Recent content by Neyolight

Hi Everyone I have a PICDEM 2 Plus board with a PIC18F4620 on it. My UART code is given. The code worked perfectly fine the first time i programmed my chip but stopped working after that. With Hyperterminal the error is : "Unable to open COMPORT 1. Please check your port setting"...

Heya Everyone :blushing: Im slightly confused as to how LC phase shift oscillator work ? Its a circuit consisting of 1 op-amp ( used as oscillator), 1 LC loop, few resistors. The op-amp has a reference voltage applied to the non-inverting end (+ve). The inverting end has a feedback...

Thanks for that vk6kro :smile: Im still a bit confused as to how that circuit works. Let me divide that circuit into 3 parts: 1) Oscillator: Does this provide the alternating current the LC circuit needs to oscillate at resonant frequency? Does it also modify the frequency as the L in the...

Hi all Here is the circuit that I will refer to: LINK : http://electronics-diy.com/lc_meter.php Ok my first question, Why do we need a voltage comparator (LM311) there? A voltage comparator compare the + and - voltages and output the difference?? What I want to do is, measure the inductance...

Hi All As the title of this thread suggest, I am looking for ways to recognize patterns in an analog waveform. Well the obvious answer to this question is use Artifical Neural Network (ANN) as ( from the text on google) its been used for pattern recognition and all sorts of stuff. I've been...

Inductive Loop Detector Technology: http://www.bircheramerica.com/industrial-door/loop-detectors.htm

Thanks vk6kro. I get your point. But what I am wondering about is- is it the way we interpret the magnetic profile of a vehicle over loop that causes the error / or the electronics in the relay? I have found that loops undercount and overcount a lot leading to errors- hanging on ( relay output...

Hi all Well I tried googling this but could not find a satisfactory answer , so here I am seeking help from all you experts :biggrin: So my question is regarding inductive loop sensors used on the road to give presence, vehicle classification etc information. These inductive loops are...

:approve: Absolutely Correct ! I looked up on that metal detector circuit and now I understand its working !

Thanks guys ! I am not an electrical engineer so I always choose a way with simpler circuits :-p That PLL and that metal detector circuit made me :rolleyes: But sometimes I have no way but to get my hands dirty with EEE stuff :-p I found an example on using MATLAB to get scope's frequency...

Thanks for such quick replies :) Ok I will explain in detail the purpose of this experiment. The LC circuit I made consists of a known capacitor ( 1nF) and an inductive loop (made by 3 turns of copper wire). I will make the circuit oscillate at its resonant frequency. Now when the circuit is...

Heya Everyone Ok so my question may seem a little silly but nevertheless I will ask. I need to know what you experienced engineers think about it. I have a series LC circuit (on breadboard) - connected to a function generator ( 2V p-p, 1kHz) - I will connect an oscilloscope across the...

Thanks berkeman and es1 The issue I have with the loop is that it just does not detect fast moving vehicle. I don't know why is that. I would be doing some experiments with a real inductive loop myself shortly and hopefully will figure out the reason behind it. :)

Heya Everyone I decided to do some experiment with an LR circuit. I have an inductor in series with a resistor connected to a function generator. I will set the frequency to the resonant frequency of the circuit. Now, I will change the inductance of the inductor by bringing in a conductor...

Hello Everyone I am currently studying the inductive loop detectors used in the traffic control department. I believe the data from the detectors is highly unreliable and noisy. A lot of research has been going on on the 'Fault detecting algorithm' and other means to improve the accuracy of...