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CCTV
I don't understand a lot of what you are writing but there is no way to completely hide a cable if you don’t want to mess the walls (unless if you have a furred ceiling or floor). A tip is to glue (by silicon or something) the cable and follow the path where the wall meets the ceiling or...
autocad electrical drawings
hmm! With Autocad (even Autocad Electrical) I don't think that you can have the features that you mention. I believe e-plan is indeed the best choice.
eplan racer pro
It really depends on the time that you are willing to spend in learning and designing. If u want something simple and fast i advise u to use Visio. If you would like to spend more time i prefer Autocad though until u learn to use it you will spend a lot of time in each design!
Anybody...
I tried today the circuit in Shematics but I have the same problem.
Has anybody any idea?
I use the following equation sto calculate R4,R5,R1,R2:
fo=1/2πRC where R=R4=R5 and C=C1=C2
Q=R2/R
they are standard for the Biquad filters
i am trying to design this bandpass filter [output V(6)] with fo=1kHz and BW=100Hz.
I am sure that my design is corect but Pspice doesn't agree and gives me bandwidth of 500Hz
Is there something wrong with my code?
please help
*Amplifier AC Input Voltage
*DC Voltage Source
Vcc 7 0 DC...
Yes. When you'll decide your supplier, it will be easier for you to understand how the various components work from their specifications and termination instractunions.
I mean the curtains and ppl moving outside the house. The motion sensors can't be pointed to a window.
Yes the control pannel is the brain of the system.
I think for your use magnetic switch type is ok.
I think you are ok. Simple is the best way!
Just be carefull to cover all the areas and pay attension about the pets and ppl walking outside the house (motion sensors -> windows)
Re: negative resistance
I've done some progress with the circuit if anyone is interested. The non-linear areas of the graph are caused because of voltage saturation (also known as clipping) depended on the input amplitude. There is a maximun and minimum value of input signal to make the op amp...
To everyone that is concerned about this subject I found that the standards for Security in 3G are:
3GPP TS 133.102 "Security Integration Guidelines"
3GPP TS 33.900 "A Guide to 3rd Generation Security"
It depends on the kind of place you want to secure and the the location. For example if it is a flat in a city it's ok but if it is an industry building on the country it is not enough.
In my opinion and my experience I prefer the glass break detector.
It is ussually a matter of sensitivity...
negative resistance
This circuit works as negative feedback when R1=8K2 and positive feedback for R1=18K.
The graph is what I get for negative feedback at 200Hz. I don't get it why is split in parts and why if I change the amplitude of the input some parts in both directions dissapear.
For...
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