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?

Posted by Sedgewick17 9 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!!!

Posted by Ewindsor 5 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?

Posted by Incelism 10 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

Posted by sofia14 3 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....

Posted by donjoy 7 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

Posted by fungus amungus 8 years ago


Hi all dear friend i am a wireless cable services provider please help me how can i strong my service note i am not a rich man i am poor man thanks for all brothers

Posted by hearthunter4gf 8 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.

Posted by partyone 9 years ago

Do Laptops have a "Power On" signal?

I was thinking of trying a project in which I do a custom watercooling setup on a gaming laptop of some kind. I would like the loop to power on and off with the laptop itself, but I don't want to use USB power or something like. That made me wonder if laptops have a power on signal, like desktop psu's have. Do they have it or something similar to a power on signal?

Posted by Dashing Rainbow Dash 1 year ago

Need help with signal generator 5kHz and 8.7 kHz

Hi, I'd like some help. I'm trying to make a simple signal generator that will produce a 5kHz and an 8.7kHz square wave signal. I have some basic (very) electronics skills, and know how to follow a schematic and solder things up. The ones I've found online are outdated, using obsolete IC's. Any help would be appreciated. Thanks in advance.

Posted by NorthWind 7 years ago

Adjustable, bluetooth, etc.

I am trying to figure out how to control a device that will be "off" while in the range of a transmitter (short range...under 10ft) and then turn on when it goes beyond the range of the signal. I would also like it to be an adjustable range. I was thinking the device would be "on" constantly as the transmitter tells it not to activate, but once it leaves the signal range it would activate.  Any thoughts? Thank you in advance.

Posted by milkyway312 4 years ago

Dir-300 as Wifi repeater

Hello, I have an AP in my house which broadcasts our wireless Internet signal throughout our house. Unfortunately there is a spot in my house where the signal is not received. I have a spare dlink dir-300 router which I installed custom firmware on (dd wrt). Can someone please help me use it as a wireless repeater. I want it to boost the signal of my other router. Dd wrt has a repeater function, but my router is an atheros chipset so it is not native on my device. P.s: I don't really want some cheap wifi booster made of tinfoil :p . Thanks in advance, Sam

Posted by Bituser 7 years ago

Useless WorldSpace

I have a worldspace satellite reciever lying around at home. I'm from India and WorldSpace service in India has been stopped due to low profit. Now that reciever set and the antenna thing are thrown around useless. I wonder what I can do with it? And is it possible to make a mobile phone signal booster with it??? Or any other idea, anything??? 

Posted by pro2xy 8 years ago

Cell / mobile phone signal relay.

I work in a building with a metal roof that is also in a small valley. We have absolutely no reception inside the building. Outside we have about 4 to 5 bars, inside there are none. Maybe one if you are near a window. The building is mainly one large open space on the side. I was wondering if it might be possible to passively "pipe in" cell phone reception. I was thinking of a large antenna on the roof that would be connected to a smaller antenna affixed to the middle of the ceiling of the main room. I know the antennas would need to be tuned to the correct bandwidths and I would need a little help with that. (Our carrier is Verizon in the USA btw). Would this sort of setup be feasible?

Posted by Jarun 3 years ago

Help With CB Radio Alignment & Tuning

I'm wanting to tune and align my own CB Radio but have found that some expensive equipment is required. However, it looks as though it may now be possible using a computer and Oscilloscope and Signal Generator software downloaded from the net. My problem is I have never used such equipment let alone connect it to a computer then use it. I see that cheap Signal Generators etc are available on the net but am not sure which one would suit 27mhz.. Looking at making my own where possible but admit I'm fairly new to electronics etc. For a better idea of what I am wanting to do please check out this link I'd appreciate any help or advice re this.

Posted by RockQ 3 years ago

Direction/turn signal indicators making them brighter with led bulb I need help pls

