...

    I would start coding from the situation where the stations have all just been powered on and are not in sync.

    What do you have to do from this situation to get them in sync in the first place ? ...
  21. Replies
    2
    Views
    263

    I have not tried the RFM69HW (Semtech 1231H RFIC)...

    I have not tried the RFM69HW (Semtech 1231H RFIC) but looking at the datasheet it has the same sensitivity as the RFM22B (Silicon Labs Si4432), which is a device I am familiar with and have range...
  22. Thread: MSSP modules

    by srnet
    Replies
    8
    Views
    375

    Although the comparisons I did were for an SPI...

    Although the comparisons I did were for an SPI memory, the same principals should work for any SPI device. The PEEKSFR and POKESFR PICAXE commands are after all the equivalent of what the PIC is...
  23. Thread: MSSP modules

    by srnet
    Replies
    8
    Views
    375

    The simple answer to using SPI and I2C may be...

    The simple answer to using SPI and I2C may be here;

    http://www.picaxeforum.co.uk/showthread.php?25837-High-Altitude-Balloon-Tracker-and-using-the-SST25VF032B-4Mbyte-Flash-memory

    "The PEEKSFR...
  24. Replies
    213
    Views
    22,069

    Well, I would not be wanting to run any UHF comms...

    Well, I would not be wanting to run any UHF comms without error checking.

    And implementing you own seems to be a significant extra complication.
  25. Replies
    213
    Views
    22,069

    I would imagine that the actual over air packets...

    I would imagine that the actual over air packets are themselves CRC checked, in which case any apparent bit errors would be down to firmware issues between the RF IC and the serial interface.

    And...
Results 1 to 25 of 500
Page 1 of 20 1 2 3 4