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  1. bertus

    doubt batteries

    Hello, You will find a lot of information on batteries on the website of the battery university: https://batteryuniversity.com/ Bertus
  2. bertus

    Thermal fuse on printed circuit board

    Hello, Littelfuse has some more models of inline fuses and holders: https://www.littelfuse.com/products/fuse-blocks-fuseholders-and-fuse-accessories/automotive-and-commercial-vehicle-fuse-holders.aspx Bertus
  3. bertus

    Tom Mics Issues

    https://search.yahoo.com/search;_ylt=AwrFdpGbBaJj.w4Le3ZXNyoA;_ylc=X1MDMjc2NjY3OQRfcgMyBGZyA2FsdGF2aXN0YQRmcjIDc2ItdG9wBGdwcmlkA3ZKYVBTMXBWU1B1S24yUXZMX3RuWUEEbl9yc2x0AzAEbl9zdWdnAzEEb3JpZ2luA3NlYXJjaC55YWhvby5jb20EcG9zAzAEcHFzdHIDBHBxc3RybAMwBHFzdHJsAzE1BHF1ZXJ5AyUyMnRvbSUyMG1pY3MlMjIlMjBiZXN0BH...
  4. bertus

    doubt fails smd capacitors

    Hello, On the capsite you will find every thing you want to know about all types of capacitors: http://www.iequalscdvdt.com/ Bertus
  5. bertus

    Thermistor sensor

    FYI, there is also a thread running at AllAboutCircuits: https://forum.allaboutcircuits.com/threads/sensor-thermistor-design.190950/ Bertus
  6. bertus

    Need help with a Sony sony icf-sw7600 AM not working

    Hello, Perhaps the following page might give you an idea for an RF probe: https://www.qsl.net/g3oou/simplerfdetectors.html Bertus
  7. bertus

    Main board thrustmaster t300, component C90 KO

    Hello, @Destro77 , This is an english only site. Please use english over here. I have translated both posts, using google: Hello, I request you concerning the PCB of my base Thrustmaster T300RS. The base has stopped suddenly and a smell of burnt is made felt. After opening the base for...
  8. bertus

    Need help with a Sony sony icf-sw7600 AM not working

    Hello, Perhaps there are some tips in the service manual: https://elektrotanya.com/sony_icf-sw7600_receiver_sm.pdf/download.html Bertus
  9. bertus

    Clavinova FX conversion

    Hello, Does your system have the following connections: Then there is an input for external signals. Bertus
  10. bertus

    police lights with 555 timer

    Hello, Wendy made a comparable circuit on AllAboutCircuits: https://forum.allaboutcircuits.com/threads/leds-555s-flashers-and-light-chasers.19075/#post-117647 Bertus
  11. bertus

    police lights with 555 timer

    Hello, There is also an error at the 555: Bertus
  12. bertus

    a transistor is a variable resistor

    Hello, A VDR is a voltage DEPENDEND resistor. Nowerdays they are called MOV. Bertus
  13. bertus

    a transistor is a variable resistor

    Hello, I have been busy with electronics for about 50 years now. I have been reading a lot of books on electronics and have been experimenting with electronics too. The internet archive has a lot of electronics books from beginner to very advanced...
  14. bertus

    Meaning of square symbol ?

    Hello, I see you are using the "default" version. In your profile under preferences, you can set the style. There are default, electronics point (old) and maker pro retro. The box does not show in the "maker pro retro"style. The box means to indicate the join date. the baloon means the number...
  15. bertus

    Meaning of square symbol ?

    Hello, Wich version are you using? I do not see it in the "maker pro retro" version. Could you post A screenshot of the section? Bertus
  16. bertus

    a transistor is a variable resistor

    Hello, @dragon , You could have a look here to learn the basics of electronics: https://www.allaboutcircuits.com/textbook/ Also the following books might help. For absolute beginners this might be reasonable: https://archive.org/details/electronicsfordummies_201910 For more understanding of...
  17. bertus

    a transistor is a variable resistor

    Hello, It can NOT be done with only passive elements. A JFET can be used as a voltage controlled resistor on a small signals: https://en.wikipedia.org/wiki/JFET Also read the attached PDF. Bertus PS did you have a look at the conversation?
  18. bertus

    a transistor is a variable resistor

    Hello, A variable resistor could be a rheostat: https://en.wikipedia.org/wiki/Potentiometer#Rheostat Bertus
  19. bertus

    Working on a 3-voice 40106 oscillator. Need help...

    Hello, As far as I know a bagpipe consists of a bag with a couple of fixed pipes (drones) and a plpaying pipe (chanter) https://en.wikipedia.org/wiki/Bagpipes You could adapt the Andres Siagian: Bertus
  20. bertus

    Working on a 3-voice 40106 oscillator. Need help...

    Hello, Do you know this page? https://andreassiagian.wordpress.com/2013/03/10/hex-oscillator-using-40106-tutorial/ Perhaps it gives you more ideas. Bertus
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