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  1. bertus

    Power supply overheating

    Hello, The +23 Volts is unregulated. Is the -23 Volts unregulated correct? It is made from the same taps of the transformer. Bertus
  2. bertus

    Convector heater component ident

    Hello, It is indeed a 10 A 157 C thermal fuse: https://www.tme.eu/en/details/bf157/thermal-fuses/aupo/ BF series datasheet: https://www.tme.eu/Document/bdc09498537597553d25678f42df7883/BF.pdf Bertus
  3. bertus

    Weight scale programming logic

    Hello, When you look at commercial scales, tehy will have slide doors to avoid draft influences on the measurement: https://www.phantomscales.com/buy/tree/hrb303.php https://scaleman.com/milligram-balance.html Bertus
  4. bertus

    Convector heater component ident

    Hello, Rivetting does not create heat. Heat would already blow the thermal fuse. Bertus
  5. bertus

    Convector heater component ident

    Hello, You can not solder the thermal fuses. I would use some bolts to fix them on the holes. Bertus
  6. bertus

    Urgent help in spectrometer

    Hello, Have a look here: https://en.wikipedia.org/wiki/Near-infrared_spectroscopy https://en.wikipedia.org/wiki/Fourier-transform_infrared_spectroscopy https://hackaday.com/2015/04/22/a-diy-fourier-transform-spectrometer/ Bertus
  7. bertus

    Power supply overheating

    Hello, Are the degrees celcius or fahrenheit? 200 degrees fahrenheit is about 94 degrees celcius. What is the unregulated voltage mentioned as 53 Volts? Bertus
  8. bertus

    Comedy Thread

    Found on AAC:
  9. bertus

    Convector heater component ident

    Hello, @RWD3M It could be that the bimetal switch cuts out at 130 degrees. Could it be the thermo fuse has a slightly higher value to cut out when the bimetal switch sticks? Bertus
  10. bertus

    Help with grundig stereo ums17 md

    Hello, Kenny is meaning this thread: HELP!!! I have a fault -- Read me FIRST Bertus
  11. bertus

    Relay switch - Live or Neutral to connect?

    Hello, It is a usual practice to switch the live side. When switching the neutral side, the switched device is still connected to live. Bertus
  12. bertus

    Help with Casio keyboard not working

    Hello, You can not measure the output current like that. When you use a current range, you will basicaly short the output of the powersupply. You can even damage the powersupply that way. Current is measured between powersupply and load. Bertus
  13. bertus

    Newbie Questions - sequential led lights

    Hello, You might want to have a look at this project at AAC: https://forum.allaboutcircuits.com/threads/project-knight-rider-style-sweeping-light.26977/ Bertus
  14. bertus

    Help with Casio keyboard not working

    Hello, @Harald Kapp , the chip you are pointng at is the power regulator. The LA4127 is the amplifier. Here is a link to an other casio keyboard that uses the same chips: https://www.manualslib.com/download/696755/Casio-Ctk-500.html Bertus
  15. bertus

    Stage Line 500W amp repair project

    Hello, Pete has also a thread running at AAC about the amplifier: Stage Line 500W amp repair, help please Bertus
  16. bertus

    Urgent help in spectrometer

    Hello, What kind of IR spectrometer are you looking for? There are several types like FTIR, RAMAN. https://www.bruker.com/en/products-and-solutions/infrared-and-raman/ft-ir-routine-spectrometer/what-is-ft-ir-spectroscopy.html...
  17. bertus

    Can't understand this schematic .. please help.

    Hello, The schematic uses a bus structure to avoid a lot of lines on the schematic. In the schematic I made some remarks: Bertus
  18. bertus

    Resources

    Hello, @Martaine2005 , when you go to https://maker.pro/forums/account/preferences in there you will find Style. In the pull down menu there are : Electronics Point (old) and Electronics point. The old is the classic version. Bertus Corrected link
  19. bertus

    Resources

    Hello, There are a lot of resources available in the classic version of the forum. They are hidden in the new version of the forum, but here is a link to the resources section: https://www.electronicspoint.com/forums/resources/ Bertus
  20. bertus

    PWM that will work with a reversible power supply

    Hello, No, you can not apply PWM on the powersupply. Bertus
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