Hi. I somtimes ride a 1985 yamaha ms50 pogal 50cc moped. It has an 6v electrial system where as modern day scooters are 12v. I bought a knew indicater relay for it and checked all the bulbs as the turn signal indicators are not so easy to see flashing. I mean, on average sunny day other road users would need to look hard to see them flashing. the bulbs are 6v 15w and both old and knew flasher relays gives output of 6v 40w. I would feel much safer when turning if I had a bulb that gives a brighter flash to give other road users a better idea when im turning. I can see on the web there is a 6v 5w and 10w bulb I can try or even 6v leds but I dont know much about leds. the stanadard factory fitted indicater buld 6v 15w gives an ok flash at night, but in sunny daylight I would need to be close up to see it flash which is no good! I don't want to change the originality of this little ped since it has been carefully taken care of over the years and has made it in intact into current times as is. I need to come up with somthing that will work and if I replace a buld with a 5w or 10w when it should be 15w I may get a brigher flash or just blow the bulb. I wonder was there a problem or just bad design with the indicator lights on the yamaha ms50 pogal when they first came out in the 1980's as I have seen a couple of them fitted with suzuki fz50 indicators and other makes of bike turn signal indicaters on them. I don't think the flashers are faulty I feel they where just made that way. I could be wrong. I suppose there could be a bad earth on the flashers. Sorry to go on so much about this. Im looking for your suggestions for a brighter indicator flashers which is purely for safety reasons. If car drivers can see where im turning, im less at risk of being nocked off by them. Im thinking a higher or lower wattage incandescent 6v buld or even a replacment 6v led buld ive seen on ebay but as I said. I know nothing about led bulbs or even if they will work on my moped. Would a equivalent 6v 15w led give a brigher flash than a 6v 15w tradisional incandesant bulb? can someone help me here pls Here's the led ive seen on ebay;=item4d08c3be3d these are the standard 6v 15w bulbs i want to replace with brighter led bulbs  

Posted by selectauto 5 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

Posted by NozeDive 9 years ago

Remote shutter - Transistor madness (or some other sort)

Hi all, I'm trying to build remote shutter for my camera. Intervalometer to be exact. That doesn't really matter. I have this page describing how to make a simple remote shutter. The schema is simple - trivial. However, instead of 2 physical switches, I'd like to control it using audio signal from my smart phone. I'm a programmer and I can make an app that will output signal of any volume and frequency. I'd like to control these two switches using this signal. Those switches provide 4 positions, however only 3 are needed - nothing, focus, shutter. Can anyone adjust that schema, add (probably) transistors or some other parts if needed to make this happen? Remote shutters for other cameras (Canon, Nikon, Pentax, ...) work in similar way, so similar schemas can be derived to serve whole range of digital SLRs. Motivation: I don't want to buy costly and redundant intervalometer, I can create nice app for Android which can work together with just small DIY piece of analog circuit to create wonderful timelapse videos.

Posted by skrat 6 years ago

Using AC to operate a automotive 12 VDC relay

My question is:  can a typical 12 vdc automotive relay be operated (voltage across terminals 85-86)? I am building a car from a riding lawn mower for our grandson.  I want to operate lights from the 12 VDC circuit but I need a signal voltage to actuate the relay across relay terminals 85-86.  I would like to use the existing AC powered light(s) voltage for this purpose?  Possible?

Posted by mndb1971 1 year ago

EDITED: "Odd things" people buy......recent "acquisition"

Recently I "acquired" a ClearVue device (pictures are mine) which claims to use the AC mains wiring of a house as an antenna to increase reception. What a bunch of malarkey. Oh, I am not saying it doesn't "amplify" the signal using power from the socket is gets plugged into, but that it is ONLY a signal filter. People I have seen that had one of these, bought it with the dreams of using the AC lines in their houses as an additional antenna, AND because it had, what appears to the untrained eye, a dish antenna on the front of it (it is just a piece of plastic adding no true value to the functionality of the device). Some people in marketing make me furious with how they attempt to dupe the public. *sigh* A forum was set up for people that had bought this device new, and some of the responses are scathing....I order the clearvue super booster indor tv antenna, in April 2002. They cashed my check of course but Never sent the product. I called the companyand the office is closed.go HERE for more responses.....The unit, I just noticed, has 2 black wires in it. The oddest thing I have every seen, really. One is hooked to a 5.7 meg resistor, the other end is soldered to the "cable" output. The second black wire is soldered to the AC / CAB switch (CAB side), which then runs to the 2 white wires coming in from the Mains plug - BUT it is not attached to them, but rather coils around them for about 2-3 inches. This wire terminates into the AIR. No connection whatsoever on that ends. And, coming soon to a thread near you, will be the second "antenna booster box" I got in this box lot - dissected.

Posted by Goodhart 9 years ago

signals for Model railways

I made the signal. I will show it soon.

Posted by paul Fast post 2 years ago

How well will an RC radio signal transmit through an underground tunnel?

I want to take one of those overbuilt monster truck RC cars from WalMart and stick a camera and a bunch of lights on it, then drive it down drainage tunnels to see where they go. Why? I'm nuts, that's why. My question is this: how will being in an underground tunnel effect the RC transmission? In a cement tunnel it seems to me that it would have increased range because the signal would bounce down the tube without getting lost in the air or degraded by other signals, resulting in improved signal range. Is this hypothesis true? I would be thrilled if I could get 100 feet of signal range in a tunnel. Any ideas?

