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Type: Posts; User: Karam

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    Whilst mechanisms exist to detect mains signal in...

    Whilst mechanisms exist to detect mains signal in both the IPD and in QLDs and SLDs, the problem is how to use these to achieve what you want. So for example the IPD(S) has a connection within Cortex...
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    You need to create a voltage divider at the QAI....

    You need to create a voltage divider at the QAI. The standard version QAI provides a 3.3V terminal. You connect your thermistor between the 3.3V terminal and the desired input channel and you connect...
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    Yes I think most people don't quite appreciate...

    Yes I think most people don't quite appreciate how useful audio is, possibly because most home automation tends to be thought of and provided in the realm of mainly remote control and rudimentary...
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    As Chris suggests you could have the individual...

    As Chris suggests you could have the individual names of the doors reported, or different sounds for different doors. You could trigger flashing lights (though this won't tell you which door unless...
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    There is some internal filtering on the inputs...

    There is some internal filtering on the inputs but not so aggressive since they have to be able to pulse count at a fair rate. You can try putting a capacitor across the digital input channel,...
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    You can find the Update History files by visiting...

    You can find the Update History files by visiting the Auto update menu and click on the top right wording 'Update History'.

    Regarding the Hot water, is there a need to sense the orange wire state?...
  7. Thread: Auto update

    by Karam
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    Auto updates are turned off for the time being as...

    Auto updates are turned off for the time being as we prepare for the next public update.
  8. Thread: Power sockets

    by Karam
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    Only problem is I forgot that the time...

    Only problem is I forgot that the time accumulator object is not in the present release of Cortex ..
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    I believe it was a GP2D15 that was used in the...

    I believe it was a GP2D15 that was used in the original testing and Vivian made some modification to a resistor at the back to increase range from the spec. value of 24cm to ~130cm. I can't find the...
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    Hacking a wireless handset is not out of the...

    Hacking a wireless handset is not out of the question - I had to do this myself for one application of large blinds, where I used a bunch of optoisolators between an ODO and the button pads on the...
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    Yes but we can't make them in volume. I'll send...

    Yes but we can't make them in volume. I'll send you the spec sheet.
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    You can adjust the PIR inhibit period from the...

    You can adjust the PIR inhibit period from the room behaviour advanced option menu, but I'm not entirely convinced that there may not be another issue so I'm awaiting to discuss with Vivian.
  13. Problem is that the output voltage from the...

    Problem is that the output voltage from the sensor at longer distances is dropping below what is needed (~0.7V) to turn on the transistor. A simple option might be to use a germanium transistor which...
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    As Chris suggests the camera images still somehow...

    As Chris suggests the camera images still somehow have to get to Cortex in order to make use of any of its processing and integration features. I think you'll probably be able to run 6 cameras ok if...
  15. Apologies, don't know what I was thinking .....

    Apologies, don't know what I was thinking .. You'll need an NPN transistor (and base resistor) between the IR unit and the digital input. So output signal goes via base resistor (say 1k-4k7) to base...
  16. It was Vivian who experimented with these but I...

    It was Vivian who experimented with these but I think it was just to adjust the range of a digital output variant (might have been the GP2D15). Looking through Farnell web site I find for example:...
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    Interesting to note that the Rain-Clik from...

    Interesting to note that the Rain-Clik from Hunter industries quotes a range of up to 244m. Seems pretty precise for a wireless technology :-). Just amused me, that's all. Probably a result of the...
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    A rain sensor would also be a good idea unless...

    A rain sensor would also be a good idea unless somehow integral (but how would you then know state of window?) ...
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    IO Home Control appears to be an 868MHz band RF...

    IO Home Control appears to be an 868MHz band RF control protocol - looks to have been concocted by Honeywell but not adopted by so many. Honeywell themselves use other protocols. Anyhow it is not a...
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    That's a good point Chris. If the receiver unit...

    That's a good point Chris. If the receiver unit is not integral then there may well be access to the motors and perhaps even feedback. On the other hand one might have to be careful to check that the...
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    Yes it looks like the wall switch interface could...

    Yes it looks like the wall switch interface could be the simple solution and Cortex does have a dedicated object for managing that kind of appliance (using relays in place of the buttons). If Velux...
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    I understand what you mean about the pesky little...

    I understand what you mean about the pesky little fuses, but my opinion is that it probably is overkill to have an additional 3A MCB between each load and output. In the past we overcautiously used...
  23. Thread: Power sockets

    by Karam
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    1,388

    Yes I think a password object + time accumulator...

    Yes I think a password object + time accumulator object + perhaps a logic gate or two should be able to implement a function whereby, for a given day, every time you enter the password you toggle a...
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    Usually this happens if one object is overlapping...

    Usually this happens if one object is overlapping another (e.g some room or part of the other floor) and then you select the first object. So the dotted line indicates that it is hidden underneath....
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    It may still be worth while looking to see how...

    It may still be worth while looking to see how these relate to the standard temperature sensors in the vicinity. Its true that their readings will be coarser (I think you're going to get 0.4-0.5C...
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