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Recent content by D.A.(Tony)Stewart

  1. D.A.(Tony)Stewart

    Thermal resistance through plastic case top?

    The case has 6 sides. Measuring the bottom side metal case, the Rj-case is given. (not the top) When there is no heatsink other than the minimal pads on FR4, the Rj-pcb thermal resistance is much higher. This reduces the resistance in half. So if testing the thermal resistance of the PCB...
  2. D.A.(Tony)Stewart

    zepter tf993

    I can only imagine that when the relay turns on the reference voltage shifts to a false over temperature condition, causing the relay to cycle every 5 cycles. Check the supply voltage and ground that may cause a drop in reference voltage or a rise in probe voltage that causes this fault...
  3. D.A.(Tony)Stewart

    Lightning melts ground wires

    If you re-read my last comment, you will figure it out. He was lucky as the lightning protection was insufficient.
  4. D.A.(Tony)Stewart

    Lightning melts ground wires

    As far as the -ve side always getting fried, understand that the path of highest resistance creates the most heat in series and lowest resistance when in parallel. Considering the ground -ve side is probably hull connected to a salty body of water for shrimp, which mechanism do you think causes...
  5. D.A.(Tony)Stewart

    Lightning melts ground wires

    The tops of clouds being positive cause bigger negative discharges than positive Yes. Many. and the user too. If lightning voltage was high enough to bridge the cloud to earth, what makes you think a small gap of floating batteries to the hull will be protected? With an antenna exposed to...
  6. D.A.(Tony)Stewart

    1 mosfet square wave driver doubles 24 V at output

    Either polar 0 to 1000 or bipolar -1000 to 1000 works. You will find using Kp where the nominal load is for 0 reference error to height manually and it may never be 500 or 0 anyways so use either method. Tuning: Due to gravity, the acceleration vs motor speed torque/load in the vertical axis...
  7. D.A.(Tony)Stewart

    1 mosfet square wave driver doubles 24 V at output

    You didn't respond to my questions. Does the clutch release slower with the diode? It should it you do a fast step off. But you can fix it if its a problem. But my guess is you want to run this in CCM. (continuous triangle current mode)
  8. D.A.(Tony)Stewart

    External vs Internal Clock

    HSC is obvious master clock LSI in a low speed (Independent)RC clock just for watchdog timer 40kHz LSC is for a real-time-clock RTC. There are hundreds of passive resonator options for MEMS or Crystals (XTAL) case, load capacitance, initial tolerance at room temp and stability over specified...
  9. D.A.(Tony)Stewart

    What is delay cell? Is it just big buffer?

    https://chat.openai.com says... The term "DLY cell" likely refers to a delay cell, which is a fundamental building block in digital circuits used for introducing a controlled delay in a signal path. The specific structure of a delay cell can vary based on the design requirements and technology...
  10. D.A.(Tony)Stewart

    Thermocouple good at room temp is good always?

    There is exist a proper way to calibrate thermocouples. Room temp does not measure gain or offset errors exactly but it gives a warm and fuzzy feeling if it reads 21 'C and warmer fuzzy feeling if it reads 25'C Example Temperature Ranges for Calibration: Type K Thermocouple: Calibration...
  11. D.A.(Tony)Stewart

    UART and receving more than it is expected.

    "I want to receive more than I want" This is a runaway uncertain statement. more than you expected? more than you requested? more than you got? In full duplex, a protocol exists to request more, or an explicit range of data using handshaking with REQuest <> ACKnowledge or NAK negative...
  12. D.A.(Tony)Stewart

    Hierarchical synthesis vs flatten synthesis

    Homework 101 DIY. Did you know Bing uses AI? even google. in future learn to search https://chat.openai.com/c/2d66f6de-883b-457c-b312-14f5b07fd931 What are advantages and disadvantages when we use Hierarchical synthesis and flatten synthesis ? Hierarchical synthesis and flatten synthesis...
  13. D.A.(Tony)Stewart

    Testing for a resistor value without using a multimeter?

    If you only had resistors and any NPN's I made this work with simulated testing. http://tinyurl.com/2dnjmqnz but will it interfere with the cable tester?? or does ever pin have resistors?
  14. D.A.(Tony)Stewart

    0-10V analog isolator design

    In other words, if the PWM ripple is greater than the resolution of the ADC then non monotonic missing codes or random hysteresis may occur due to the noise caused by Vpp ripple, again, if it exceeds the resolution. Non-monotonic errors can occur in uC's that do not separate Agnd from Dgnd in...
  15. D.A.(Tony)Stewart

    0-10V analog isolator design

    In other words, if the PWM ripple is greater than the resolution of the ADC then non monotonic missing codes or random hysteresis may occur due to the noise caused by Vpp ripple, again, if it exceeds the resolution.

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