Using other than a wired connection to transfer signals or power. Includes optical and (ultra)sound, but most often refers to RF (radio-frequent). Distances can be as low as centimeters (e.g. RFID), there's no upper limit.

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0
votes
1answer
31 views

Bluetooth Headset to Bluetooth Transceiver

I have a little bit of experience with Bluetooth and Arduinos but I was wondering if anyone might be able to tell me if it is possible for a Bluetooth headset to be linked to a Bluetooth transceiver ...
0
votes
1answer
49 views

2.4GHZ US Wireless Device in EU [on hold]

I want to buy the Fishman Triple Play (a 2.4Ghz wireless guitar hex to MIDI pickup) and there are two versions, the US one and the EU/UK one. The US one is loads cheaper and I live in Malta (Europe) ...
-1
votes
0answers
35 views

Wirelessly distance measurement? [on hold]

I am trying to measure an object less than 30 meters away with relatively high accuracy. the environment may be somewhat un-predictable (outdoor, obstacle etc), what are some of the best options out ...
0
votes
2answers
34 views

How to simulate Wi-fi signal strength indoor environment?

I want to simulate Wi-fi signal strengths received by a mobile moving around in X m3 that contains N access points. I must take into account the effect of walls and if possible the effect of moving ...
0
votes
0answers
22 views

CDMA Chip Sequence Sending and Receiving [duplicate]

In CDMA, every user has a sort of signature (chip sequence number). When we apply the signature on the receiving signal, only the intended person's signal is extracted from the total signal. But my ...
1
vote
2answers
44 views

WiFi and collisions

since all WiFi operates in the same frequency which is 2.4 GHZ , if we set a certain number of access points in the same Region , for example , the maximum distance between them is 15 meters , could ...
0
votes
1answer
60 views

Controlling an ATmega328P via Wi-Fi

I am a software guy who hasn't been under assembler level. I have a project in my mind but I don't have sufficient knowledge on electronics. I have been searching in the internet for help, but I ...
0
votes
1answer
28 views

Wireless DC Motor Speed Control

I am looking at purchasing this 24V 110RPM 1amp DC motor with a speed controller like this one that the listing recommends. I have been doing some research into controlling linear actuators via ...
1
vote
1answer
57 views

RF transmitter connected directly to sensor

I am trying to implement the following : I got 2 (more than 1 anyway) distinct sensors and an arduino and I need to get the sensors' state wirelessly. Here is what I have thought of so far: As for ...
0
votes
1answer
38 views

Wireless DC Motor & Linear Actuator Control

These are the 2 items that I have: 24V 110RPM 1Amp DC Motor. 24V 100mm Linear Actuator. First Question: To run the DC Motor I am thinking of getting this 24V 2A power supply in the hope that both ...
0
votes
1answer
96 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 ...
4
votes
1answer
698 views

Permanent magnets near wifi device

Background I have a small circuit that consists of a microcontroller operating on 14Mhz and a wifi module. This circuit is enclosed in a small plastic box. I am considering gluing a few magnets on ...
1
vote
1answer
43 views

How to turn a wired dimmer into a wireless one? [closed]

I'm working on a personal project for residential automation. I want to make a wireless Arduino controlled dimmer. I followed this tutorial and I made my dimmer, but it's wired. Below is the circuit ...
-2
votes
1answer
62 views

Appropriate electronics to use for scoring closest Nerf football air cannon shots? [closed]

Appropriate electronics and sensor technology to use for scoring closest Nerf football air cannon shots? The general concept would be to have a target area marked on the ground around a target device ...
0
votes
0answers
24 views

Does ZigBee require an uniform transmission power?

Reading a book about Wireless Sensor and Actuator Networks, i came across the following sentence (highlights by me): A common transmission radius is normally preferred because medium access ...
0
votes
0answers
59 views

Reason for choosing particular frequencies for ISM bands

There is a number of ISM bands, including the widely used 2.4 GHz. But which were the reasons for the FCC and ITU to pick those bands? I suppose, that with 2.4 GHz there's a connection with water ...
2
votes
2answers
115 views

More transmit power for 433MHz transmitter module by increasing voltage

I am using these 433MHz modules. According to the product information, I can supply the transmitter from 3-12 Volts. I am sending the data from an arduino (5V data) and want to power the transmitter ...
6
votes
3answers
430 views

How does this wireless transceiver work?

