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  1. bertus

    Connecting two buck boost boards for a split supply?

    Hello, The drawn setup will only work when the converters are fully in/out isolated. Bertus
  2. bertus

    Comparing Motor Starting Methods: Star to DOL vs. Star to Delta

    Hello, Then why do you have "school" as company name / institute? Bertus
  3. bertus

    Change My Motherboard Myself? Need Recommendations

    Hello, What will be the main use of your pc? For gaming there are other requirements than for a office computer. Have a look at the following page where a lot will be shown: https://www.pcmag.com/picks/the-best-motherboards https://www.techspot.com/bestof/motherboards/ Bertus
  4. bertus

    Change My Motherboard Myself? Need Recommendations

    Hello, Did you read this? https://www.pcmag.com/news/intel-hints-13th-14th-gen-desktop-chip-bug-results-in-permanent-damage https://www.pcmag.com/explainers/intels-raptor-lake-desktop-cpu-bug-what-to-know-what-to-do-now There seems to be a bug in the newer intel processors. Bertus
  5. bertus

    Bluetooth Audio Module - Distortion and Quality Issues at High Volume

    Hello, Is the speaker in a proper enclosure? Do you really need more power? https://sound-au.com/articles/amp-power.htm Bertus
  6. bertus

    Bluetooth Audio Module - Distortion and Quality Issues at High Volume

    Hello, The BT201 module already has a 3W amplifier on board. A PAM8403 is also 3W so it will bring no extra power. For more power have a look at a PAM 8610 module wich is 10 W. Bertus
  7. bertus

    My transistor is heating up very much and become failure

    Hello, Looking at the crossreference kt603, it draws 30 mA at 12 Volts. The transistor should have no problem with that 30 mA. Bertus
  8. bertus

    My transistor is heating up very much and become failure

    Hello, Did you try to turn over the coil contacts of the relais? Perhaps it has a diode build in. Bertus
  9. bertus

    My transistor is heating up very much and become failure

    Hello, Do you have a datasheet of the relais? What is the type number of the relais? Bertus
  10. bertus

    My transistor is heating up very much and become failure

    Hello, What current has the relais when activated? Usualy the base current is 1/10 of the collector current in a switching application. It could well be that the 1K base resistor is to large. Bertus
  11. bertus

    possible to make hackrf like device with esp32 arduino??

    Hello, Do you have a laptop or pc? Then have a look at a sdr stick: https://www.amazon.nl/s?k=sdr+usb&crid=3EBDEL86V5WN7&sprefix=sdr%2Caps%2C116&ref=nb_sb_ss_pltr-sample-20_4_3 Bertus
  12. bertus

    Ryobi 4v cordless drill

    Hello, Make a screenshot of your schematic and upload the picture. Bertus
  13. bertus

    Help with Transformer Theory

    Hello, A ideal transformer will have the same power on the output as on the input. You can never have more power out as in. Here is a page on transformers on AAC: https://www.allaboutcircuits.com/textbook/alternating-current/chpt-9/step-up-and-step-down-transformers/ Bertus
  14. bertus

    I want to know all of the maths concerning this scissor mechanism!

    Hello, Here are some pages about gearing forces: https://khkgears.net/new/gear_knowledge/gear_technical_reference/gear_forces.html https://drivetrainhub.com/notebooks/gears/strength/Chapter%201%20-%20Force%20Analysis.html I hope you can get the wanted info from that pages. Bertus
  15. bertus

    Help fixing Digital Multimeter Proskit MT1210 (2)

    Hello, From the manual: For continue protection against fire; replace fuse only with the specified voltage and current ratings: F 500mA/250V(Quick Acting) https://manuals.plus/proskit/mt-1210-economic-digital-multimeter-manual Bertus
  16. bertus

    Trying to identify a (zener?) diode by color

    Hello, Are you sure it is a zener diode? Have a look at this page for some color codes on diodes: https://www.repaircompanion.com/diode_color_markings Bertus
  17. bertus

    3v step down from 12v

    Hello, Perhaps this sparkfun page might give you an idea what is possible with a multimeter: https://learn.sparkfun.com/tutorials/how-to-use-a-multimeter/all Bertus
  18. bertus

    3v step down from 12v

    Hello, You could buy a decent multimeter at amazon: https://www.amazon.com/gp/aw/d/B0B57PFFYX/ref=dp_ob_neva_mobile Bertus
  19. bertus

    3v step down from 12v

    Hello, Can you measure the output voltage of the down converter? When you did not make any changes, the potmeter on the board sets the output voltage. Bertus
  20. bertus

    3v step down from 12v

    Hello, Did you follow the instructions in post #19 given by @Bluejets ? You will need to cut a trace on top and solder two points for the given voltage together. Bertus
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