Posted by ilpug 6 years ago

Use guitar amplitude signal as a switch to light a bulb

Hello,  I'd like to light a bulb by using a guitar as a switch. My problem is I don't know where to plug the guitar into. Is it some kind of switch I have to tweak, or is it some kind of resistor. I've attached an image to explain the electric circuit. 

Posted by davcoccio 4 years 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.

Posted by killswitch123 6 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?

Posted by dogsrcool2me 11 years ago

Bass (guitar) signal spilt + combine

Hello I have been thinking about a project that I would like to try. The idea is that I would like to be able to take the signal from my bass guitar and split it in two (configurable how much signal in each, but the sum should be 100%), apply an effect to one of the lines and then combining the two signals again having only applied the effect to some of the signal while carrying the clean signal through. This way I could apply e.g. distortion to only 20% of the signal. I thought that I could control the volume simply by putting an resistor in the signal line, but this gave quite some noise. This is my first attempt at building electronics for instruments, but have some experience with electronics in general. Hope you can help me with a couple of questions: 1) Shouldn't you be able to lower the signal simply by resistors? Should you use any specific resistors for audio? 2) Is it possible to recombine two audio signals and can you just put the wires together? Kind Regards Brian

Posted by FatMooseHenry 5 years ago

PWM to Digital Signal

I am trying to make an R/C sumo bot for a competition. What would be the easiest way to run regular DC gearhead motors from a servo controller? I'm thinking of somehow converting the pwm signal into a digital signal that would run the motors forward or backward.

Posted by Stingray 7 years ago

TV receiver

Is there a way to receive TV audio signals similar to radio receiver signals?

Posted by kprasann 8 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.

Posted by SamaritanWonders 8 years ago

Traffic signal controller - do you recognize this device?

Do you recognize this device? Is it a traffic signal controller? I saw this guy standing at a busy intersection, and it appeared he was controlled the traffic signals. Unfortunately, I didn't get a chance to talk with him, but I did get a picture to investigate later. Do you recognize the device?

Posted by ewilhelm 5 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

Posted by bytor70s 3 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!

Posted by HavocRC 1 year ago

Zener Set Voltage Signal Circuit (help)

Hey Everyone- I have been researching on ways to send out an electric signal to trip a relay to shut off my battery charger. I did find some simple circuits and I did the math for what I would need and could not find big enough zener diodes and resistors. Battery+(Resistor)(Zener Diode)(Relay Input)(Battery-) I need this circuit to send a 8.2 or 10Volt 15mA signal to my Relay when the batteries reach 235 volts. Following are the SPECS for the Input signal on my Relay::: Control Voltage Range 3-32 Vdc 90-280 Vrms (60Hz) 18-36 Vrms/Vdc Max. Reverse Voltage -32 Vdc - - - - - - Max. Turn-On Voltage 3.0 Vdc 90 Vrms 18 Vrms/Vdc Min. Turn-Off Voltage 1.0 Vdc 10 Vrms 4.0 Vrms/Vdc Nominal Input Impedance 1500 Ohms 60K Ohms 9.0K Ohms Typical Input Current 3.4mA @ 5 Vdc, 20mA @ 28Vdc 2mA @ 120 Vrms, 4mA @ 240 Vrms 3mA @ 24 V Any help on this would be great Thanks!

Posted by rc_rs_ss 7 years ago



Posted by 646433 9 years ago

Simulating a T-vo service signal

Is it possible to simulate a t-vo service signal. I want to use a T-vo that I bought at a thrift sotre, to record my outside surveylance cameras, but it wont let me record without the service. Can I bypass this, or simulate a signal somehow? can I make a service simulator for this? I dont want to use it to record tv, I have a dvd recorder for that, just for the cameras.

Posted by Timjoe 9 years ago

LCD arduino speedometer sending signal to solenoid

Hi i'm a student, i'm currently doing a project which require me to be able to send the signal from the LCD arduino speedometer to the solenoid, help please!!!!!!  P.S if i'm missing something out please post a comment.  Thanks 

Posted by brian.tan.10004 3 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

Posted by K20Evo 2 years ago

Pre-historic Video Amplifier Antennas useless?!

I've been learning quite a bit about video amplifiers recently. And it's brought me to a question. When antennas were the source of video-signal, you would often hear horror stories of people having to get up off of their couch to adjust the "bunny ears", to get a clearer signal. I'm just confused. Why would they have to be adjusted? The signals, if my understanding is correct, is electrical signals sent through the air, and the signal would cover thousands of feet. It surely didn't matter if the antenna was all but a few inches from one spot or another. The signal should be able to hit it just the same no matter what, correct? If you are in a car, it's one thing - you're moving. But in a house, you're stationary. Any explanation?

