A receiver is any electronic device that receives an external signal (e.g., radio, electrical or optical) and converts the information carried by them to a usable internal form.

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1answer
204 views

Why does this regenerative receiver not just turn into an oscillator?

I'm trying my hand at making a radio transmitter and receiver and I'm not sure exactly how this receiver works. I understand its a continuous wave receiver which is good for on/off transmission. I'm ...
2
votes
2answers
97 views

Designing shortwave radio receiver

I was building a receiver circuit ( superhet) for shortwave radio, primarily for 20m ( 14mhz) band. The circuit uses 3N211 or 40673 mosfet for mixer. However I have only these components available at ...
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1answer
49 views

Separate antenna for radio transmitter and receiver

I am building a HAM radio. Do I need a separate antenna for transmitter and receiver? I will be using 20m band and voice communication (No Morse code). My primary requirement is that I should be able ...
1
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0answers
59 views

How to transmit HDMI audio and video by wireless means [closed]

A friend and I are working on a project and we need to be able to transmit and receive wireless audio and video signals at a very fast rate. The most convenient method we can see right now is HDMI. I ...
1
vote
4answers
89 views

How do multiple transmitters and single reciever work?

I have multiple digital transmitters sending packets to an receiver, and packets from different transmitters may arrive at the same time, how can the receiver differentiate multiple packets at the ...
0
votes
1answer
59 views

Using filters to reduce bandwidth of received signal

I am doing some radio work, and I assume you can use a bandpass filter to reduce the bandwidth of a received signal. The application is modifying schematics for a FM broadcast receiver to a 5-25 kHz ...
1
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0answers
271 views

Audio + Video Transmitter + Reciever With 5 - 10 KM Range Circuit Diagram [closed]

I'm looking for a circuit diagram for a audio (doesn't have to be stereo) with video transmitter and reciever that has a range of more that 5 kilometers. I don't really have any limits on power ...
1
vote
1answer
49 views

What is this part? A958 960L [closed]

I have an optimus STAV 3200 (radioshack parts link) and this component labeled A958 960L blew itself in two taking a resistor with it. The parts list does not specify what the component is or what I ...
0
votes
1answer
84 views

Need a help with 3D Low Frequency Wakeup Receiver AS3933

I am software developer and I am totally new to circuits field. Can somebody help me to understand how the 125 kHz transmitter and AS3933 receiver works? This is the link where it says how it ...
0
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0answers
109 views

How to switch a transistor when a radio signal is received?

I have a circuit which switches on by sending current to the base of one of its transistors. I'm trying to make receiver which can receive signals from a AM transmitter and send current to base of ...
0
votes
1answer
59 views

Can we capture and reproduce the bluetooth signals

Are there any devices that can capture bluetooth signals and reproduce them? Or is it simply possible to capture bluetooth signals if we have any bluetooth device? Does a bluetooth device have ...
0
votes
1answer
399 views

Power LED's using RF transmitter and receiver with Arduino

I'm working on a project that I have two sensors, two Arduinos (a YUN and an UNO), two LED's, and an RF transmitter/receiver It's a pretty simple procedure: Activate a force sensor, send it via RF ...
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1answer
621 views

Boost 433MHz receiver module receiving signal (XY-MK-5V)

I am using some "no-name" (In Fact "XY-MK-5V" stands on the board) 433MHz receiver (and transmitter) on an Arduino project. I can receive the signals sent from my other Arduino very good (it sends ...
2
votes
1answer
155 views

How does a cube sat communicate with ground station with a 1w antenna

I heard that cubesat signals can be received with a hand held radio. Its confusing me that how a 1 metre antenna radiating 1watt energy can simply be received using hand held radios. I am designing a ...
1
vote
2answers
155 views

Hardware advice for simple wireless embedded application

Now, I am going to learn embedded programming in microcontroller. I am going to create a device that will receive signal from wireless transmitter. The range will be less than 30 meters. So, I have ...
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0answers
77 views

Bluetooth receiver from multiple transmitters

I need a bluetooth receiver to receive a signal from few transmitters. There is extremely little information about bluetooth on the internet. Google gives a lot of topics about android and iPhones, ...
3
votes
3answers
145 views

How in CDMA mobiles receiver gets unique code to decode its respective signal?

