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  1. fernando_g

    Hippy status, rev 2.0

    It is almost a year (June 11), that Hippy last posted here. An explanation was provided by RevEd that, due to the pandemic, he had been placed in “administrative furlough”, or words in that extent. Now that it appears that the whole World is getting back on their feet, is Hippy coming back...
  2. fernando_g

    AXE033 with I2C input, can't accept ASCII variables?

    I have had an AXE033 for several years to debug my projects, but I have been out of practice related to operating it with I2C that somehow I can't make it work. For instance, if I use the serial input to display 8 bytes separated by a space, It compiles and works just dandy: Serout B.5,N2400...
  3. fernando_g

    Downloading programs on a 3.3V powered Picaxe

    Simple question; I have a Picaxe project which runs on 3.3V, but requires software updates. I originally programmed the Picaxe in a test socket running at 5V. I've always used the AXE027 cable, which in my understanding will output 5V TTL levels. Will the Picaxe's serial input be damaged if I...
  4. fernando_g

    I2C pullup resistor values

    A painful learning experience that I would like to share with others. For a 5 volt supply and running at 100khz, the standard 10k resistors do the job quite nicely. But on a project which had up to 8 slaveI2C devices which had to be queried constantly I found that I required to run the bus at...
  5. fernando_g

    Light Chaser; Preloading EEPROM data

    I am planning to build a light chaser, on which the strings of LEDs is lit up with sequences like the following example: 0000 0000 1000 0000 0100 0000 0010 0000 0001 0000 0000 1000 0000 0100 0000 0010 0000 0001 then a new sequence follows: 1100 0000 0110 0000 0011 0000 0001 1000 0000 1100 0000...
  6. fernando_g

    Investigating low power consumption modes.

    I will be working on a project running from supercaps in the near future, and was looking at ways to minimize current consumption, for obvious reasons. I will write about this project later. Right now, I investigated the 14M2's current draw vs frequency, and in the sleep and disablebod modes. I...
  7. fernando_g

    Porting from original 20M software to a 20X or 20M2

    Looong time, I've posted in this forum. My PICAXE basic is somewhat rusted, so this may be a very simple question to some of you. What is required to port original 20M software to a modern 20X or 20M2? I've an old project which I accidentally damaged the 20M. I already have a 20X which could...
  8. fernando_g

    OT: World's largest battery in Australia

    I would love to hear comments from our down under friends about the following news: I had read a Silicon Chip editorial page where it had been complained the SA's government had relied way too much on renewables...
  9. fernando_g

    the dreaded W10 update has happened!

    And Paint is gone! I know, I we have Paint 3D. Call me a Luddite, but I liked Paint. Why could they not both coexist?
  10. fernando_g

    Programming a 3V3-powered PICAXE with an AXE027

    I am planning to build a Picaxe system which will be powered from a 3V3 supply. But like all my projects, I would like to maintain software upgrade capabilities. However, the AXE027 is a 5V-only device. I was planning to include a resistive divider for Serial In pin, and a Mosfet level...
  11. fernando_g

    Der sinnlose Zähler: a Picaxe powered, Dekatron and Nixie display, do-nothing box

    How to marry ancient display technology, namely Dekatrons, Nixies and neon lamps, to a Picaxe? When I was young, I built several idiot boxes employing neon lamps. Time to marry modern technology with ancient display technology
  12. fernando_g

    Picaxe temperature grade

    What is the Picaxe's temperature grade? Commercial 0 to +70C? I am planning to have an application that it is continuously at +60C. I know that I have margin, but had hoped to at least have industrial grade range.
  13. fernando_g

    Picaxe controlled Dekatron, Nixie and Neon lamps.

    The ultimate idiot box, what can I say. Chirping noise added for good measure. Its total nonsense and complete uselessness makes it fascinating to watch. The Picaxe generates random sequences which, via the proper interface circuits, drive the Dekatron, Nixie and neon lamps...
  14. fernando_g

    Finished: accurate powerline frequency meter

    A few weeks back, I opened up the following thread, asking how to measure powerline frequencies with a resolution of two decimals. This may seem fairly straightforward, and there are many ways to approach this...
  15. fernando_g

    28X2 odd but brilliant behavior.

    I was playing with a 28X2 had to run quite fast, and therefore I decided to use an external 8Mhz resonator and use the setfreq EM32 function. Upon debugging the circuit, I noticed that the code was running much slower. Long story short, I had failed to solder the resonator! Soldering it and...
  16. fernando_g

    Accurate powerline frequency meter.

    My problem: measure powerline frequency accurate to 2 decimals. If the frequency is 59.99 Hz, I want to know that much, and not round it off to 60 Hz. What I know: I will require an accurate and stable master timebase. No worries, mate. I have a +/- 1 ppm TCXO Straightforward but not very...
  17. fernando_g

    One of those "DUH!" moments.

    During the longest of times, on any program on which I have used a RTC clock, I have used a routine similar as follows to update the time on the RTC from the serial terminal: SERRXD mins, hours 'receive data in binary ' convert the binary to BCD hinibble = mins/10 *16 lonibble = mins//10...
  18. fernando_g

    FTDI breakout board

    This idea evolved from the fact that I've projects which its external wall-wart power supply already provides regulated 5v. To prevent connecting a 12v wall-wart into those projects, instead of the 2.5 or 2.1 mm circular receptacle, I use a mini USB instead. Avoids damage. In many of those...
  19. fernando_g

    Only a single simultaneous PWM value possible?

    I've noticed that if I setup a PWM value on a port, for instance C1: pwmout pwmdiv4, C.1, 199, 600 and immediately afterwards I follow with another command in a different port, same frequency but different % like so: pwmout pwmdiv4, C.2, 199, 550 Then, both ports assume the last PWM value...
  20. fernando_g

    Non-Collapsing byte display

    When I upgraded to PE6.08.10, I noticed something different in the code explorer section; Previously, all variables would be shown collapsed like so, and if one wanted to review individual bits, one would click the + sign. That would be the default. But now, the default when I open the...