Search:

Type: Posts; User: Andy2No

Page 1 of 3 1 2 3

Search: Search took 0.03 seconds.

  1. Ok. Thanks, Nick.

    Ok. Thanks, Nick.
  2. Ah. Okay. Thanks, Ray and Nick. Yes, I...

    Ah. Okay. Thanks, Ray and Nick.

    Yes, I realised the resistors aren't a potential divider. I wasn't sure how much of a voltage drop there'd be across the 22k resistor due to the input current...
  3. I see. So I can't make PICAXE boards that are...

    I see. So I can't make PICAXE boards that are compatible with both types of cable - the old serial one and the new USB one?

    I still can't figure out how to use that applet. It just keeps giving...
  4. Erm... "Yes, it's not needed", or "Yes, having it...

    Erm... "Yes, it's not needed", or "Yes, having it there would create a problem"?
  5. Are the 22k/10k resistors still needed/used if...

    Are the 22k/10k resistors still needed/used if the AXE027 PICAXE USB Download Cable is used instead of the serial cable?

    As the levels are presumably already 5V, I assume there's no need for them,...
  6. Replies
    26
    Views
    3,138

    Thanks, hippy. I'd seen references to the...

    Thanks, hippy. I'd seen references to the AXE033, but I wasn't sure if those were a different board. It makes sense, because the 18M2 is relatively new, and no earlier 18 pin chip has an input on...
  7. Replies
    17
    Views
    1,971

    That page indicates that the 18M2 and 18M2+ are...

    That page indicates that the 18M2 and 18M2+ are both based on the PIC 16(L)F1847. That doesn't appear to explain the differences in the spec that Ray pointed out.

    A table with all the details...
  8. Replies
    17
    Views
    1,971

    So it does. Which makes me wonder, is the 18M2+...

    So it does. Which makes me wonder, is the 18M2+ based on a PIC that's available as just a PIC, like the earlier PICAXEs, or is the underlying silicon only available as a PICAXE?

    I know the...
  9. Replies
    26
    Views
    3,138

    But it's the same AXE132 board included in each...

    But it's the same AXE132 board included in each one, I take it? I've been calling the board AXE133, because that's what I ordered, but I guess I should be calling it AXE132.
  10. Replies
    26
    Views
    3,138

    Resistors on the LCD panel PCB makes sense. In...

    Resistors on the LCD panel PCB makes sense. In that case, you could also work out what size resistor to add in series with the ones already there, to make it compatible with 5V, and fit that...
  11. Replies
    17
    Views
    1,971

    Thanks, Ray and Technical, The 18M2+ is the...

    Thanks, Ray and Technical,

    The 18M2+ is the only M2+ part that www.picaxe.com/docs/picaxe18m2.pdf mentions, as far as I can see, which is a little confusing.

    So can you confiirm that the M2 and...
  12. Replies
    17
    Views
    1,971

    Thanks, Ray. I'm glad you survived your trip....

    Thanks, Ray.

    I'm glad you survived your trip.

    I'd actually read that document too, but my memory is rebelling against me trying to stuff too much into it in a short space of time. It looks...
  13. Replies
    26
    Views
    3,138

    FWIW, I bought a 4 line x 16 character black text...

    FWIW, I bought a 4 line x 16 character black text on green LCD, with a backlight, and I've substituted that for the blue 2 line x 16 one. The backlight was very faint with the circuit I'd made for...
  14. Replies
    17
    Views
    1,971

    M2 vs M2+ differences

    I've looked for this a few times, but I don't see anything that says what the differences are between the M2+ versions and the M2 versions, e.g. in what ways do 08M2 and 08M2+ or 18M2 and 18M2+...
  15. Replies
    26
    Views
    3,138

    50 Ohms, if the voltage across the LED is 2.5V. ...

    50 Ohms, if the voltage across the LED is 2.5V. Is there a prize? :)

    I suspect if you limited the voltage to 2.5V the LED wouldn't light, because there's a current limiter inside the controller -...
  16. Yes, I've been laboriously rewriting my 08M test...

    Yes, I've been laboriously rewriting my 08M test program to add a long pause between each byte sent, and it does work with the 18M2 running at 4MHz after all. I'm not sure how useful that would be...
  17. I tried to get it to run at 4MHz because PICAXE...

    I tried to get it to run at 4MHz because PICAXE multitasking only runs at 4MHz.

    The 18M2 just sits there most of the time, waiting for the next byte from serin. I can't see any other way of...
  18. Replies
    26
    Views
    3,138

    In the Winstar WH1602A series data sheet, there's...

    In the Winstar WH1602A series data sheet, there's a cryptic note on pin 15 that says "A/Vee 4.2V for LED (RA=0 Ohms) / Negative voltage output".

    The negative voltage output seems to refer to...
  19. I've just spent hours trying to get the BASIC...

    I've just spent hours trying to get the BASIC "firmware" on the 18M2 on my new AXE133 LCD display to run at 4MHz, instead of the 16MHz it switches to after initialising the display. I'm sending a...
  20. Replies
    26
    Views
    3,138

    Well, I got mine working using the undocumented...

    Well, I got mine working using the undocumented circuit those unused pads were intended for.

    FWIW, I used a TIP127 PNP Darlington, with a 4k7 base resistor (10k or maybe even 22k should work too),...
  21. Replies
    26
    Views
    3,138

    I guess you could add a bit to the firmware to...

    I guess you could add a bit to the firmware to give PWM control of the backlight, for different brightness levels. I don't like flickering though (I hate fluorescents), so I probably won't bother. ...
  22. Replies
    26
    Views
    3,138

    I've just been looking into this. I did a search...

    I've just been looking into this. I did a search to see if there's any more knowledge on the subject before I start soldering, but found this question instead :) It seems odd that it was just asked...
  23. Okay. I get it. The numbers are what you pasted...

    Okay. I get it. The numbers are what you pasted into the File->Import box, in that applet.

    Here it is again with the 5V changed to 3.3V for Vdd (purely using trial and error)

    11368



    $ 1...
  24. That's impressive, Ray, though i've no idea what...

    That's impressive, Ray, though i've no idea what those numbers mean :)

    However, Armp's 18k resistor was chosen for Vdd = 3.3V, and i think 12-15V RS232. Also, the second Schottky diode was my...
  25. A voltage divider was what Armp had in mind, I...

    A voltage divider was what Armp had in mind, I think, MPep. His circuit was designed for programming a PICAXE fed from 3.3V and he was trying to make sure the voltage fed to it stayed inside...
Results 1 to 25 of 69
Page 1 of 3 1 2 3