Transmitted data in CDMA mobile is encoded with a random code. Receiver requires this random code to decode data from the received signal. From where the receiver will get this random code?
1
vote
2answers
110 views

How does a capacitive receiver work for a fox and hound set?

I have been scouring the internet trying to find this answer, I've found hints and ideas, but nothing concrete, like an actual theory of operation. I'm making a fox and hound wire tracer for my final ...
1
vote
1answer
167 views

Using RF Link Transmitter/Receiver - ADC vs Microcontroller?

I have a sensor that gives off 4 volts when actuated and I would like to transmit it a distance to a light. So I found these RF Link Transmitter/Receiver at 434MHz: ...
0
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0answers
103 views

Want to convert IR audio from in car system to bluetooth

In my car (Renault Espace) I have a DVD entertainment system. This system uses wireless headphones with a 2 channel IR audio technology. I want to connect the audio from the DVD entertainment system ...
4
votes
1answer
207 views

Properties of a WWVB Receiver

In this article the author dissects a radio-controlled clock that syncs with the NIST transmitter, WWVB, in Colorado. The radio receiver seems to be a single integrated unit: Of special note is ...
1
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4answers
93 views

RF receiver to hear all carriers at once? (to hear electrosmog)

I would like to build "radio ears", a RF receiver that would allow me to experience the RF "smog" around us as sound in my headphones. A more sophisticated version of the cellphone-to-speakers ...
2
votes
1answer
230 views

Amplifying the signal from a transponder detection loop

Transponder I have a simple powered transponder which sends data using binary phase-shift keying (BPSK) on a 5Mhz carrier with a required range of 6-12 inches. It is used to time laps of remote ...
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1answer
230 views

How do I operate a tuner of digital satellite receiver using a microcontroller?

I want to operate this tuner of my digital satellite receiver. This is the tuner: They wrote some numbers and words around of the tuner: and the name and model of the receiver is ...
3
votes
3answers
1k views

Why the conversion to Intermediate Frequency?

While studying about various communication systems (Superheterodyne receivers and Television receivers, to name a few) I often come across blocks that convert RF signals to Intermediate Frequency (IF) ...
3
votes
3answers
305 views

Regarding Radio Frequency (RF) when a Receiver/Antenna Setup can receive DC - What Exactly Does that (DC) Mean?

I do not have a strong foundation in RF. I have been doing some research but I still do not properly grasp what it means if a receiver/antenna can do DC to X Hz. For example this Funcube Upconverter, ...
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2answers
1k views

Any wireless technology to find the distance between transmitter and receiver

I have a static transmitter and a mobile receiver. Is there any wireless technology to find the distance between the two in real time. Apart from using gps!
0
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2answers
107 views

Can a USB receiver be used as a USB drive?

I have an old Mini receiver for an old mouse and keyboard from Logitech and I was thinking if somehow it can be used as a USB drive to store some data. Could this be done somehow? If there is some ...
0
votes
1answer
104 views

How should a radio receiver be used to detect damage to concealed wiring?

Several structures hereabouts date back to the mid 1920s. Electrical wires were insulated by cloth winding, and embedded in Wooden Trunking With the passage of time the cloth rotted away in some ...
3
votes
3answers
421 views

Does an RF receiver constantly consume power?

I'm building a battery operated robotic arm and would like to use a cheap, short distance RF transmitter/receiver kit to trigger it. However I would like to know whether the receiver will constantly ...
4
votes
1answer
159 views

How do receivers know what to output to radio speaker or TV screen?

I understand that receivers are often used with mixers which take the sum and difference of two signals to make an output signal. How does a radio signal of say 102.5 MHz know to tell the speakers to ...
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1answer
269 views

GPIB transceiver IC with simple serial interface

I am building a device that I would like to add GPIB ability to. My device already has an MCU on-board that has a TTL 2-wire serial UART interface remaining available. I would like not to have to ...
1
vote
1answer
354 views

Building a cheap and stable microwave network analyser or oscillator (2-5GHz)

I am interested in measuring the changing dielectric constant of a liquid as it undergoes a process. My background research of scientific articles shows that the 2-5GHz range provides the best ...
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votes
1answer
226 views

