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Recent content by chrhuy

  1. chrhuy

    Siemens S5 115U CPU Problem

    u-stack s5 siemens Hi Swilly, Thanks for your reply. I have the software so i can check the U and B-stack, but i don't know enough about it to understand what i means... Can you tell me what i have to look for, cause we tried to unplug each module like you said, but with no change. Is there a...
  2. chrhuy

    AC Current or Zero crossing measurement

    This is a special IC that could do the job for you... A zero crossing switch used a lot in TRIAC switching applications. Hope this helps... Grtz Chrhuy.
  3. chrhuy

    air flow sensor - diy hot wire air flow circuit

    thermistors+air flow sensor Not all systems work with resistors, if i am correct, the automotive air flow sensors do not... they work with a constant heating element and measure the amount of cooling... A guy once told me, that some of them use a very thin wire, like a light bulb, so when they...
  4. chrhuy

    Siemens S5 115U CPU Problem

    siemens s5 115u I have a problem with a 115U CPU, i hope somebody can help me... I can't seem to get the CPU into RUN, and it is not a problem with this specific device, cause i have 3 more en all with the same problem. 2 Led's are lit, the red STOP led and the red BA led. Is there something i...

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