Signal strength?

We have a satelite dish on the roof for sending and receiving email. It is called Surfbeam . How can we use the computer to check our signal strength. Our house is settling and they want $100. to send a man up with a meter he uses on the roof. How can we do it. We have electronic knowlege and am an Amature Radio Operator. Please help

Question by emit 9 years ago  |  last reply 3 years ago


Signal Indicator?

I'm trying to make a simple transmitter/receiver setup to use in airsoft to keep track of the distance (not worried about direction right now) between me and whatever the transmitter is planted on. The transmitter can send out a steady signal or pulses, and the only problem I have is how it will show the distance. I have a line of LEDs that I want to set up so that more light up the closer I get to the transmitter, but I don't know how to rig the setup so that it displays signal strength (I would think that the closer you are the stronger the signal). Does anyone have any idea how I can do this or perhaps better alternatives that accomplish the same thing?

Question by pyrorower 9 years ago  |  last reply 9 years ago


integrate signals? Answered

Hi i have square wave start 5 then 0  picture 1with variable duty cycle i want to convert it to the signal in picture2i did integration in picture 3 but didnt invert the signal .

Question by britich 5 years ago  |  last reply 5 years ago


Convert sound signal to dry contact signal?

This might be a bit of a strange question, so will try and word it so someone can follow along. I posted a thread previous about getting my doorbell chime to work with SmartThings.  What I now have is a sensor with external input.  The keep it simple, there inputs are GRND and IN.  When the 2 inputs are joined, the device reads CLOSED and when they are apart, the device reads OPEN...perfect. I've been trying to find a point on my Chimes circuit board that would create a dry contact between 2 points to trigger the sensor, but I'm not having a great deal of joy. There are however, 2 wires running from the board to a speaker in the unit.  Is there anyway I can get convert the signal to the speakers into a signal which would connect the 2 wires? I know a speaker is an electromagnet that responds to electric signals, but wasn't sure if there was something preventing the contact being made between the 2 sensor wires

Topic by K20Evo 3 years ago  |  last reply 3 years ago


Wireless Turn Signals

I have toyed around with the idea of making a jacket that has the turn signals and/or brake lights on the back. However, there is a twist, I would like to see a controller box to wirelessly send the signal from a scooter to the jacket. When the turn signals and brakes are used on the scooter it sends a wireless signal to the controller in the jacket which relays that to lights on the back of the jacket. I've seen some jackets with lights wired on to them controlled with an arduino.

Topic by partyone 9 years ago  |  last reply 9 years ago


How to make a working colour light signal for model railways?

Hi everyone, I am looking for advice, as to how to make a working colour light for my model railway using LED bulbs? I want to connect it up so I can swich the signal from red to green and vice versa.

Question by paul Fast post 3 years ago  |  last reply 3 years ago


homemade signal booster? Answered

I was trying to figure out how to boast my signal coverage in my area, and a got an idea: to use a UHF amplifier, to pick up the towers signal and rebroadcast it. of coarse since things like WiFi, Bluetooth, and cellular 2G/3G/4G networks use two way radio, the signal can go back to the reviving end of the UHF amp, and get broadcasting to hit whatever tower. my phone should better recognize the tower, as if i just magically made a tower 2 feet away. however this might also amplify stay noise. if this idea doesn't work, why not? i think i am going to need at least a 20dB increase in power, but as of now i  need to do more research. but if i can buy a product that does a similar thing for less than $40, i would. http://en.wikipedia.org/wiki/Dead_zone_(cell_phone)#Dead_zones  http://en.wikipedia.org/wiki/Repeater http://en.wikipedia.org/wiki/Wireless_spectrum (cellphones use UHF spectrum) http://en.wikipedia.org/wiki/Signal_booster

Question by -max- 6 years ago  |  last reply 2 years ago


signals for Model railways

I made the signal. I will show it soon.

Topic by paul Fast post 3 years ago  |  last reply 4 months ago


Injecting signal into a cable

For a part of a project on Power theft detection on a cable, i needed a way to inject a signal on a cable. Can anyone please suggest a method inject the signal. The signal is a pulse generated by a function generator.

Topic by killswitch123 7 years ago  |  last reply 7 years ago


Lost Gps Signal

I want to map out a mountain bike trail with lots of trees and valleys. I can't get a signal with my GPS. Any suggestions to boost the range?

