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523 Threads found on edaboard.com: Analogue
Hi! My application requires sampling of three analogue lines and transmitting the results via serial line. I am thinking to use NXP Kinetis L03 series - MKL03Z8VFG4. But I am not sure about the analogue reference voltage pin. The datasheet says (on page number 34): "For packages without dedicated VREFH and VREFL pins, VREFH is internally tied t
Hi, I am using easy PIC 6 board with a pic16f887 chip. The code is shown below but I seem to be getting really large values. I am using RA2 as a analogue input (which will be for the amplification circuitry output from my fingertip sensor). I want to achieve each peak (positive) value within 15 seconds and multiply this value by 4 to get beats
Hi all, I am trying to design a circuit to read the output of an Allegro ACS758 sensor on an analogue meter. Cheap meters have around 220 uA FSD. So I don't want to connect the output of an ACS758 Hall Sensor directly to such a meter. I thought about putting in a buffer op-amp circuit using a CA3130. However since the circuit is powered off 24
Any measurement in the analogue domain implicitly carries a certain degree of inaccuracy, so that performing a measurement in parallel with the equipment itself although in principle would not add any significant load effect, the suspended wirings could get noise by induction. In this case, I believe that reading the serial connection would be the
BradtheRad After I looked and learnt the generation technique for sinusiodal PWM signal. The topology I have chosen was half-bridge bi-polar MOSFETs which is controlled by analogue op amps. The source I wanted to use is 12Volts lead acid batteries. I also looked into the dead time which can be controlled by programming to avoid the porblem of s
Hi I would like to build a very simple mosfet voltmeter. Mosfet, so that it does not load the measuring circuit. It will use an analogue meter. Can I use the 2n7000 to build this ??? What if I want to also measure negative voltage as well? Shall I just connect the ground to the gate and the ne
I have an old analogue spectrum analyzer, that does not have any markers to measure things on the screen. How can I measure a signal level? A way I have figured is this: Input a second signal (apart from the first signal I want to measure) of known amplitude at the input of the SA. Then use the SA front end stepped attenuator to bring the level o
Morning all, I have been given a task to design a sensor that will amplify very low voltage signals from muscle electrode sensors. The device is battery operated and needs to be a very small PCB footprint. Specs: Input 10uV to 100uV (20Hz to 450Hz) Output 0V to 4.7V My question is should I use 100% ha
Hello, because of space limitation, I want to buy a USB oscilloscope and spectrum analyzer. My main interest is at HF work, so 30MHz analogue bandwidth at least. a 100-200MHz would be better so as to be able to measure harmonics as well. Which ones would you suggest for: 100-200MHz analogue bandwidth. scope combined with spectrum analyzer usb2 d
i want to design the OTA to enhance the linearity using this structure 128975 5 want he3* 5n this issue no any output appear in Transit
If you have analogue components in your Proteus circuit (such as an oscilloscope) Proteus will not simulate a PIC circuit in real time. This should be shown as a message in the simulation log.
i was thinking that a car battery charger with a big transformer would be a good start, use a 1A 5V regulator and a LM317 linear regulator with a big heat sink. Metering:- analogue are good but expensive, Digital meters are cheap but need a battery (DVMs cost from ?5 here in the UK). I think current overload is a must from the start. Something like
As far as I am aware, the analogue circuit design process is bound to start from very fundamental level and also needs layout and placement to be carried out unlike the digital circuit design. Therefore, it is certain that people are trying to come up with newer ways to complete analogue circuit design with more severe time and budge constraints li
Hello, What is the maximum permissible current enabled to enter to analogue pins of PIC18f4520 with no damage over PIC's functioning? Assuming a load of 0.3 A, I want to branch in series a current transformer, to be able entering the PIC porta pins. Can this connection be directly branched without any requirements of extra components (such
It all depends on the sensor you want to use. If it gives an analogue output based on the concentration of CO in the air, I suppose you could calibrate it. If the sensor is a threshold sensor giving out an alarm signal, it is normally only showing the alarm on/off status. You should also be aware that measuring the CO contents in the air also need
Hi all, I am using IL300 Linear opto coupler to isolate the analogue signals..Here I have attached the picture for four configurations of IL300..I m configuring my circuit as Non Inv input to Non Inv output... I have Designed my circuit for + and - 5 V as my supply.I attached my schematic design for your referance.And i got output at OUT1 as
The first thing to do is to amplify and limit the incoming signalls so they are logic levels square waves. Then there are a couple of ways to proceed, analogue or digital. The analogue way woulld be to use one edge of each square wave to transfer a known amount of charge, either by using two differentiators or a monostables. Then invert one
For maximum efficiency always use the largest possible grid size, this will depend on the components used and board density. For older style analogue using SOIC devices I will use a grid of 0.635mm if the board isn't that dense... for HDI analogue designs using full metric footprints to IPC-7351 standard I will use a grid of between 0.25 - 0.05mm
Whether to use more layers for analogue has nothing to do with signal speed and everything to do with signal integrity. These days multi layers are more common. - - - Updated - - - Depends on how well you want the board to work... If you go with 2 layers then try and get all the signals on the top layer and
What prevents getting gain & phase response in digital filters that is same (as an equivalent low-pass or high-pass e.t.c) analogue filter? I am aware that digital filters cannot get (both of) gain and phase response same as an analogue filter which has same cut-off frequencies. Usually the designer would concentrate on getting the gain relationsh