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  1. bertus

    A fun magazine : Hackspace

    bertus submitted a new resource: A fun magazine : Hackspace - Hackspace Read more about this resource...
  2. bertus

    What is a jumper cap and when do I use them?

    Hello, Does the wiki tell you more? https://en.wikipedia.org/wiki/Jumper_(computing) Bertus
  3. bertus

    COVID-19

    Hello, We are now at 5 million tested cases of corona now: https://www.worldometers.info/coronavirus/ Bertus
  4. bertus

    Heathkit Condenser Checker

    Hello, Does the post have a rim or slot on the back? That might be the cause of the slant. Bertus
  5. bertus

    Need help with a failed controller for a treadmill.

    Hello, The pictures are likely to large. Resize the pictures to about 300 kB. Bertus
  6. bertus

    A Funny Thing Happened on the way to this circuit

    Hello, When putting leds in parallel, each led must have its own current limiting resistor. When the supply voltage is high enough, you can put several leds in series with one resistor. You might want to read this thread made by Wendy on the AAC...
  7. bertus

    A Funny Thing Happened on the way to this circuit

    Hello, Do you have the specifications of the leds? When the leds do not need serial resistors, aka 12 Volt leds, they should light at the same time. It is not a good idee to put classic leds parallel. A classic blue led would need 3 to 3.5 Volts to work. A classic yellow led would need 2 to 2,5...
  8. bertus

    A Funny Thing Happened on the way to this circuit

    Hello, As always, when you have a question, post the schematic. Can you draw a schematic of the set-up? Bertus
  9. bertus

    Comedy Thread

    A burgler taking selfies:
  10. bertus

    SMPS

    Hello, I see that you also posted on AAC: https://forum.allaboutcircuits.com/threads/nicad-battery-charger.160710/ Did you see any bulging capacitors? Bertus
  11. bertus

    Comedy Thread

    Seen on an other forum:
  12. bertus

    Comedy Thread

    Ohms law:
  13. bertus

    Comedy Thread

    Fun with old parts. LED zeppelin:
  14. bertus

    Comedy Thread

  15. bertus

    simple component indentification

    Hello, They are not for uses as voltage transformers, but likely as pulse transformers. They are very tiny, about 4 mm each: https://www.researchgate.net/figure/Commercial-Ethernet-transformers-a-dual-in-line-pin-DIP-module-b-Individual_fig1_245513121 Here is an other picture with the...
  16. bertus

    Mixer psu problems

    Hello, Here is some data on the given mosfet: https://datasheetspdf.com/pdf/788195/SL/SVF4N65F/1 Bertus
  17. bertus

    buck-boost vs buck then boost

    Hello, There is an other variant, the SEPIC converter: https://en.wikipedia.org/wiki/Single-ended_primary-inductor_converter Bertus
  18. bertus

    simple component indentification

    Hello, I do not think that the part would be defective. There are only some transformers inside: This is the internal schematic of the SMD version. Bertus
  19. bertus

    simple component indentification

    Hello, The datasheets can only be found at jotrin. https://www.jotrin.com/product/parts/HN1628CG https://www.jotrin.com/product/parts/HN2018CG (you must create an account to see the datasheet). How many pins do the parts have? It could be there are several transformers in the part to isolate...
  20. bertus

    Can't quite figure out the function of the fourth terminal on a potentiometer.

    Hello, Perhaps this potmeter will do: https://www.vivatubes.com/vintage-lot-of-2-philco-304v7233-rotary-potentiometers-25k-ohms-pots/ Bertus
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