Topic by dogsrcool2me 12 years ago  |  last reply 12 years ago


Wifi Signal Booster

I was wondering if old cellphone can be used as a wifi signal booster ? If yes what are the instructables. I am curious to know about it if it has not been tried yet i would like to get the guidance.

Topic by SamaritanWonders 8 years ago  |  last reply 8 years ago


Blokcing WIFI Signals

I am researching materials to block wifi signals. I´d like to find the best ones in order to avoid being hit by those wireless killers. Anything that can be of help would be greatly appreciated. Thx

Topic by bytor70s 4 years ago  |  last reply 4 years ago


signal following robot? Answered

Hi community, i would really make a robot that follows a signal maybe wifi signal the idea is to keep a small chip (transmitter) in my pocket and the receiver would be installed on the robot body or the reverse, so the robot would follow the signal,  and im really thinking to use a tank body ( not wheels) with two  motors that will drive body  just as a tank or Caterpillar digger concept So can the community experts help me how can  i realize my dream, and tell me what could be the parts and how it would work?? Thank you so much community you have been always helpful ! 

Question by vwtm2006 4 years ago  |  last reply 2 years ago


Audio signal help? Answered

I was going to build Amplifier with Gain = 20 Minimum Parts From this datasheet But I have no Idea how to put the signal on. I think that the signal is Vin (pin 3)  but that is one cable when a headphone has three cables. I know the red wire is right and the blue is left and the other is comm so I onley need 2. Because there is one input I need to make it one cable. Would this work (I will test what resistor I need with a voltmeter later). If I am wrong about there olny being one input can someone explane to me how to wire it.

Question by David97 7 years ago  |  last reply 7 years ago


741 Signal amplifier Answered

How would I go about creating an amplifier using an LM741 to amplify a 0mv-400mv signal to a 0v-4v signal? All the circuits from google or textbooks don't work, or produce strange oscillations. The only way I can get it to work is in inverting mode, where I can get -4v-0v out, which isn't very useful. My specific application for this is for a digital thermometer. I intend to amplify the 0-400mv analogue signal from an LM35 linear temperature sensor, then somehow sample that without using loads of logic or transistors and convert it to decimal or binary, then drive a dual 7-segment display to show the temperature. I have a prototype made using 20 comparators and 10 xor gates, and countless diodes, so if anyone could advise me on an easier way to do that, that would be great. And no PICs/AVRs, I know how to use them and have programmers, but I prefer to do "real" electronics using CMOS chips.

Question by andy70707 7 years ago  |  last reply 7 years ago


Is it possible to homothetically dilate a signal?

Imagine I have a very short signal that I would like to observe, however the frequency is too high for simply viewing it on an oscilloscope. Is there any possible way to "dilate" it over time? Obviously, I am not talking anything digital, probably some crystal retranslation...  Somehow, I haven't managed to find anything using the most obvious way (googling), but, probably, I don't know how to.

Question by gruffalo child 5 years ago  |  last reply 5 years ago


Trouble using In Line Signal Amplifier

I am trying to install an in line signal amplifier for my satellite, which I hope will increase the signal strength. However, when I finish installing the amplifier the signal is totally blocked. Dose anyone have any ideas on what I am doing wrong?

Topic by Sedgewick17 10 years ago  |  last reply 10 years ago


change old traffic signal to LED and house circuit?

The light is a single 3 light signal. Want to rewire to LED with a variety of light possibilities and be able to plug into house current.

Question by Needtoknow1 9 years ago  |  last reply 9 years ago


Is it possible to connect a usb cable to a laptop Wlan card and attache it to a dish for a stronger wifi signal?

I want to be able to take the mobile card, water proof it. Attache it to the back of the dish, run an antenna from the front also connected to the the cable with a power hookup. The idea is to raise the wifi signal as well as place the unit anywhere in the house to get a strong db. I was in Puerto Rico a few months ago and because the homes are sometimes built into the side of a hill the signals are weak. This challange should be easy but cheap and can be built with things that are availiable.  Broken computers, wires, discarded sat dish and batteries.

Question by psbcarlos 6 years ago  |  last reply 6 years ago


Hey guys I use the USB720 dongle from Verizon for my internet connection. It picks up a signal from cell towers.x

Hey guys, I use the USB720 dongle from Verizon for my internet connection. Lots of time the signal is poor. Would one of thesehelp me get a stronger signal? Thanx, Bob V.

Question by the hoof 10 years ago



how do let roomate use signal from my sprint internet card?

