Recent content by AllyCat

Hi, The "intended" configuration is to write a character in the right-most column and then to "auto- (left) scroll" (the display) so that the text still reads in a left-right direction. However, the controller actually has two flags, variously named "I/D" , "S" and "S/D" , sometimes with...

Hi, So what is your "requirements specification" now? I have no intention of reading through 156 previous posts to find out. :( Cheers, Alan.

Hi, Ah, a picture is worth 1000 words; I wouldn't describe that as "mirrored" because each character is still displayed correctly. I would describe the sequence of the (ASCII) characters on the display being "reversed" and there is another feature that the first four characters of each line ("...

Hi, The Microchip "recommendation" is that the source resistance should be a maximum of 10k, because the input to the ADC is a Sample-and-Hold circuit which takes a (small) "gulp" of current that may cause some voltage drop and reduce the overall accuracy or linearity (not the resolution) of...

Hi, It may help if you use the indenting "correctly", i.e. a constant number of spaces (or TABs) between IF ... ENDIF and DO ... LOOP , etc.. sections. Also, there are two forms of the IF ... command, a single-line IF .... THEN {GOTO} <label> and the IF ... THEN : <NEWLINE> any number of...

Hi, AFAIK, PICaxe doesn't support Nested Interrupts; There is only one level of interrupts which is not (re-)enabled until a RETURN (from Interrupt) is executed. Assuming you are using "legal" subroutines inside the Interrupt routine (i.e. they will terminate with a RETURN and not a GOTO)...

Hi, Yes, nearly all my applications use the FVR because all of my projects are designed to operate directly from "unregulated" batteries, i.e. one Lithium or a few Alkaline AA cells in series. In particular, I don't use 7805 style regulators because their quiescent current (alone) is several...

Hi, It shouldn't be the differences between the sensors and they do all seem to eventually converge to the same point/temperature. The indeterminate position on the radiator is why I would mount the sensor on the pipe (which should also give a more accurate and faster indication of the water...

Hi, The "Design Guide" gives a "Typical Application Circuit" diagram, but I don't know how close that is to the available Voice Recorder Modules. One of the ebay sellers shows a circuit diagram, but the detail (resolution) is very poor and it shows 7 buttons whilst the modules appear to have...

Hi, There are only two other threads on the forum concerning this Sound Module and neither really comes to any conclusion, so I've been looking at the Data Sheet and can partly answer my own question above. Firstly, it's the "ISD1700 Design Guide" which is needed, not just the Data Sheet, but...

Hi, Yes, as I suspected, you've put the LOOP in the wrong place, it should be at the end of the main: program, before the rst: subroutine. At the moment the main program flow is "falling into" the subroutine and then doesn't have anywhere to RETURN. It looks as if there must an "extra" sound...

Hi, I don't believe PICaxe supports the parasitic powering mode, but you could put a lowish valued "safety" resistor in series with the supply pin. Also, I think the parasitic mode actually requires drive pulses of a much higher current than for normal operation. If my calculation in #12 is...

Hi, The PIC(axe) is basically a microcontroller (not a "computer"), but with a large number of "bonus" additional internal hardware "features" such as R-C oscillator(s), Timer/Counters, ADC/DAC, Voltage Reference, PWM, Comparator(s), Temperature Sensor, etc.. However, like most "Jack of All...

Hi, So you are "complaining" about an "error" of 0.13 / 10.4 = 1.25% and your (measured) divider error alone is 1.990 / 18.01 = 0.11049 , which is about 0.46% below the "expected" ratio (2 / 18). So we're looking for a potential "error" of 0.8%. You haven't shown your calculation but* the...

Hi, So are you saying that you "expect" a value of 10.07 (or 10.47) volts? That's an error of 2% which might be a little worse than "normal" but is not particularly unexpected. Firstly, the "nominal" FVR voltage is 2.048 volts (i.e around 2.5% higher than you assumed) , but the Microchip data...