Search results

Search Forums New Posts
  1. bertus

    Need Help with simple 9V circuit design.

    Hello, @ratstar , Mosfets do have a "linear" part in the transition curve. During the "linear mode" there will be power dissipation in the mosfet. That is why you want to do fast switching, so the time in "linear mode" is as short as possible to keep the dissipation low. Bertus
  2. bertus

    Electronics tutorial books

    bertus submitted a new resource: Electronics tutorial books - Electronics tutorial books Read more about this resource...
  3. bertus

    Electronics tutorial books

    Hello, You might know the "books" available on this site Lessons In Electronic Circuits The partner site has two "books" more available and some advanced "books": https://www.allaboutcircuits.com/textbook/ An other great resource is the US navy training books: The US Navy Electricity and...
  4. bertus

    ardino code for Two color LED to PIC18F45K80

    Hello, Have you tested the leds connections? Do you know wich pin is the common pin? Do you know if the led is common cathode or common anode? I found this page, where the left pin seems to be the common pin, the middle pin for red and the right pin for green...
  5. bertus

    Determining the source voltage

    Hello, Have a look at this page of the AC book, how to do calculations with AC signals that have different phases: https://www.allaboutcircuits.com/textbook/alternating-current/chpt-2/examples-ac-circuits/ Bertus
  6. bertus

    Not feeling the GiGa...

    Hello, Is the temperature in Celcius or Fahrenheit? When in Fahrenheit, the 110 would be about 43 degrees Celcius. That would not worry me. When it is 110 degrees Celcius, that would be bad. Bertus
  7. bertus

    Sleeve Antenna

    Hello, There are some antenna books from the ARRL on the internet archive: https://archive.org/details/TheArrlAntennaBook https://archive.org/details/fea_ARRL_Basic_Antennas A lot of theory and practical information can be found in them. Bertus
  8. bertus

    Not feeling the GiGa...

    Hello, And where was the black spot above? Bertus
  9. bertus

    Not feeling the GiGa...

    Hello, Yes, I am dutch, but realistic. Take a picture of the dark spot you see and post it over here. Bertus
  10. bertus

    Not feeling the GiGa...

    Hello, Reading the description on this page : https://www.pdf-manuals.com/samsung-mx-hs9000-giga-sound-system-mx-hs9000-za-253111-manual I can not get that a powerconsumption of 146 Watt can give 2600 Watt RMS output power. This is NOT possible. Bertus
  11. bertus

    Comedy Thread

    Found on AAC again:
  12. bertus

    Got a question about driving LEDs?

    Hello, Perhaps a little addition to your resource. The different colors of leds will have different forward voltages: Also a note on the different ciruits for leds in the attached PDF. Bertus
  13. bertus

    ardino code for Two color LED to PIC18F45K80

    Hello, Have a look for the datasheet of your PIC: https://www.microchip.com/wwwproducts/en/PIC18F45K80 The max pin current depends on wich port and pin on the port you are using: There must always a current limiting resistor be used. Bertus
  14. bertus

    Comedy Thread

    TI error page:
  15. bertus

    Direction of Current in AC circuits.

    Hello, Have a look at the AC textbook: https://www.allaboutcircuits.com/assets/pdf/alternating-current.pdf Here is the webpage for Chapter 5 - Reactance And Impedance -- R, L, And C: https://www.allaboutcircuits.com/textbook/alternating-current/chpt-5/series-parallel-r-l-and-c/ Bertus
  16. bertus

    meter that test 12 volts agm battery

    Hello, Perhaps Varta can tell you more: https://batteryworld.varta-automotive.com/en-be/battery-test-car https://batteryworld.varta-automotive.com/en-be/battery-test-results-interpret Bertus
  17. bertus

    meter that test 12 volts agm battery

    Hello, Most batteries are sealed, so you can not reach the individual cells. Some you will see the connections between the cells like the ones in the following picture: On those you can measure the individual cells. Bertus
  18. bertus

    How to test buzzer

    Hello, The buzzer could be part of the arduino sensor kit: https://tkkrlab.nl/wiki/Arduino_37_sensors Bertus
  19. bertus

    How to identify lead or lag on oscilloscope

    Hello, Perhaps the following pages might interest you: https://ez.analog.com/adieducation/university-program/b/blogs/posts/a-classic-phase-measurement-the-lissajous-pattern https://www.rfcafe.com/references/popular-electronics/lissajous-pattern-quiz-september-1963-popular-electronics.htm Bertus
  20. bertus

    How to test buzzer

    Hello, On the given page there are arduino programs to generate a sound with the buzzer. The passive uses fast switching of the arduino output to generate the oscilaltion frequency. Here is an other page that uses the passive buzzer with the arduino...
View older results
Top