The receiver tag has no wiki summary.
0
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1answer
57 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 ...
-4
votes
0answers
59 views
How to replace mains transformer on AV receiver? [closed]
I've been told an AV receiver (Denon AVR-1312) requires a new mains transformer and was wondering if it was an easy enough task to complete myself?
I have experience working as an IT technician and ...
-1
votes
1answer
101 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 ...
-4
votes
2answers
174 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
111 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
146 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 ...
0
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2answers
110 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
votes
2answers
84 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
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1answer
126 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
189 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 ...
6
votes
3answers
455 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
128 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
83 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 ...
2
votes
1answer
158 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
181 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
425 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
0answers
95 views
How to program for ALi Processors? [closed]
I'm trying to start to do some programming for my FTA satellite receiver, trying to solve some bugs on it. I know that the chipset/processor is ALi, probably this. My receiver is able to upgrade by ...
0
votes
1answer
210 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 ...
-5
votes
1answer
464 views
How can I make an ultrasound transmitter like that one? [closed]
Here is the target url http://allthingsd.com/20110602/demo-at-d9-ubeam/
I am interested in repetition of Perry and Dweck's charge system. I've seen the Power Supply, that they used, but I can't see ...
2
votes
1answer
570 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 ...
1
vote
2answers
535 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 ...
7
votes
6answers
4k views
ultra low power mini wireless transmitter / receiver?
I'm looking for suggestions for a wireless transmitter & receiver combination. I'm basically just trying to bridge several buttons over a wireless signal(s) (i.e. send a 1 bit signal) in as small ...
-2
votes
1answer
111 views
WLAN component to recieve and send messages (any programming language)?
i am looking for a component (unfortunately i dont know any name for it) which has a WLAN(preferred) sender and reciever. With which i can send from any device (whos in this net) some commands and ...
2
votes
1answer
996 views
arduino rf communication: beginner
I would like to implement a home-automation system on my arduino.
For this project I would like to communicate with the different devices by radio frequency.
So that would be different 433 mhz ...
3
votes
1answer
307 views
Can someone break down how this receiver works?
I'm having difficulty understand how this receiver works due to its size. It was taken from this site: http://jap.hu/electronic/rf.html. It is on top labled toy car receiver.
The toy car transmitter ...
1
vote
0answers
80 views
iSCSI RF-Receiver Control on Linux [closed]
I need to control a Watkins-Johnson Radio-Frequency Receiver through an iSCSI-adapter on Debian 6. What is the easiest way to achieve this? Most tutorials concern storage devices (disk drives) so I ...
1
vote
3answers
295 views
Connecting LED to RO pin of RS485 Transceiver
I am using this RS485 transceiver in a circuit of mine and I'd like to place a tiny 0805 LED in series with a 1k resistor coming off of the RO (receiving) pin. I'm hoping this would result in ...
2
votes
1answer
306 views
Walkie-talkie transceiver
I'd like to build a set of miniature two-way (half-duplex) radios that operate on the FRS band. It seems that transceivers for this band would be widely available. However I've not been able to find ...
3
votes
2answers
236 views
Need suggestion in choosing an effective wireless Transmitter and Receiver
My requirement is to transmit a binary form of data from one Road Junction to another road junction which is around 4 to 5 km away.
I am going to get the traffic information from each road in the ...
6
votes
6answers
1k views
Symbol rate (baudrate) estimation
I am looking for a algorithm that can detect the rate of symbols in a base-band signal.
The Gardner method is a way to cancel out the timing drift and synchronize the receiver to sender when the ...
4
votes
3answers
425 views
In a RAKE receiver, why is a Path Searcher needed? Can't the delays be found from the Channel Estimator?
I am a little confused, since the Rake Receiver has one finger for each multipath path, and the channel estimator models the impulse response of the channel and can be used to find the multipaths, why ...
1
vote
1answer
199 views
Modulation of 36 MHz wireless microphones
I've been given a handful of wireless microphones that transmit in the 36 MHz band, but unfortunately no receiver was included and proper receivers for that wireless mikes seem to be crazy-expensive.
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