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betwixt's latest activity

  • betwixt
    betwixt replied to the thread Touch GFX and LCD ili9341.
    I think they mean can it be used to design the display when it doesn't have a touch sensor. As Klaus stated, the ILI9341 is an IC that...
  • betwixt
    betwixt replied to the thread EPROM flash and change.
    I checked my stocks and unfortunately I only have 150nS 27C256 devices. I can program one for you if you want me to. It might work but...
  • betwixt
    betwixt replied to the thread Pulse Generator Without Using NE555.
    Why rectify it? Once you have a triangle wave you can feed it straight to a comparator circuit and compare it to a voltage adjustable...
  • betwixt
    betwixt replied to the thread How to read SD card file via Web GUI/App using ESP32?.
    I refer you to: https://forum.arduino.cc/t/use-arduino-webserver-with-sd-card/661436 To access it via WAN, I suggest you give it a...
  • betwixt
    betwixt replied to the thread DS1307 RTC Accuracy Rate.
    ...and if capacitors are needed you will need ones with the correct temperature coefficients to compensate for the crystal and DS1307...
  • betwixt
    betwixt replied to the thread How to read SD card file via Web GUI/App using ESP32?.
    Please define what you mean by LAN and WAN. ESP32 has WiFi, you can use it as an access point directly so you 'log in' to the actual...
  • betwixt
    betwixt replied to the thread EPROM flash and change.
    Are you sure that is a BIOS image, it looks to be something written in Microsoft BASIC ? Brian.
  • betwixt
    betwixt replied to the thread EPROM flash and change.
    Using a TL866 here with USB interface and "minipro" software under Linux. Programs just about everything, including EPROMs. I've...
  • betwixt
    betwixt replied to the thread EPROM flash and change.
    If DeviousDexter is in my part of the World, direct sunlight is in short supply at the moment. It could take weeks. If only EPROMs...
  • betwixt
    betwixt replied to the thread DS1307 RTC Accuracy Rate.
    The DS1307 is absolutely precise, always. It is just a counter circuit, some memory and some glue logic. Time keeping tolerance is...
  • betwixt
    betwixt replied to the thread EPROM flash and change.
    UV is the only way to erase them I'm afraid. Your picture shows one that has had a sticky label on it at some time so it probably has a...
  • betwixt
    betwixt replied to the thread [SOLVED] What does the last letter in the PCR406 identification code mean for SCRs?.
    It depends on manufacturer but my data sheet shows them graded by gate current so it might indicate how sensitive they are to...
  • betwixt
    betwixt replied to the thread EPROM flash and change.
    They are pin compatible and the EPROM has a slightly faster access time so it should work as a replacement. Yes, it is UV erasable, the...
  • betwixt
    betwixt replied to the thread opti-triac for low voltage AC.
    Nice to be mentioned in dispatches! The other point Klaus didn't mention but is relevant at low voltages is how 'closed' the switch has...
  • betwixt
    betwixt replied to the thread Where to get datasheets of this part.
    I think these are obsolete USB controllers. Try contacting www.realtek.com for information. Brian.
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