RF Generators

Just wanted to know if Function Generators were the same as RF Generators? I'm looking for a cheap RF for a project and when I put in "RF Generator" in eBay, it comes up with Function, Signal, and Linear Generators as well. Thanks.

Posted by FrenchCrawler 11 years ago  |  last reply 9 years ago


Remove RF welding

I am trying to build a small tent and bag.  i have some nylon fabric that have been RF welded before. Is there any way to remove this welding so that i can reuse the material ?

Posted by tingtong74 6 years ago  |  last reply 6 years ago


RF to IR conversion?

I have a RF remote on my motorised theatre screen, i want to control it from my universal remote but it doesn't learn RF. Is there an easy conversion from the RF remote and receiver to IR ?

Asked by sutek 9 years ago


Mini RF Remote

I would like to build a RF remote controlled candle but I am having a hard time finding a remote to do the job. My question is does anyone know where I can get a Cheap! Remote and receiver to work a single led? I found This: Wireless DoorbellI was thinking of pulling the speaker out and attaching a Led, My thought is if it turns on/off a doorbell noise if should do the same for a led? right?Thanks for your time and help.oh, I should say it needs to be small enough to fit in a candle like this: FlickerCell REMOTE™ Battery Operated LED Candle

Posted by corerat 10 years ago


Passive RF battery?

Hey i was just wondering what are typical conversion rates for signal to electricity in passive RFID tags? Information on the subject is usually not geared towards the electrical charge being generated.

Posted by Qcks 4 years ago  |  last reply 4 years ago


RF shielding.. Help

I would like to know what materials I would need to shield, at least 20k watt microwave device, in a 10 foot by 10 foot space. I need to be able to work on the other side of the wall without danger.

Posted by WhiteThatch 11 years ago  |  last reply 10 years ago


Hf or rf welder

I have some flexible clear vinyl that I've been trying to figure out how to infuse together for a project I want to make.  I've been successful with vinyl glue (after much tests with different glues and epoxies). However chemical bonding can become expensive.  Ive tried many experiments with melting the vinyl together with soldering irons. Either the bond is not strong enough or it melts through, or it weakens the material too much.  I'd be really interested to see someone make an rf or hf welder that is capable of welding heavy gauge vinyl.  Cheers!

Posted by senica 4 years ago  |  last reply 4 years ago


RF JAMMER

HI I HAVE REED ALMOST EVRYTHING ON YOUR WEBSITE BUT IM STILL CONFIUSDE!!!IM INTERESTED IN BUYING THAT JAMMER BUTI GOT QUESTIONS 1-IS THIS RF J. THE SAME AS THIS propeller???-can i order that asembley board or i need 2 do it my self???-can i use that  (sd) 2 build a jammer??doz it jamm low freqency like less then 2mhz??? can u sell me that board complete????my e-mail is koza1982@gsi.pl   thx

Asked by hyper2020 8 years ago  |  last reply 8 years ago


How to make RF remote?

I was given a Clapper for my birthday... anyways, it came with a remote that uses Radio Frequency to turn on stuff. I want to know how to make my own circuit, any suggestions? I only want to control one thing, so the transmitter doesn't have to send too complex a signal and the receiver won't have to decipher much. All I need to know is HOW to send it. THANKS!

Posted by Login258 9 years ago  |  last reply 6 years ago


Power LED from RF? Answered

I have a maybe somewhat unusual question.There is a super simple circuit that enables an LED to be powered by ringing mobile phone. Can be found at http://www.creative-science.org.uk/mobile_LED_simple.html What I would like to do is to power LED but from a distance, preferably Radio Stations of (if possible) power lines. LED does not have to be constantly on or bright, it can "blink". I was looking at Joule Thief and combining it with capacitor ... The point is that there should be no battery. Is such a thing possible?

Asked by nccwarp9 7 years ago  |  last reply 1 year ago


Basic RF control transmission

My goal is to press a button on my transmitter side and have the receiver flip a relay - that's all.  It's probably the simplest possible use of RF technology...  and it's almost impossible to work out on google.  I am trying to transmit and receive just a simple control signal about a range of 300m, so dismantling 27Mhz toy cars is not an option.   Has anyone successfully made a simple RF circuit before? I can buy a 433Mhz transmitter with this range, but they take FSK or ASK modulated signals.  From what i can tell, there is nothing simpler than the 'OOK' version of ASK modulation for transmitting signals.  If I'm wrong, please correct me.  Otherwise, if I'm stuck with FSK or ASK.  I found one site (bottom of PDF: http://www.edn.com/contents/images/101101di.pdf) providing a simple circuit to produce FSK.  I was hoping for something simpler, but if you think this is the easiest way, i'll give it a shot. Can someone guide me towards the correct ICs and circuits to create this project? Thanks in advance for your help

Posted by trytrytryagain 7 years ago  |  last reply 7 years ago


Customising an RF remote control

Hello all. I hope this finds you well. I would like to know whether there is a simple way to convert my existing RF remote control (bought from Maplin, UK, for controlling included mains plug adapters) to use physically different buttons for switching things on and off.  The idea is that I'd like to - neatly, if possible - mount the new buttons onto a flat surface: a table top, for example. Could anyone advise whether this is doable without dedicating more than a day or two to it, and how; or if I should should look for an alternative way around the problem? Many thanks indeed, James

Posted by dialmformostyn 3 years ago  |  last reply 3 years ago


IR or RF light switch.?