While messing with Arduino I came across this wireless transceiver. As a newbie in all this stuff, it's written that it operates at 2.4 GHz, so the transmitter crystal and receiver crystal must ...
1
vote
2answers
135 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 ...
0
votes
1answer
34 views

Can you implement a control algorithm and send the inputs via xbee?

I know this question is little bit vague, but let's say that I have a robot or a quadrotor to control. I want to implement the control algorithm (PID, robust, or LQR) in the PC not in the robot/quad, ...
-1
votes
2answers
84 views

Is there such a thing as a wireless solid state relay

I want to control multiple baseboard heaters in my house, but I don't want to put a raspberry pi connected to a solid state relay behind each baseboard heater, or even connect it to the thermostat, as ...
3
votes
3answers
123 views

Xbee Transmitting garbage characters

We tried to make two Xbees communicate with each other. One Xbee module(configured as transmitter) is connected to one PC (PC1), and the other Xbee module(configured as receiver) is connected to ...
2
votes
0answers
54 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, ...
1
vote
1answer
65 views

Miniature wireless distance sensor

I am novice in electronics, so please bear with me. I am searching for a small distance sensor (as small as possible) that I can use to measure a distance between 0 and 30 cm precisely (precision ...
1
vote
1answer
43 views

Why use IEEE 802.15.4 over WiFi?

I am researching about the deployment of sensors within smart cities; If I was to place an sensor unit on a row of street lamps, then have a main street 'router' that allows these sensors to upload ...
0
votes
0answers
25 views

block diagonalization of MIMO channel using SVD

I'm trying to follow this example from a textbook about how to do block diagonalization of a wireless MIMO channel. I've got the SVD of the matrix from Mathematica, and get the correct singular ...
0
votes
1answer
82 views

USB-TTL problem connected to my UART-WIFI module help! [closed]

A question is one to regulate that there warms up very much the chip of my usb-ttl that this feeding to my module uart-wifi as sample in the figure. That can be the problem helps. PL-2303HX ...
0
votes
3answers
77 views

Linear potentiometer for suspension travel

I am working on a project for university measuring the extension of a cars suspension. I have a potentiometer available to me, but have a few questions regarding how to use it. I understand that it ...
1
vote
2answers
215 views

Signal jammer vs scrambler [closed]

From what I understand, both of these things inhibit electronic devices from communicating with each other. A scrambler does this by altering the signals sent out by the transmitter device in such a ...
0
votes
2answers
86 views

Modelling large air gap transformer

I am trying to model a wireless energy transmitter as a transformer equivalent circuit with a large air gap. Because of the large air gap I’m assuming that for a realistic model fringing fluxes would ...
0
votes
1answer
52 views

Building a wireless door opener [closed]

In my parents house, the door is 'unlockable' via a switch. As long as the button is pressed, the door is unlocked. Since I often forget my keys, I thought to make a WLAN-Switch, which is controled ...
1
vote
1answer
73 views

How do I send accelerometer (ADXL335) signals (x, y and z) via xbee?

I want to send the signals from a 3 axis accelerometer (ADXL335) to a PSoC3 via Xbee modules (S2). What configurations do I need for each Xbees and can I send each of the signals (x, y and z) ...
11
votes
1answer
235 views

Why does the 802.11 wifi spec allow for 11 channels?

The general wisdom is that it is better to only ever use channels 1, 6, and 11 as they are the only three non-overlapping channels for 2.4ghz wifi (in the US), and two adjacent networks on the same ...
1
vote
0answers
50 views

Why does the QI charger I recently bought only charge for a couple of times? [closed]

I recently bought a QI compatible charger for my Nexus 5. On the box it states, that the wireless charges up to 500 times. I don't understand why the charger is only able to charge my phone 500 times. ...
0
votes
0answers
21 views

motorola smbobol scanner secerts [duplicate]

Is it possible to convert a motorola symbol 9060 wireless barcode scanner into a rfid proximity scanner that will scan smart cards from a distance or close proximity
2
votes
1answer
106 views

Wirelessly power multiple LEDs with antenna?

