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Recent content by imperatormk

  1. I

    Current`s direction reversal after a certain interval

    ...Now I feel like the biggest moron in the world. After a week of troubleshooting, I noticed that simply I was using UA741CN instead of CM555... 8O
  2. I

    Current`s direction reversal after a certain interval

    I feel you. I`ll measure each pin`s voltage and post it here. Sorry for not giving the necessary info.
  3. I

    Current`s direction reversal after a certain interval

    You are completely right :) I`ll start doing it and let you know if it works. :) ---------- Post added at 16:31 ---------- Previous post was at 15:36 ---------- OK, I assembled one part of the thing so as to see if the diode will flash when the output pulse goes high. However, the LED diode...
  4. I

    Current`s direction reversal after a certain interval

    I know the number positions but you can see that the numbers on the diagram differ from the numbers on the real 555 IC. I see that I need to connect the elements using narrow wires (depending on the location) and not as simple as on the diagram, where all elements are linked with straight lines...
  5. I

    Current`s direction reversal after a certain interval

    So, I haven`t yet started assembling the device and I have a problem. As you can see in the diagram, the 555 timer`s pin numbers are mixed so the device can be assembled without any problems. However, the pin numbers on the real IC differ from them on the diagram, making it difficult to link the...
  6. I

    Current`s direction reversal after a certain interval

    Now it makes MUCH more sense. Thank you a million... So, I am starting to assemble my device. If I run into troubles, I`ll post... Thank you again...
  7. I

    Current`s direction reversal after a certain interval

    OK, I studied the scheme but one part of it is confusing me. (The the part marked with a red rectangle): ImageShack® - Online Photo and Video Hosting Why there is a transformer and what do the red and blue dots mean? Thank you...
  8. I

    Current`s direction reversal after a certain interval

    So far nothing. The relay`s outputs shall be connected to an electomotor which is going to change it`s direction after a certain interval (due to the changed current direction by the relay driven by the 555 timer.) Correct me if I am wrong, but it should work fine.
  9. I

    Current`s direction reversal after a certain interval

    OK, I found something that is based on 555 timer and DPDT switch. Here is it`s scheme: ImageShack® - Online Photo and Video Hosting (Click to enlarge) But I have one question. I am not sure how to wire the 555 timer output wires with the DPDT relay, so some help would be useful...
  10. I

    Current`s direction reversal after a certain interval

    I get it. Now I need *timer* or something to turn on/off the transistor. Thank you for the clear up.
  11. I

    Current`s direction reversal after a certain interval

    Hmm, I need it to be automatic. I found something that might work? Would you be so kind to take a look of it and tell me your opinion? The 555 Bistable Circuit - Electronics in Meccano (Figure 2: The 555 Bistable Circuit) Note: it`s not automatic, but it`s a good start If it isn`t OK, can you...
  12. I

    Current`s direction reversal after a certain interval

    Hey, I need to make a simple device which will change the current`s direction after a certain interval (i.e 5 seconds.). Can you give me some idea or scheme of it`s construction? (Something with 555 timer would be OK.) Thank you in advance...

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