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  1. bertus

    PWM Module with Dual Source/Sink Outputs using SG3525

    Hello, The link i gave is the complete project. Bertus
  2. bertus

    PWM Module with Dual Source/Sink Outputs using SG3525

    Hello, More info here: https://www.electronics-lab.com/project/pwm-module-with-dual-source-sink-outputs-using-sg3525/ Bertus
  3. bertus

    tiny 12v fan for my miniature models to exhaust humidifier vapor/misthi

    Hello, You do not need a hurricane for a humidifier. A gentle breeze might do. You can slowdown the fan using a simple pwm circuit. SgtWookie made one on allaboutcircuits: https://forum.allaboutcircuits.com/threads/project-simple-pwm-circuit.9016/ Bertus
  4. bertus

    UPS Repair

    Old thread , locked
  5. bertus

    tiny 12v fan for my miniature models to exhaust humidifier vapor/misthi

    Hello, Your link does not work. It requires a login. Bertus
  6. bertus

    And now something weird

  7. bertus

    Oscilloscope samples/sec and memory depth parameter

    Hello, Have a look around page 40 of the attached pdf. Bertus
  8. bertus

    Unknown chip that looks blown

    Try to practice on some other board.
  9. bertus

    Unknown chip that looks blown

    Hello, The chip is a power controller that does not need programming. Bertus
  10. bertus

    Power supply?

    Hello, Looking at the schematic, it is a single powersupply. The connection of the yellow post is not in the schematic. The two meters are for voltage and current. Bertus
  11. bertus

    tiny 12v fan for my miniature models to exhaust humidifier vapor/misthi

    Hello, 2-3 " is about 50 to 75 mm. A lot of fans have a size of 40 or 60 mm. Bertus
  12. bertus

    Unknown chip that looks blown

    Hello, Yes, that is the correct chip. It says 6714 in the datasheet as on the chip. Bertus
  13. bertus

    Yaesu FT-757GX will not transmit on 17M or 12M bands RX is OK

    Hello, I have seen the 1N4148 was replaced by an 1N4448. It is has a little higher current rating. Bertus
  14. bertus

    Unknown chip that looks blown

    Hello, I see the chip has 10 pins. There are some microcontrollers with 10 pins. You can likely not replace the microcontroller, as it likely has a custom program running on it. Bertus
  15. bertus

    Comedy Thread

  16. bertus

    HAM radio operation

    Hello, I also have a ham license since 1978. Bertus
  17. bertus

    HAM radio operation

    Hello, As the user bought a "pair" of handheld tranceivers, both users should be licensed. Bertus
  18. bertus

    Need Repair Advice on Proton 320 Clock Radio

    Hello, What is wrong with your clock-radio? Are these the manuals? https://www.jabse.com/Ly4gUmFyZSBhbmQgQW5jaWVudCBFcXVpcG1lbnQvUFJPVE9OL0F1ZGlvLzMyMA-- Bertus
  19. bertus

    how do i build a multi frequency RF detector

    Hello, It is for both, rf and ir. Here is an english link...
  20. bertus

    how do i build a multi frequency RF detector

    Hello, Here is a cheaper option than the first one that harald showed...
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