Search results

Search Forums New Posts
  1. bertus

    How to create an equation to solve for resistance in this circuit

    Hello, This site has its own tutorials: https://www.electronicspoint.com/forums/categories/lessons-in-electronic-circuits.176/ The partner site All About Circuits has also a workbook with questions and a reference: https://www.allaboutcircuits.com/textbook/...
  2. bertus

    Servo with higher voltage

    Hello, Here is the complete datasheet from the link. Bertus
  3. bertus

    Acer Aspire 4738 laptop intermittent shut off

    Hello, Does the laptop have a CD/DVD drive? If so, try to boot for instance a dvd like Hiren's boot CD: https://www.hirensbootcd.org/ Perhaps you will need an older version, wich can be downloaded here: https://www.hirensbootcd.org/old-versions/ When it boots from the CD and keeps running...
  4. bertus

    HP1650A logic analyser boot disk

    Hello, You hyjacked an 10 year old thread and are using a non english language. As I understand you are looking for software for the HP1650. Have a look here: https://the-eye.eu/public/Books/bitsavers.org/bitsavers.informatik.uni-stuttgart.de/bits/HP/1650/ Bertus
  5. bertus

    Crown CE2000 Power amp repair question ...

    Hello, The page I posted shows an 2n4991, wich is still available: https://www.newark.com/solid-state/2n4991/bilateral-switch-5ma-to-92/dp/67R1096 Bertus
  6. bertus

    Crown CE2000 Power amp repair question ...

    Hello, I have taken out the protection part of the schematic: This page shows likely some alternatives: https://ecompsystems.com/discretes/silicon-bidirectional-switches-sbss/ Bertus
  7. bertus

    Wire

    Hello, The magnet wire is covered with enamel. Enamel will melt at the temperature of your soldering iron. https://hackaday.com/2020/03/09/dont-scrape-magnet-wire-do-this-instead/ You can search for magnet wire or enamel wire...
  8. bertus

    How to connect piezo speakers to an amplifier

    Hello, What are you trying to do? The speaker is only for VERY high tones. The linked page only has a graph from 15 to 39 kHz. This is well above the tones human can hear. The page shows a frequency range from 2 to 60 kHz. I would not expect a high level at 2 kHz, due to the small size. Bertus
  9. bertus

    Wire

    Hello, Amazon has a lot to offer: https://www.amazon.com/s?k=solid+hook+up+wire+kit&rh=p_n_condition-type:6461716011,p_72:2661618011&dc&qid=1588844878&refresh=1&rnid=2528832011&swrs=9940E9DC72EA541138B1152B0B52EA0C&ref=sr_nr_p_89_5 When you take a kit, you will have several colors, so you can...
  10. bertus

    Comedy Thread

    A social distancing match: Bertus
  11. bertus

    Can you identify this power switch?

    Hello, The resistor is in the switch to regulate the current for the neon lamp inside the switch. Without the resistor, the neon light would blow. Bertus
  12. bertus

    Can you identify this power switch?

    Hello, That looks like a switch with a build in neon light. There are many around, but the shape will be different...
  13. bertus

    Transformer Current Output

    Hello, Perhaps the table on this page might help: https://antiqueradios.com/forums/viewtopic.php?t=345795 Bertus
  14. bertus

    Comedy Thread

    Hello, Easier breathing: Bertus
  15. bertus

    measuring output current circuit ?

    Hello, The shown table is for USB 3.0 That allows to have higher voltages on the powerbus. https://en.wikipedia.org/wiki/USB_hardware Bertus
  16. bertus

    Electric motor on planer quits running after 1 minute

    Hello, When the filesize is to big, you will get an error message. When you keep the filesize at about 300 k, you will be fine. You can reduce the filesize with a paintlike program. Bertus
  17. bertus

    Why is this Happening to Me?

    Hello, You might want to have a look at this book: https://archive.org/details/StartingElectronicsConstruction/mode/2up Bertus
  18. bertus

    Why is this Happening to Me?

    Hello, For planning the layout, you could try some layout software mentioned on this page: https://www.electroschematics.com/veroboard-design-software/ Bertus
  19. bertus

    Why is this Happening to Me?

    Hello, Here is a tutorial on using the stripboard: https://nathandumont.com/blog/stripboard-circuit-construction For cutting the traces, I use an 3 mm drill in a handholder. It could be something like this: https://www.amazon.com/Smart-Fun-Precision-Model-Rotary/dp/B01DBN8PLI There are special...
  20. bertus

    COVID-19

    Hello, On twitter from a dutch news blog: The Dutch are inventing new words to describe the impact of the virus. - Huidhonger (skin hunger): a longing for human contact during isolation - Toogviroloog (blather virologist): someone who spreads false information about coronavirus...
Top