Question about transmitter/reciever

I have built a transmitter/receiver with an antenna and crystal. I am wondering if it is stable. Here is my transmitter: simulate this circuit – Schematic created using CircuitLab Here ...
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2answers
523 views

How to make a Transmitter/Receiver [closed]

I am trying to make a transmitter and a receiver, I have two crystals and two antennas (basically a straight piece of metal with plastic covering), how could I make a transmitter and receiver with ...
2
votes
2answers
657 views

Is there any circuit like “Burglar alarm ” or “Proximity dector” with a range of 100 meters

I am in search of a circuit which works with IR or RF wave with a range of 100 meter to detect proximity or burglar. I need this to detect the presence of human or animals One thing important is i ...
5
votes
3answers
277 views

FM Receiver's Oscillator resonating to a frequency, but its modulated?

In an FM, the frequency is modulated. So whatever reaches the receiver is not a constant frequency. This being the case, at Receiving an AM/FM Signal: "In an FM radio, the detector is different, but ...
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2answers
263 views

What are the components needed for this receiver?

I want to build a simple crystal radio receiver. I do not want amplify the signal received. I want to detect the presence of a transmitted signal, and then use the presence of the received signal as a ...
0
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2answers
102 views

Can I turn a device on and off using an antenna and tuner? Do I need to amply the signal?

I would like to use a radio receiver to turn a device on and off. The idea is that when the signal is received, the device is turned on, and when the signal stops, the device turns off. I want to use ...
0
votes
1answer
174 views

What kind of Transmitter and receiver would I need? [closed]

I am trying to figure out exactly what it is I am needing, I am wanting to protect my chickens from my dog killing them! I want to place a small transmitter onto a leg band which will be placed ...
5
votes
3answers
284 views

What specific parts of a radio receiver use power? Does receiving the signal need the battery

Does a radio receiver need power from a battery in order to receive a signal, or is the power just used to amplify the signal? If you wanted to simply detect a radio signal of a certain frequency (not ...
7
votes
3answers
687 views

What is the most accurate and cheap way to figure out the distance between two points electronically?

For a project, I have an idea that involves getting a position for a person throughout a house. I am trying to figure out someway of triangulating the person's position, by having a bunch of little ...
2
votes
2answers
517 views

Should a fuse with the correct amps, but is physically too small, still power my stereo unit?

I'm not sure if I'm asking the right kind of question for this site. But if someone could help me, I'd be grateful: I blew a 125V 2.5A fuse in my home stereo head unit. I couldn't find that fuse at ...
2
votes
1answer
121 views

Video Transmitter/Receiver Books&Schematics [closed]

I'm looking to build a video/audio or just video transmitter and receiver for use in robots. I'm primarily doing it as an excercise, but I'd love to be able to get a range of 100-200 meters. I'd love ...
3
votes
1answer
353 views

A complete Radio electronics guide

I want to learn all the basics about making a simple radio project. The project is simple... One transmitting device (which only sends out analog signals of some decent frequency.. say 50MHz) and one ...
2
votes
1answer
324 views

DMX512 Remote controlled LED

I'm having a problem with this circuit. I am trying to get an LED wash light circuit to be remote controlled via DMX512. The problem is, after I designed the circuit for the RS485 (which will deliver ...
0
votes
1answer
1k views

RX String on UART not working

I am having some problems with UART communication with the RN-42 SM Bluetooth module. Currently, I am just using polling to get communication going. I have my source files below. The problems is that ...
0
votes
1answer
265 views

Multiple micro solar power wireless transmitters / receivers operating in close proximity? SRDs

Hi I have a few questions about a Tx / Rx idea. Description Approximately 10 transmitters and 10 receivers are expected to work in close proximity of each other. However Rx1 only receives information ...
2
votes
1answer
750 views

433Mhz Receiver

I'd like to build from scratch a 433Mhz receiver. Can anyone point me to a schematic or some material to learn how to build one? Google search didn't come up with much in the way of building one from ...
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vote
2answers
2k views

Is it possible to use 2-way walkie talkie to locate position?

Basically, given no GPS is allowed, can we use walkie talkie to locate the position of a car / a person? I am assuming the walkie talkie is using radio, not GPS-based. What equipments will be ...