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  1. T

    Multiple readadc10 commands in a row

    I used a very similar approach in my Grid Frequency Meter project, listed somewhere on this forum. I alternately read Voltage and frequency. For a close approximation it worked really well.
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    Optocoupler for PC PSU's 5V line to Picaxe input pin?

    Taking the minimal component approach... A self oscillating piezo connected with the +ve to 5Vsb and the -ve to 5V would sound when the PC was off but plugged in. The drain from the "off" 5V likely to pass a mA or two, enough to sound the piezo.
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    Optocoupler for PC PSU's 5V line to Picaxe input pin?

    Why not get a "Smart" power strip that turns off the power to all sockets when the "monitored" socket draws no current? My vote goes to the KB814.
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    HV series PIC

    I despise MpLabX. With a passion. Never got any single program to compile! That's how I got started with PicAxe, it works. Should add that I've usually managed to figure things out in GCB on the very, very rare occasions when it hasn't just worked.
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    Does a 14M2 deliver more current than an 08M2?

    Glad you sorted it finally. I might have tried putting a 14M2's top eight pins in the 08M2's place, then trying to perform the same function with that. I've had to do "reality" checks like this way to often. It is the Sherlock Holmes method of fault finding, first eliminate the possible causes...
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    Serial LCD display for PIC projects ?

    In the few hours I played with Positron, I had the LED flash example running in a few minutes. Persuading it [and Windows] to correctly invoke my programmer so that I could see whether the device had, or had not, been programmed correctly was a long and drawn out affair. After I had done that I...
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    Serial LCD display for PIC projects ?

    Regarding 'Sleep' on GCB. I wrote a clock program that is for a battery powered unit. I periodically switch the CPU frequency to the lowest level possible, do a few loops of 'NOP' [no operation in .asm] to give some approximate timing then return the CPU back to it's original speed [32MHz]...
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    Serial LCD display for PIC projects ?

    It looks as though Proton Basic has been made available as a legacy download at no charge [could be wrong, but it did work for the few hours I ran it]. I don't know how recent the device coverage is though. Positron covers many devices, more than mikroBasic certainly. GCB also covers many, many...
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    Serial LCD display for PIC projects ?

    I use GCB. I don't care for the new or old IDE so use the compilers in an external editor. GCB is fabulous though documentation can be terse or nonexistent. The forum is mostly very helpful. I have managed to figure most things out and I generally post a 'guide' if it took me a while to try to...
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    Processing time

    I had thought that most PICs (including the 16F1829 'range' PicAxe M2 devices are based on) had a 4 Clock Instruction Cycle? Giving a 32MHz clock operation device an Instruction Cycle of 32/4 = 8MHz. I've been working with timers recently and that is what I based my pre-load value...
  11. T

    Temperature + Humidity Measurement with DHT11 Sensor and 08M2

    Ingenious! Very creative. I'm really impressed.
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    This generic black PCF8574 I2C LCD backpack uses pin 11 to control the backlight

    Possibly it is a "digital transistor"? With an integral base resistor.
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    Measuring the power of sine and square waves.

    Big chunky box you can just see under the desk. Try "AVS7000 power conditioner" as your search term. Turned up for me as AVS7000, though I did use Google Images to help...
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    Measuring the power of sine and square waves.

    Interestingly, under the "desk" is an AVS7000 mains supply conditioner. It could be driving the coils directly from (filtered) AC mains?
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    Measuring the power of sine and square waves.

    As I alluded to in post 14, your power (current?) meters are probably accurate in showing a lower current at higher frequencies. Using another method, whether PicAxe or something else will likely show similar results.
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    Measuring the power of sine and square waves.

    PVDD_AB and PVDD_CD are the inputs for the power for the (presumably) bridged outputs. They are shown as separated on the circuit diagram so could possibly be isolated.
  17. T

    Measuring the power of sine and square waves.

    Measure the supply voltage and current at the point it supplies each of the channels you intend to take a reading from?
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    28X2 to drive a Rev-Ed 4x20 OLED to tell the time with a DS3231

    TABLE 0, ($3,$3,$2,$2,$8,$0,$C,$0,$1,$0,$2,$0,$6) '(4Bit)(2line/5x8)(Display On)(Clear Display)(Return Home)(Entry Mode Set) That looks like the command code sequence required to initialise the display. It sends the commands in the correct order for those stated underneath. The codes are...
  19. T

    Measuring the power of sine and square waves.

    For the accuracy you need, why not measure the current and voltage at the D.C. supply feed to the amplifier supply input? If you compared that to the readings given at the output with a 60 Hertz signal you would have some idea of the voltage difference between input and output and then use that...
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    Measuring the power of sine and square waves.

    In theory... You could set an oscillator to (say) 20Hz sine wave, measure the voltage across a resistor connected to the output terminals, use that to calculate the power. Change the frequency, repeat. Average the calculated power to give an overall output? Using Mike's suggestion, you would...
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