Recent content by wapo54001

  1. W

    How do we use an IR remote control & detect multiple button-presses?

    Now very late to the game, but I had this problem when I was designing an IR control system for an audio preamp. I did not want the volume control to continue to increase/decrease after I let go of the up/down button on the remote because of commands left in the buffer. The way I solved it was...
  2. W

    Math is not my thing; help, please?!

    The LM340AZ seems to have a maximum input voltage of 35V which gives me a 5V cushion and, as has been noted, the current is typically 4-5mA baseline with very infrequent blips of 24mA for 10ms decreasing toward baseline over 90ms. A switching regulator has drawbacks here -- potentially putting...
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    Math is not my thing; help, please?!

    @hippy, many thanks for the help you provided on this project -- it's done, the hardware works, I'm happy.
  4. W

    Is there a known problem with the AXE027 drivers and Windows 11?

    Who is responsible for the PID and who is responsible for it still not being listed? Does a proper PID solve all issues? If so, who is responsible for it?
  5. W

    What happens to readADC value when input is slightly above Picaxe supply?

    If the Picaxe supply is exactly 5.0V and a voltage divider delivers 5.2V to a Picaxe pin, what is the readADC10 value? Does it overflow?
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    How to keep changing data on a single line in Terminal

    I need the end result to be in the 0-1023 range and the above doesn't give me that, I think there's a division step missing? Does this code below do the same thing or am I missing something? (Resulting number seems good, but . . . ) Percent_Value = Percent_Value * 32 + 32768 / 64 MAX 970 It...
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    How to keep changing data on a single line in Terminal

    @hippy, I'm a pretty happy camper. Using the terminal code you suggested I was finally able to see the numbers I needed to see in order to tweak the code you provided to give me the numbers I need. Your use of the "**" simplified everything and was able to just use Word values for all the...
  8. W

    How to keep changing data on a single line in Terminal

    hippy, that works really well, thanks! One thing, I had to add a PAUSE 500 at the end of the series of SerTxd commands because every five or so iterations of the loop the entire first line would be blank except for the last digit of the number. No idea why, but the PAUSE solved the problem and...
  9. W

    How to keep changing data on a single line in Terminal

    I am running a loop in a program and three of the lines in the loop are SERTXD commands sending data to the terminal. I would like those data items to remain in a single location on the screen, one data item per line, in three lines on the terminal display rather than scrolling. I think that I...
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    Math is not my thing; help, please?!

    Well, I confess that I have no training in electronics so it's all practical assumptions on my part. Please point out any flaws in my reasoning below. Since the relay is the latching variety, using a FET would be quite complicated and, I hope, unnecessary. The relay is 5V 20mA, drawing current...
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    Math is not my thing; help, please?!

    O.M.G. Well, I have a much better chance of understanding this than I would have had to create it myself but it's still a challenge! I'm already beginning to follow but need to study it more. It's the overflow issue that stopped me, I need to look at this for a while to understand. I...
  12. W

    Math is not my thing; help, please?!

    I am designing a board for audio line-level (preamp) equipment that is intended to prevent large startup and shutdown pulses from reaching the power amp, and I’m trying to make it fairly universal by compensating for power supply voltages of 10~30 volts and permitting user selected startup...
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    I want to detect the presence of DC while ignoring audio signal AC

    Top-end class-D offers some of the cleanest amplification out there now. Still, many audiophiles prefer the audible 2nd harmonic distortion introduced by tubes (valves). I myself use a valve preamp with user-adjustable harmonic distortion -- selectable from mostly 2nd to minimal to mostly 3rd --...
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    I want to detect the presence of DC while ignoring audio signal AC

    I would say instead, "the more expensive the amplifier, probably the greater voltage/current capacity and thus the greater likelihood of speaker demise in the event of amplifier failure." In the days of class AB amps you could guess the output power of an amplifier by weighing it on a scale. Not...
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