Like i got this sprint internet usb and it gives me internet but no one else i have tryed to pick it up on roomates computer with linksys network adapter with speed booster i have two of them and a netgear 54 mbps wireless router wgr614v5 which i plugged into my computer(desktop) and tryed to bridge the signal with my sprint card so i can pick it up on roomates computer with the linksys network adapter but no luck not sure how to do it but would like to know could someone out here please help me wit this signal prob or mabye even suggest a better way of doing this again thank you for listening

Question by ghost420 9 years ago  |  last reply 9 years ago


I need to remotely turn on and off 55 tvs in school classrooms. How can I build an IR system for this? Thanks, RM

I want to build a hardwired IR network in the school building to each of the tvs. What all components would be needed and how to assemble these components?

Question by 10 years ago  |  last reply 10 years ago


Model airplane problem

I need help.  My neighbor is dive bombing people on horseback with his model airplane.  He is going to get someone killed.  I've tried to reason with him and have spoken to the police.  I'd like to see if there is a way to ground his plane when it comes on my property while I work on a nuisance/trespass case.  Yesterday he was flying it 6 acres in my property right over people's heads while they tried to ride.  I don't mind him flying it but doing flips etc on my land is unacceptable.  Please help!!!

Topic by Ewindsor 6 years ago  |  last reply 6 years ago


How to change a 433.92 MHz signal in to a 434 MHz signal?

Hi,I have these remote controlled wall outlets (Brennenstuhl Funkschalt-Set RCS 2044 N Comfort). And I'm trying to make an arduino circuit with an RF transmitter so I can switch them on and off without the remote.I sniffed the signal from the remote with an RTL-SDR and found out that the signal frequency is 434 MHz. So I went online and ordered an 434 MHz transmitter (from sparkfun).After I hooked the transmitter to my arduino and wrote the code with the exact same signals as the remote had send out. I tested the circuit and saw that it didn't work.So to see where it went wrong I also sniffed my signal from the RF transmitter, to see if it's the same as the one from the remote. And I found out that the frequency of my 434 MHz transmitter is actually 433.92 MHz.But this turned out that it wasn't a mistake. But the chip in the datasheet even says that it is 433.92 MHz. And when I went online to find a real 434 MHz transmitter I couldn't find one, because all the 434 MHz transmitters that I found were also actually 433.92 MHz.So then I tought how the hell has my remote a 434 MHz transmitter if I can't find one? And I screwed it open and saw in the casing that even the transmitter of the remote is 433.92 MHz. But for some reason it sends out a 434 MHz signal. So it must have some kind of circuit inside that modifies the 433.92 MHz to 434 MHz.And now my question to you is: How can I do that? How can I modify a 433.92 MHz signal to a 434 MHz signal?Thanks in advance!(I uploaded some pictures of the remote, the wall outlet, the RTL-SDR, the RTL-SDR captures on my laptop, The (simple) arduino circuit and the transmitter module)

Question by piet_lu 1 year ago  |  last reply 1 year ago


How do you make a tv signal jammer?

I want to know how to make a signal jammer. Thanks! :)

Question by Zephyr Wind 8 years ago  |  last reply 3 years ago


cell phone signal booster , basements, brick walls?

How can I put a homemade cell signal booster together for my basement apt.? what will be needed for the frequencies adjustment? Can I use an old rooter or ?

Question by JasonM7 4 years ago  |  last reply 4 years ago


can i increase my internet signal by using a tin can?

I have a inter network established on the outside of my house. But it won't work on the inside of my house. All I can see is the view internet signals available and that network is on there but on the inside of the house it shows limited concetivity. I heard that you can increase a inter net signal using a tin can? Yes I do have a booster but it still only gives me limited connectivity.

Question by rickeyd412 9 years ago  |  last reply 9 years ago


What's the best way to boost the wi-fi signal coming from my wireless route?

My wireless router is in my basement and I have an iPod touch and an xbox 360 that I would like to get a better signal for.

Question by cbuzzard 10 years ago  |  last reply 9 years ago


Measuring a Bluetooth modules output? Answered

There is a serial Bluetooth module that I have used before on an Arduino project but now I'm trying to use in a project without the Arduino. Basically I need it to be an electronic trigger, I don't care really what the signal is just how long and the voltage and current. There are 4 pins on the module: Vcc, GND, Tx, and Rx. There are 2 open pads: Key and State. When I send a command from my phone the module sends a signal out the Tx pin, and it is this signal I would like to measure so I can pick a command with an appropriate signal and tailor the rest of the circuit accordingly. I tried a voltmeter between Tx and GND but saw no signal on any level measuring DC. Is there something I'm missing? Is the signal more complex or different, or is that test setup flawed? I tried other combinations, Rx-GND, Tx-Rx, RX-Tx, GND-Tx, GND-Rx but saw nothing.

