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  1. Arouse1973

    Rewiring Garage Door Opener

    Great thanks. Having a second look at the RX PCB, it looks like a diode is hiding under the antenna wire. The voltage rating of the surface mount electrolytic is quite high, possibly indication it is the smoothing capacitor for the rectifier. Let me have a closer look.
  2. Arouse1973

    Rewiring Garage Door Opener

    It also doesn't look like the transformer powers the RX PCB (Vcc). Orange and Grey, where do they actually go? Because I would be looking for some kind of rectification circuit to convert AC-DC. It's possible it is done of the RX PCB but I couldn't make out any of the component values. Any...
  3. Arouse1973

    Rewiring Garage Door Opener

    As far as you have checked, does the wiring of the Transformer and PCB match the wiring diagram?
  4. Arouse1973

    Rewiring Garage Door Opener

    The RX is the green PCB?
  5. Arouse1973

    Rewiring Garage Door Opener

    Hello I am assuming you are going to keep the voltage AC? You have an AC motor on the wiring diagram this will require AC to work as it is. Or are you not using the motor? Thanks Adam
  6. Arouse1973

    My electromagnetic pulse generator

    All you have produced is an EMI device nothing more. An EMP device will produce energy to damage a device from a considerable distance. Why do you want to do this anyway. Adam
  7. Arouse1973

    Impedance Matching

    I don't see any information or video on how to do this, did you forget to upload it? Thanks Adam
  8. Arouse1973

    Forum Category Feedback

    Looks good Ian. We get a lot of Physics questions that come up and how components work. Also it would be good to see a section for PCB design and EMC/EMI issues and or EMC concepts, this could include all the latest regulations for CE marking which is an important part of todays design...
  9. Arouse1973

    Gain of operational amplifier...

    The gain is 1+(R1/R2) for a non-inverting stage. The coil is on the input so the gain remains the same. If R2 is zero, well it can't be zero but will be very low then the gain will be very high, too high I suspect for the circuit to work correctly. Thanks Adam
  10. Arouse1973

    ARDUINO coding

    Check out this, it might help. http://www.gammon.com.au/forum/?id=11516 Thanks Adam
  11. Arouse1973

    Unable to read frequency of a tone signal with a frequency meter.

    Good News!
  12. Arouse1973

    Unable to read frequency of a tone signal with a frequency meter.

    Don't know if this is of use to you. It explains a bit about some of the setting. But I guess you know most of this stuff already. Cheers Adam
  13. Arouse1973

    Unable to read frequency of a tone signal with a frequency meter.

    If that trace is 20 mV per division then it's greater than 80 mV. Just out of interest what wave shape were you using from your signal generator when you did the test with it? Cheers Adam
  14. Arouse1973

    Unable to read frequency of a tone signal with a frequency meter.

    Are you able to get some pictures of the scope trace of the signal on the output of your circuit? Thanks Adam
  15. Arouse1973

    Unable to read frequency of a tone signal with a frequency meter.

    Ok cool. Strange one this is :)
  16. Arouse1973

    In need of help with buzzer and LED light

    I did say something like this. I was giving the OP an idea. :)
  17. Arouse1973

    Unable to read frequency of a tone signal with a frequency meter.

    Have you tried changing the attenuator setting to x20? For DC coupling the manual say less than or equal to 80 mV. Does that mean that is the maximum voltage you can apply to the counter with x1 set? Thanks Adam
  18. Arouse1973

    Unable to read frequency of a tone signal with a frequency meter.

    What setting and channel are you using. Looks like you have to use DC coupling for that frequency and you are limited to 80 mV. That seems quite a low voltage to me, is that right? Thanks Adam
  19. Arouse1973

    Unable to read frequency of a tone signal with a frequency meter.

    Hello What is the amplitude of the waveform? Thanks Adam
  20. Arouse1973

    In need of help with buzzer and LED light

    Hello and welcome to EP. I would look at something like this: https://www.amazon.co.uk/Channel-Wireless-Control-Receiver-Transmitter/dp/6040387718 Thanks Adam
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