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  • Users: VolkerR
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  1. VolkerR

    Flyback Optocoupler

    Hi, I need to design a simple flyback circuit, but I am having problems understanding the voltage regulation principle, mainly concerning the feedback optocoupler. I was googling and reading datasheets for hours, but I was not able to find an answer to my question. In most example flyback...
  2. VolkerR

    Speech Synthesizer Chip

    Hello, I just came across this chip: http://www.hvwtech.com/pages/products_view.asp?ProductID=505 It is being sold as "single chip voice and complex sound synthesizer". Actually, it looks to me as if it is a PIC18F1220 or 18F1320 with it's markings removed, running on the internal...
  3. VolkerR

    PSK31 with a MCU ?

    I was wondering if anybody has experience with implementing PSK31 (a fairly new amateur radio mode) in a microcontroller. Specifically, would it be possible to use a SSB capable short wave receiver and some hardware to listen to PSK31 conversations on an LC-display, without a PC ? The amateur...

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