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Type: Posts; User: ZASto

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  1. Closed: Re: ds1307 Rtc clock running slow by 6 second per day.

    It is impossible to slow down the clock running a huge program.
    Accessing the DS1307 only reads secondary registers not influencing clock operation
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    Closed: Re: Identify an electronic component

    Did you try to use Google?

    https://alltransistors.com/smd-search.php?search=SA
    http://www.s-manuals.com/smd/sa
    http://www.marsport.org.uk/smd/mainframe.htm
    http://www.s-manuals.com/smd/
  3. Closed: Re: Mains leaking currents causing problems in my house

    You are absolutely right about "tester" :D
    If he does not survive, anyway will be "grounded" :D
  4. Closed: Re: Mains leaking currents causing problems in my house

    Until you install proper grounding you will feel electric shocks.

    Wet your bathroom floor, stand on it barefoot and touch your PC when switched on.
    If you survive, please describe the feel :) (DO...
  5. Closed: Re: Mains leaking currents causing problems in my house

    Do not connect third (ground) terminal with neutral. Lethal voltages could be present on chassis of metallic objects like washing machine, cooker, water heater, and you could be electrocuted, and...
  6. Closed: Re: Mains leaking currents causing problems in my house

    Brian,
    I've not seen ANY PE wire in pictures in post #6. Just two sockets wired in parallel :)

    Even the cross section of wires comming out of 32A breakers is inadequate.

    For lazy people:...
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    Closed: Re: "Self-Healing" 12V 30A Circuit

    In your picture, the 8 pin device looks like a MOSFET. It even nas a series resistor to Gate. And element next to it could be shunt resistor for current measuring. You should trace where tht small...
  8. Closed: Re: Mains leaking currents causing problems in my house

    Whoever designed that panel should be found accountable in case of fire caused by inadequate circuit breakers.
    32A breakers are way to much for your wires that are connected to their outputs.
    I...
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    [SOLVED]Closed: Re: ARM Cortex M4 core Miro processors

    https://www.maximintegrated.com/en/products/microcontrollers/MAX32625.html

    Here you have it :)
  10. Closed: Re: Why logic High input is logic low on I2C data bus?

    You forgot bolded part!

    BTW I2C master usually has open drain output, so with pullup resistors I2C bus is idling HIGH (by voltage), and it represents logic ZERO. Accordingly, when pin is pulled...
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    Closed: Re: Replacement for AD848JR

    Dikey has 0 pieces in stock.
  12. Closed: Re: Runtime of clock using alkaline D cells instead of AA batteries

    15000mAh / 2400mAh = 6.25
    60days * 6.25 = 375days

    How this compute :D
  13. Closed: Re: please help to identify component with marking BEQX with Japanese writing.

    On the first link that I posted, you have the BE marking in SOT-89
  14. Closed: Re: How can I tell if my laptop screen is LED or LCD?

    Of course, Klaus, but with a price tag the OP's question would be irelevant :smile:
  15. Closed: Re: How can I tell if my laptop screen is LED or LCD?

    Your laptop has LCD panel (as every laptop has).
    Difference is only in backlighting. It can be LED or CCFL.
    In last couple of years, all laptop panels are with LED lighting.
  16. Closed: Re: please help to identify component with marking BEQX with Japanese writing.

    And you do nit like to use google or some other search engine.
    In your post is missing info about the circuit that the component is in, a photo from a different angle that the number of leads could...
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    Closed: Re: Shunt in DC ammeter circuit

    Did you connect it this way?

    155422

    Green rectangle is LOAD,
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    Closed: Re: PT100 interfacing with controller

    Thermocouples are generating voltage, Pt-100 is temperature dependent resistor!
    Apples and Oranges.
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    Closed: Re: PT100 interfacing with controller

    220 Ohm is approx. 315 degrees C.
    You should try different approach for measuring with Pt-100. Connect it to 1mA constant current source and then measure/amplify voltage that dropped on Pt-100.
    I...
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    Closed: Re: Reading Analog value Rasberry pi

    MCP4725 is Digital-to-Analog Converter not ADC
    It generates voltage dependent on digital value that it receives through I2C.
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    [SOLVED]Closed: Re: Identify Replacement Capacitor

    47 microfarad, 16V.
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    Closed: Re: Extend life of UV lamp.

    Mercury vapour produces UV wavelength of 273nm (UV-C)
    That part of UV spectrum gets totally absorbed in atmosphere. Mainly used to be used for UV-EPROM erasing, still used for desinfection in bio...
  23. Closed: Re: How does one learn to read a schematic? (Marshall tube guitar amp)

    You should search datasheets for the tubes :-)
    155199
    155198

    What are markings on V4..V7?
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    Closed: Re: HX711 mV/V information needed

    If a sensor is declared to 200% overload, 300+% will produce plastic deformation to the sensor and it will be rendered useless. Mechanical construction does not figure anymore.

    As per Klaus...
  25. Closed: Re: Can someone help me to find out what an unknown PCB is?

    Welllll... you should use some medicine for your memory :-) :-D
    I usually remember what some of PCB's are for, BTW I design them myself, even after years laying in the drawer.
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