Question by bwrussell 6 years ago  |  last reply 6 years ago


is it possible ?

Can  i import a router wifi signal from 7/10 of a mile away when you have to be within 100 feet to get it on a laptop without any antenna or other aid?   thanks, dsrtdwlr

Question by dsrtdwlr2 8 years ago  |  last reply 8 years ago


CB Radios and Relay Towers

`A buddy and I have portable Citizen Band Radios and we were kinda wondering what cool stuff we could do with it. Also we want to try and build a simple Relay tower to be able to talk to extend the signal. How would we go about doing this?

Topic by Incelism 11 years ago  |  last reply 6 years ago


I bought one of the Harbor Freight 4 camera video surveillance systems to keep an eye on my driveway and yard.

Two problems arose. 1. Cable distance. "Tech support" says the 'cables' can't be more than the 60' that comes with the system because of loss of signal...( obviously never heard of Instructables.com)....The wires in question are very thin <1/8" with RCA and power connector on one end, BNC and power connector on the receiver end. Can I adapt the RCA camera up to exterior coax and run a larger 12V power cord alongside the coax, then convert the video signal back down to the BNC connector and achieve a 'boostable' signal? 2. I have solar panels and 12 volt batteries throughout the property, sheds and garage. Would I be able to just power the camera locally instead of running a power cord from the receiver power supply to the camera?     And.. what's a BALUN? Thanks

Question by GrumpyOldGoat 8 years ago  |  last reply 2 years ago


hai my rc car receive the commands only when .........................................................?

Hai my rc car receive the commands only when the antenna of the transmitter touches that of the carpls help me to solve this ineed my car to go far?

Question by liketodrift4 8 years ago  |  last reply 8 years ago


I need a good instructable in the use of Winrar to open a ziped folder fo Eagle. Any help available. kbyrne?

I have the Eagle program. At the cadsoft web site are library parts to download but they are ziped ang winrar is supposed to be used wit this but I am new to computers and have winrar but need a good instructable fo this. I also need a istructable in adding a part from scratch. I have the instructable to add one from a tech sheet. The parts I want to load would be audio integrated amplifiers. thanks kbyrne6925@gmail.com

Question by kbyrne 8 years ago  |  last reply 8 years ago


trigger signal for video line

Hi, I'm having a project which need to send trigger signal to oscilloscope. i should make a circuit that will allow me to trigger oscilloscope on specific lines in a video signal. Please give me some idea so i can go ahead. thanks in advance

Topic by sofia14 4 years ago


Mobile phone signal Detector

I want to know if there is any 'mobile phone signal detector' already available in the market. The purpose is to find if anybody is using mobile phone for calls or messaging at restricted places. Jammers are not fine as some are exempted from making calls etc.. If there is nothing like that available, how to make one to detect the signal or even the phone from which the signal was emitted. Usually when we are about to receive a call or sms and if we are near a Speaker we get a specific noise through speaker, or if we are near a monitor (CRT) it flickers.  So I am sure there are ways to find this signal emission. Please suggest the options to do this....

Topic by donjoy 8 years ago  |  last reply 6 years ago


What is sending out the signals ? Answered

Hi, I opened up the remote controls of my old alarm system ( those reed switch ones) hoping to find some IR LEDs. But I got this instead, no IR LEDs. Can anyone tell me which component is sending out the signals ? Thanks in advance.

Question by fujiapple 9 years ago  |  last reply 9 years ago


Turn Signal Bike Jackets

Looks like Leah Buechley has been busy making even more Turn Signal Bike Jackets. From her Flickr post: on the steps of Shih Chien U, prototyped by me w/ parts from the taipei electronics markets & made by (awesome) Shih Chien University fashion students via CRAFT

Topic by fungus amungus 9 years ago  |  last reply 9 years ago


Logic signal conditioning question?