I'm working on a project that requires me to build an antenna and I'm not very experienced with wireless transmission. Here is an overview of my project: Four parking spots for cars with pressure ...
2
votes
1answer
136 views

Solar and battery for small usb camera

As the title suggests, I'd like to power a Dropcam without laying new wire in our community garden (code enforcement makes wiring a headache). When I wired my Raspberry Pi to work off solar power it ...
1
vote
1answer
65 views

adafruit rf m4 as a ground switcher

I have a store-bought battery powered LED light assembly that is controlled by a microswitch. The light is installed in a hard to reach place so I wanted to hook it up to a cheap ASK wireless ...
2
votes
2answers
398 views

What type of antenna does the Xbox One controller use and how can you disable it?

I recently cracked open an Xbox One controller, the impetus for doing so was two-fold: First and foremost the engineer in me likes to see how things work under the hood as I learn a great deal that ...
1
vote
1answer
101 views

how do I connect a BN59-01006A samsung rc to an Arduino Uno IR receiver module

I have this remote control (BN59-01006A): and this IR receiver brick(Keyes IR receiver): I managed to connect the IR brick to my Arduino Uno. I downloaded this library and used a basic Arduino ...
1
vote
1answer
190 views

Keyes IR receiver with Arduino

I'm trying to learn how to connect an IR Receiver to an Arduino Uno. I got this IR receiver as a gift, and I'm having a hard time finding a spec. sheet anywhere online. The module looks like this: ...
1
vote
1answer
91 views

What's the difference between uIP, lwIP, 6LoWPAN?

I just started to work on a wireless sensor network project and encounter these three terms: uIP, lwIP, 6LoWPAN. Since I'm new to this area, could anyone please explain the differences between these ...
0
votes
0answers
39 views

sending data with cc2510

Hy, I'm trying to send simple 1 Byte package with cc2510dk-mini. The idea is to press button on on device and the led on the other lights up. I'm stuck with the problem, when I try to send data, radio ...
14
votes
4answers
716 views

How come radio signals don't interfere with each other all the time?

I'm a newbie on wireless technologies and I'm trying to understand how they work. One thing I don't understand is this: How come transmissions from different devices don't interfere with each other ...
0
votes
1answer
319 views

How to connect a Printer WIFI module wires to an Arduino?

+ I’m a digital artist, found this HP printer on the street and wanted to use its components (motor etc.) on my projects. I was wondering if any of you know if I can use this WIFI module to ...
1
vote
3answers
282 views

Home Current Meter - is this a good solution?

I want to build a simple current meter to measure my power usage at home, and have the data sent to my blog's database. (I know there are similar solutions out there, but this project seems engaging ...
2
votes
1answer
52 views

Wireless sensor for location in remote wilderness

I am using a 150 ft net to try to catch a large fish. I have buoys that I would like to monitor. If something big gets in net, it will form a V. The location is very remote (true wilderness and NO ...
2
votes
3answers
123 views

How to receive faint AM light

I am going to be amplitude modulating a high power LED light from a peak on a mountain. I want to recieve this faint light as far as physically possible before the light fades out too much to recieve. ...
2
votes
2answers
86 views

Android to arduino- best board option for wireless [closed]

I'm a novice arduino hacker. I need to connect a hacked Android to an arduino wirelessly but unclear as to which option is best. I've read about the Mega ADK and it is my understanding that a regular ...
2
votes
2answers
240 views

Updated. Extending Range of a microstrip antenna with a SMA 2.4GHz Omni Direction 20db wifi antenna

Dear all I have the bellow A2DP bluetooth module which has a zigzag microstrip antenna. I want to extend the gain in the antenna with my 20db wifi antenna. I know as far as that I need to scrape the ...