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Recent content by wwfeldman

  1. W

    SAR using PSoC 5LP

    i thought i posted it i'll be able to post it monday
  2. W

    SAR using PSoC 5LP

    that's the problem. i used the second entry i used two separate KIt059s i tried the sigma delta a to d - same result, no data after about 2.5 V the sigma delta has an entry supposedly from Vss to 6*Vref, where Vref = 1.??V, so it tops out at 6V same result - once the input hits about 2.5 V, the...
  3. W

    SAR using PSoC 5LP

    there is a 500 ms delay after setting the D to A, >> 3 us, so the analog ouptu should be settled Vout_white is connected to P0(0), OpAmp2.Vout Vin_green is connected to P3(3), OpAmp3.Vplus the SAR is software triggered and has a "wait until complete" loop thereafter so the sample rate likely...
  4. W

    SAR using PSoC 5LP

    SAT is a typo - should be SAR. I am aware that creator auto assigns pins. i'm thinking the issue is in the SAR - since the opamps are RR as you said, and that the output of the D to A matches the meter. thank you
  5. W

    SAR using PSoC 5LP

    I am using VDAC8 and ADC_SAR to convert analog to digital and back, in KIT059, PSoC5LP. A for loop assigns the digital value to the DtoA, whose output is buffered by an op amp follower. The output is fed back into another buffering opamp and then to an A to D converter, ADC_SAR. the program...
  6. W

    Lightning rods...

    lightning rods are the tallest conductor in the area. they attract lightning because they provide a lower resistance/impedance to ground the net effect is to protect the structures neary
  7. W

    Pulse power rating of resistor?

    about 30 years ago, i had a document from Dale about pulse handling capability of resistors. it specified the pulse energy handling capability of various resistors it talked about joule stress - enough joule stress and the resistor would explode, rather than burn up this is as close to what i...
  8. W

    Need help in simulation

    try this for using step directive https://www.analog.com/en/resources/technical-articles/ltspice-using-the-step-command-to-perform-repeated-analysis.html .op sets the operating point you have not directed spice to do any analysis suggest you use step 1000 1600 100 this should give 6 steps...
  9. W

    non semiconductor devices

    not an expert in this subject, but: it depends on what the component is made of and how much radiation it gets hit with consider a thin film resistor - enough ionizing radiation can degrade its performance perhaps also a thick film resistor capacitors are two (or more) layers of a thin...
  10. W

    [SOLVED] What does THETA (greek letter) mean in electronics?

    page 1 of the data sheet lists theta as operating temperature, -40 to 70 degrees C the web page for said device https://www.hakel.com/en/product-hsa-275-detail-153948 has quick contact information with a phone number and an email address.
  11. W

    Thevenin total resistence question

    not quite sure what you are asking. nor do i follow what you wrote. 6 ohm in parallel with 3 ohm yields 2 ohm 2 ohms in parallel with a 2A source is 4 V Thevenin form is a 4V source with a 2 ohm series resistor shorted yields the 2A from Norton version
  12. W

    Fusion360

    you didn't say what format the 3D model is this may help: https://forums.autodesk.com/t5/fusion-360-electronics/how-to-add-3d-step-file-in-existing-pcb-library/m-p/9458768#M1316 the 4th post of 9 (Jorge Garcia) writes how to do it, but the instructions are a little short this video should...
  13. W

    [SOLVED] Need to make a up down counter from 40-00 and 00-40 without resting using two 74192 ic. Pls help

    this looks like a homework problem what does 7 segment display PCB mean? when does the buzzer buzz? you gave this title: "Need to make a up down counter from 40-00 and 00-40 without resting using two 74192 ic." when started, does it count down from 40 to 00, then automatically count up from...
  14. W

    placing high to low level shifter

    I'm not an exert on level shifters, however, I will state what seems obvious: the level shifter has to go between the low and high levels, with the zener diode / transistor / resistor that accomplishes the level shift placed between the low and high levels. i'm not sure what you mean by "be...
  15. W

    How to determine the integral a partial derivative term?

    i tried wolfram alpha i typed in your expression. wolfram alpha interpreted it as i think you need to specify p(x) and n(x)

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