Questions tagged [detector]
The detector tag has no summary.
151 questions
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Photodiode not registering pulses (BPX65)
I'm trying to capture fast light pulses using a photodiode and came across this circuit from here:
I replicated the setup using:
50 Ω resistor as the load
100 nF decoupling capacitor
UF4004 diode
...
- 353
-2
votes
1
answer
104
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Amplify calls in proximity to detect cheating devices
I have used a device that is used to detect cheating device that students use to call a person outside using GSM, i first assumed that the device simply detect nearby RF signals that falls within the ...
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0
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79
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Spread spectrum question
I am doing some experimentation with spread spectrum with and the results are confusing me.
Here is the graph in question. All measurements are done using CISPR QPK detector with the same RBW and ...
- 708
2
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0
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69
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Question about EMC Radiated emissions detectors
I have a question regarding the measurement performed at a lab.
Regarding the first measurement they are stating that the resolution bandwidth is 120kHz and the measurement time is 15seconds. Does ...
- 708
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2
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99
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I want to use spark gap transmitter as a remote trigger to D.C circuit electromagnet Bell?
I want to make the spark gap in the DC electromagnet bell remote. My spark gap transmitter has a 60kHz pulse frequency, using only an inductor and capacitor for the resonant frequency. Is this enough ...
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1
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How does the "Piranha PDVT 1609" voltage detector sense DC voltage?
Recently, in my house repair
an electrician used single terminal device "Piranha PDVT 1609".
It was not only detecting AC but also but also DC for example 12V DC.
It's a single terminal ...
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2
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2
answers
119
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Contactless AC Detector Powered from the Grid
I'm a newbie in electrical engineering, and I'm working on an IoT project where the IoT board is wired to a relay that can turn a load on and off. To make things more interesting, I want to notify the ...
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2
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111
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Placement of ferrite choke in detector circuit
While reading through the RCA Receiving Tube manual, I came upon this circuit:
This is a tube-based grid-leak detector for a radio. Why is the RF choke placed in the signal path rather than '...
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1
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248
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Automatic gain control and Tayloe detector
For a recent project, we need to build an RF IQ frontend to detect tones at 500kHz sent by a nearby transmitter. We want to use the Tayloe IQ detector followed by baseband ADC conversion to be able to ...
- 111
1
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0
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174
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PIR Circuit Problem
I am using D203B model of PIR and I used the circuit that was suggested on its datasheet (first pic). I do not know what the problem is, as the output (pin the 8 and 14) of op-amp (LM324)is always on (...
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1
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What could the strange noise in the images be due to? They appear to be composed of 8x8 squares, and many of them contain different patterns [closed]
The question may seem silly, but I am curious about the structure of images from a certain biomedical image dataset.
If you enlarge the following image fragments, you can see that they consist of 8x8 ...
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0
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52
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Idea needed to design spike detection
In our electrical workshop, they gave us to design a spike detection telling that later on we will be given a eeg signal as input to our circuit, so we had basic idea that first need to pass it ...
- 11
2
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2
answers
187
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Potential issues with an alternative charge amplifier op-amp circuit?
Sorry in advance for a long question. I'm working on designing some pre-amplifiers to amplify signals from a Multi-Wire Proportional Chamber for a nuclear physics experiment. Each signal from these ...
- 31
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1
answer
1k
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EMC Radiated Emissions, peak vs quasi-peak
This is regarding some Radiated Emissions testing unintentional radiator:
Critical frequency is at 314.986 MHz
Polarization is Horizontal
Peak detector is 53 dBμV/m
Quasi-Peak detector is 56.68 ...
- 708
6
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4
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981
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Doubt about the capacitor in a equivalent circuit (ion chambers)
I'm delving into the topic of ionization chambers, but as someone without a background in electrical engineering, I'm finding the equivalent circuits a bit challenging to comprehend. Specifically, I'm ...
- 163