Posted by freethetech 6 years ago

High tech smoke signals

Daniel Schulze is an industrial design student in Berlin who is working on a sweet smoke machine. The plan is to have a 7x7 grid of holes that shoot little clouds of smoke into the air. The smoke comes from a fog machine and is shot up in the air with drivers. Check out the video below to see a test of one row. The full setup will be shown next week at DMY Berlin. A Modern Take on Smoke Signals: "For Those Who Can See" via engadget

Posted by fungus amungus 8 years ago

r/c lawnmower signal clean up

How do I get my program setup to correctly read the signal from my reciever to the arduino.  I am trying to drive a motor controller and it sometimes works but with very little consistancey.  I don't know what to try, any information would be greatly appricated.

Posted by mfm5024 8 years ago

How to convert human voice into a digital signal?

Can anyone give me an idea how can I convert human voice to a digital on?  I want to detect some ambient human voice, the content didn't matter. Just hitting that frequency range or it is human voice and give me an on signal.  regards, Steve

Posted by swong4 6 years ago

frequency filter

I've never designed a filter before and I'm not sure if you can do this. Basically I need a way of filtering out all signal except for signal in the range of 40-150 Hz

Posted by guyfrom7up 10 years ago

How to Interface IR and motion sensors to a PC ???

 Hello everybody I am working on a project  where i am supposed to get signals of sensors into my computer and use these signals to generate some kind of event.Since i am new to this field, can someone guide me on how to connect sensors to a pc and how to receive signals for processing. Thanks in advance

Posted by farazalam 8 years ago


Please forgive me if I am missing the INSTRUCTABLE on this, but I'm looking to MOD a Traffic Signal (or Stop Light) and I haven't found any within MAKE or INSTRUCTABLES website(s). I was gonna hook it up to a Light Switch (BORING!) but was hoping I could get some ideas ... C'MON INSTRUCTABLER's!!! Help! thanks.

Posted by daveanton 10 years ago

Video signal from pc

I need to know which is the video line on the monitor cable coming from a computer.If there is an audio line coming from pc to monitor that aswell but mostly interested in video line

Posted by Leon Jacobs 9 years ago

Traffic signal input voltage help

I have recently bought this traffic arrow from a surplus store and i cannot find the input voltage anywhere on the net. it has a built in switch mode power supply from what i can tell and i think it is 120V AC but am not sure. the arrow is a GE Gelcore LED Traffic Signal. ANY help would be appreciated.  thanks

Posted by devicemodder 5 years ago

Idea for irobot challenge

Hi friends, I am a Masters student of Computer science from Louisiana state university and i am working on signals transmitted by brain to control irobot. As we know that there a millions of neurons working simultaneously to do specific tasks. The signal produced by brain is in the range of milivots and also very scattered, the main hurdle is to tap that signal effectively to reproduce in a digital form and channelize it to control the irobot.

Posted by bharatn 11 years ago

Controlling two servos with one pin and a NOT-gate

Here's an interesting idea. It may be possible to control two servos independently with only one output pin and an inverter/NOT-gate. Normally, a servo is at its 'center' position when a pulse is 1.5 ms & its angle (or speed for continuous servos) is based on the difference between the length of time of the pulse it received & the base-time of 1.5ms. The servo itself does not react to the time BETWEEN pulses however. If the signal was inverted, the result would be a pulse with a time being that of the time between pulses of the initial signal. If the width of a pulse and the time between pulses can be independently controlled, then it would be possible to control one servo with the signal directly, and another servo using the inverted signal. I found something similar here [] but it seems to be intended for 'reversing' the signal used to control one of the servos.

Posted by Michael_Everett_Feder 3 years ago

Digital Photoframe to LCD monitor / general tech question

I have this digital photoframe lying around. It has no input other then a SD card slot. When I look at the datasheet (somehow I can't upload the file, but you can find the datasheet here) I see the different functions of the screen connector pins (page 5), including: Blue Analog Video Signal Green Analog Video Signal Red Analog Video Signal I was wondering, is that somehow related to the RGB from a VGA signal, since VGA is also an analog signal? Would it be possible to connect the RGB from a VGA cable to these pins to use the photoframe as a (lowres and slow) external monitor? I guess it's not as straight forward as just attaching 3 wires is it?

Posted by javl 8 years ago

Turn Signal Jacket, Soul Cycle Chopper, Ride in Style

  Turn Signal Jacket Soul Cycle Chopper Ride in Style Scraper Bike Wheels Reflector Bag Badge Bike Gear Belt Wobble Bike Bike Guide Granny Chopper Bicycle Car Horn DIY Bamboo Frame Change a Bike Tube Twisted Flower Spoke Bright Bike Mountain Bike Scooter  

Posted by randofo 8 years ago