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  1. D

    How to connect this strain gauge?

    What A/D are you going to use to read the output of AD620 ? In other words what is the desired output range you want out of the AD620 ? Will you be feeding the AD620 output to an A/D, if so whats is its input range allowed ? Regards, Dana.
  2. D

    How to connect this strain gauge?

    A good starting point would be Fig 38 in : https://www.analog.com/media/en/technical-documentation/data-sheets/AD620.pdf Regards, Dana.
  3. D

    How to connect this strain gauge?

    Its a full bridge strain gauge, so power goes to Red and Black, Green and White to A/D or IA input. The lower R valued ones may need a R in series with power connection to limit current, which creates a CM Voltage so A/D has to be differential input, or use IA. Does information describe current...
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    Choosing the right current sensing resistor.

    Is that a L6201 ? That datasheet does not show any real info about how to manage that Rsense value..... Maybe post directly at ST or contact their FAE to get an answer ? Regards, Dana.
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    Downloading programs from Microcontrollers

    The best analogy to the task you have is consider counting the number of grains of sand on a beach. Can be done, thru a huge resource like get 100,000 low cost workers, give each one a cup of sand, and ask them to count. In your case doubly worse, because one has to understand the external...
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    Has anyone got this universal analog output circuit to work?

    Circuit looks OK. Here I change Rloop from 10 ohms to 1K ohm, two case, V4 = 0 and V4 =5 In First case, V4 = 0, 4 mA stays well regulated over large Rloop change from 10 to 1000 ohms. Second case V4 = 5V, at Rloop ~= 380 ohms the 20 mA falls out of regulation. Note both cases Vsupply...
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    Downloading programs from Microcontrollers

    Google "8085 disassembler" for tools to disassemble the code. Regards, Dana.
  8. D

    Coils bypassing switch

    For future work here is a manual on how to use Traics, SCRs, trigger diodes : https://archive.org/search?query=scr+manual Regards, Dana.
  9. D

    Will cleaning help?

    WD40 Contact cleaner, not the spray general lubricant...... Regards, Dana.
  10. D

    Not sure where to put this question

    4) Basically you want a bypass cap to pass all the noise to ground, to remove it from the supply rails. ESR (equivalent series resistance) is essentially a measure of its ability to look, in AC case, noise, like a short to ground for that noise and transients. ESR is made up of several...
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    help with IR2110 chips

    These might help (calculations in both) : https://toshiba.semicon-storage.com/info/application_note_en_20180726_AKX00068.pdf?did=59460 https://www.ti.com/lit/ml/slua618a/slua618a.pdf?ts=1692194181969 Regards, Dana.
  12. D

    Coils bypassing switch

    Schematic ? Pic of prototype se we can see layout and wiring..... Regards, Dana.
  13. D

    Not sure where to put this question

    Some thoughts : 1) What part number you using for diodes ? Hopefully they are Fast/Ultra Fast types. 2) Is there a ground rail in system where all key grounds are tied to ? It looks like you have a sort of distributed grounds. Goal, especially in systems like this, is all grounds meet at a...
  14. D

    Speakers and Bass Frequencies

    If a signal arriving at brain is not a linear replication of the source, that to me is corruption. Unless perception is capable of undoing the non linear corruption and supplying a resurrected signal to the brain. If the signal, such as one with additional harmonics due to non linearity, arrives...
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    help with IR2110 chips

    Here is a print file, pdf, of the web page, attached : And other ap notes : https://web.mit.edu/6.131/www/document/float_drive.pdf https://www.infineon.com/cms/en/product/power/gate-driver-ics/ir2110/ Regards, Dana.
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    Not sure where to put this question

    Do you have a DSO you can capture the transient with, such that you can see if its power rail related, ground bounce, or coupling ? Schematic of what you are doing, and a pic of prototype and wiring you are working with .... Regards, Dana
  17. D

    Speakers and Bass Frequencies

    If the signal path is non linear then that signal path has, and does, corrupt the origin source. End of story. Yes everything is an illusion, myriads of findings various species have different sensing capabilities than others.....even their processing engines post sensor production, in species...
  18. D

    LED Supply Mounting

    Power supply part number ?
  19. D

    30 yr old blower quit.

    Take you ohmmeter, one probe on one of the plug blades, and walk down the wire path all the way to the motor. Dop same for other plug blade. That should tell you where break is. Sanding contacts leaves behind particles that can compromise switch contact effectiveness. Contact cleaner or 90%...
  20. D

    Speakers and Bass Frequencies

    Human ear produces tones when none existed in source, even if not overdriven, the "missing fundamental" : https://www.britannica.com/science/sound-physics/The-ear-as-spectrum-analyzer Regards, Dana.
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