The wave tag has no wiki summary.
1
vote
4answers
199 views
How to Generate a square, sine, and triangle wave with DC input
I want to make a simple synthesizer as a start to audio electronics. I want to start with a simple square, triangle, and sine, which the user can vary the pitch.
Is there a simple circuit to do ...
-9
votes
0answers
43 views
radio wave transmition [closed]
Sir , you jest a simple fm transmitter. On the basis of this, I have some doubt.
A transmitter must contain a coil , transistor, variable capasistor,and an antina.
These itoms also depends on circuit ...
3
votes
1answer
255 views
How to apply the Barkhausen criterion in order to know if a system will oscillate?
How to analyze or apply the Barkhausen criterion for oscillation of the astable multivibrator below?
The criterion talks about the magnitude of the products in a loop must be equal to 1 (ideally)
...
6
votes
5answers
458 views
Suggestion to electrically disable a Faraday Cage
My plan is to ultimately develop an Autonomous Faraday Cage. The project seems very straight forward; however, I am unsure on how to effectively control the cage (turn on and off).
I have constructed ...
1
vote
1answer
88 views
Dump verilog array in gtkwave
Is there a way to dump the memory in verilog using vcd dump?
Since now i have written this:
...
1
vote
1answer
116 views
Wobble Bass LFO circuit with Op Amps
I am trying to build a LFO circuit that produces a wobble bass effect.
My overall plan is using an Op Amp to create the LFO and another Op Amp to create the low pass filter. How should I connect ...
1
vote
3answers
105 views
Trying to understand range and frequency of an RFID reader
I am trying to understand how range of communication between RFID reader and tag is related to frequency and power.
1- So if I increase frequency, the range will be shorter or larger? why? (I need ...
3
votes
3answers
364 views
How does an swr meter directional coupler work?
How does the directional coupler in an swr meter work? How are the forward and reflected waves separated out from the standing wave on the feeder?
I would like an answer in terms of sine (or cosine) ...
0
votes
2answers
186 views
How to create a square wave signal with 120MHz
What is a cheap way to generate a square wave with a frequency of 120MHz. I've been thinking of the following solutions:
* Use a Raspberry Pi, then use a timer or something from that board
* Use an ...
0
votes
1answer
143 views
Calculating what frequencies a dielectric can be considered perfect
I have a problem that is likely going to be on my E&M final this semester that my classmates and I can not figure out how to solve. The question is
At what frequencies can Earth be considered ...
1
vote
1answer
101 views
Antenna that can be used for large range of frequences?
Is there an antenna or device that can be used for WiFi, NFC, bluetooth, GSM for use with a frequency counter to measure the frequency of the waves?
-1
votes
1answer
96 views
Determing the Phase Angle of the following code: [closed]
I'm trying to determine the phase of xx after the code is run. You shouldn't need to actually run it to determine it however, as it is unclear on the graph. The two phases present appear to be (-3*j) ...
1
vote
2answers
471 views
Measure AC Sine Wave amplitude with ADC
I have created an AC sine way using a wien-bridge network.
I would like to measure the peak to peak voltage of this wave using my microcontrollers ADC.
I cannot just use this wave as an input to my ...
3
votes
1answer
187 views
Oscilloscope acquisition frequency
I have an FPGA design and the FPGA design has a signal called start which is always high. Here is how it works. I use the computer to send data over RS232 to FPGA, the start signal drops for a cycle ...
0
votes
0answers
230 views
Bandpass filter [closed]
I have drawn a bandpass filter for 833Hz and use microsim simulation to test my circuit. Does anyone know why sending in a sine wave results in a triangle wave as output? When i test it on my 50Hz ...