I a robot i am building, i need to condition the signal as follows with any Microcontroller, only logic gates If 1 is high then  A & C should be high If 2 is high then  B & D should be high If 3 is high then  A & D should be high If 4 is high then  B & C should be high Where 1,2,3&4 are inputs and A,B,C,D are outputs No two inputs will be high a t the same time

Question by qwerty156 7 years ago  |  last reply 7 years ago


Send and receive an electric signal...? Answered

Hi everyone,I just wanted to know how I can send a small electric signal over a distance(not more than 10 meters)wirelessly and receive it at the other end to trigger a relay which in turn of course.. switch higher voltages and do something say...light a LED.I don't know much about frequencies,oscillators and FM/AM or anything.So please let me know how I can get an idea about these and most importantly accomplish what I just mentioned above.

Question by Adarsh_tronix 6 years ago  |  last reply 6 years ago


How to boost a sawtooth signal?

Hi, I need to make a sawtooth generator based on an NE555 (the power supply will be 15 volt - 5000mA), and I need to boost the output signal as follow: http://s21.postimg.org/dwz6aynvb/Sawtooth.png Which needs to go from 9.6 volt to 14.10 volt with a 3000mA current. I've found a schematich, but I don't know if is valid: http://s27.postimg.org/9ptmbsbkz/Signal_Boost.png Would be a viable way, using this schematic, or there would be a better/different solution? If so, someone could suggest me another schematic or tell me how to modify the one which I posted? Thank you.

Question by akopelumenuscu 3 years ago  |  last reply 3 years ago


need an idea for wireless signaling. Answered

I want to make a simple wireless transmitter that can be used for a signal line for a project. I technically want to push a button at one end, and at the other end have it so it is like the button was pressed there. I would like it to have a range of about 30 yards (preferably without going over government limits)... Could i do this with just a transmitter and receiver?? Where could i get them (i have an order at digikey, so if there were a way i could get them and add to my order it would be great)? Any ideas? Thanks! :)

Question by astroboy907 8 years ago  |  last reply 8 years ago


Intercept traffic camera signals

I know a guy who knows a guy (I know, cliche) who was able to combine a cantenna, a lunchbox, and a small monitor, (and some other stuff) and when they stopped at a red light, MacGyver was able to display the image from the camera on the screen. Basically, they were looking at themselves from the point of view of the traffic camera. So, my question is, how easy would this be to do? I'm guessing the right software on a *laptop with a wifi card would suffice. What does everyone else think? *Edited

Topic by NozeDive 9 years ago  |  last reply 9 years ago


How to amplify signal to transistor.

I have created a circuit using the diagram found here: The only differences in my circuit are that I only have used one LED and one 3 volt coin battery. I want to install this circuit in my headphones with the L/R and Ground soldered to the terminals of the speakers. On testing the circuit, I found that the light is only clearly illuminated when the volume is set to max, otherwise, it is very faint. I want it to work at lower volumes. How do I amplify the signal going to this circuit without building a headphone amp? I only want to amplify the signal going to this circuit, not the headphones. Thanks in advance.

Question by Vijster1 6 years ago  |  last reply 5 years ago


Build GSM Signal receiver ?

I want to build device that only find GSM signal...I do not need processing signal's .i Just want to know whether the device is in GSM signal reception and receive this signal??

Question by dj_mina 5 years ago  |  last reply 5 years ago


Bypassing the wireless microphone signal

I want to know that is it possible to block the signal from a bodypack wireless microphone and then to send signal from another device like my phone?

Question by harshmittal17 2 years ago  |  last reply 2 years ago


how to generate signals arduino? Answered

  uhi i want to generate 3 equal variable pulse high with constant pulse low signal that vary with potentiometer and asume it repeat it self every  10us and pulse min is constant 2u and pulse high vary betwwen 5-8u and i want it to carried at specific frequency? i attach the signal i want to generatel 

Question by britich 5 years ago  |  last reply 5 years ago


Will a SSR work with a PWM signal?

Hey guys gotta quick question: I need to be able to cut a PWM signal from a motor for a project. I'm currently using mechanical relays but I'm curious, will a solid state relay work? I know there are easier ways to do this but for right now I'm on a clock and I just want to  know whether a SSR will work for cutting a PWM signal.  Thanks guys!

Topic by HavocRC 2 years ago  |  last reply 2 years ago


The cell phone signal controversy ? Answered

Now, we have long been told that cellphone signals can cause or trigger brain tumor and its pretty much fallen on deaf ears because we cant possibly disconnect ourselves from the cell phones and mobile devices. But is it true that you can prevent them from boosting the cell phone signal like this article states.

Question by sanejan 9 years ago  |  last reply 9 years ago