I need to replace an old (1940s) rotary switch.  It turns on 21, 20 watt/110v light bulbs on a display sign.  Each one in sequence.  Once on, each light stays on until switch is rotated backwards or all are turned off.  Currently, the switch is on a 10' cable with all wires forming the cable.  It is bulky and contacts are bad.  So, I'm hoping one of you wizards can give me instructions on how to replace it with a wireless remote and relays or whatever.  I bow to the experts. If you prefer, you can contact me at   Moto-Ed@att.net Thanks, Ray

Asked by moto-ed 9 years ago  |  last reply 9 years ago


RF remote Microcontroller etc?

So I found this remote control deal http://www.lightobject.com/1Ch-Remote-TX-Unit-IC-1527-C1-case-P385.aspx For the past few months I've bounced around the idea of using a hacked remote to turn the lights in my room on and off. This, however, makes hacking stuff a non issue. However, I still don't know how to make the remote communicate with a microcontroller. The one I linked appears to have an antenna, which is undesirable, but could become an option if nothing else. I also would like to see if I can find a similar control that uses infrared. Right, so, Basically I want a remote that sends a single signal to some kind of Microcontroller. When this signal is received, I want the microcontroller to emit a single pulse to toggle a latching relay to turn my lights on and off. Where should I look to find ideas or buy parts? I already have an Arduino, but I think I'd rather build a knockoff for a permanent circuit. So thanks in advance.

Asked by mrmerino 6 years ago  |  last reply 6 years ago


Better RF Mouse Range

Hello. I got a Wireless Mouse that still working fine.The signal between the Mouse and its receiver is not so great, about half meter, and it stop responding. So I took apart the Mouse and its Receiver. The antenna of the Mouse is kind of steal (I think but its color) and the one of the receiver is coil of very thing copper about 3/4 turns around a piece of plastic. So as said I would like to increase the signal between both, for better rang. What I have found around the best material is copper, so here is my issue. Is it better to modify the antenna of the Mouse or its receiver?? Should I rather use thicker Copper Wire and do few spinning around a piece of plastic, or use a thinner Copper Wire and do a lot of spin around a piece of plastic. So what better for a strong signal: - thicker wire and less spinning or - thinner Wire and more spinningThanx for those that would give a some advise/recommendations. I am will upload pictures later when possible. PS: I manage to add to it a Switch to turn off the mouse to extend battery Life.

Asked by saadland 8 weeks ago  |  last reply 8 weeks ago


What is the range of 433 Mhz rf Module ?

Asked by nirmalnirmal 4 years ago  |  last reply 4 years ago


how to make an inexpensive rf remote control ?

I would like to make an rf remote to turn an led on and off. Does anyone know?

Asked by diyuser 8 years ago  |  last reply 8 years ago


Which electronics emit RF frequencies? Specifically, do tape recorders?

Do audio recorders emit RF frequencies?  I know that many will find this question beneath them, but I thought I'd give it a shot. I am trying to purchase AUDIO detecting equipment specifically for tape recorders. Please, help an Elec-Idiot out. Thanks. 

Asked by gflow 8 years ago  |  last reply 8 years ago



What cords do i need to make rf modulator work?

I have a new dvd recorder and i want to by pass copyrights on my vhs tapes so i can put them onto dvd. someone suggested for me to get a rf modulator. but when i go to order it it gives me options to buy two diff types of cables so i need to know what cables i need

Asked by rioangel09 8 years ago  |  last reply 8 years ago


Low Gain in RF filter after the signal goes through the switch 2-18GHZ

Having trouble with an RF switch, getting low gain as it passes through the switch, I have x-ray the component, and all links are intact, no ESD damage that i can see, Does any one know what could be causing it to have low gain? possibly the RF track in the Switch? HEEELP?!?!!

Posted by SamuelG122 1 year ago


how to make a reed switch for sensing a magnet from 4 to 5inch distance? or a substitute with RF Answered

Experts, pls guide, that i want to know the way to make a reed (in DC) have to sense a magnet from a distance of 4 to 5inches. did small reed will act so ?? if a yes, then which specification have to look?? or did there any circuit or something for making it much more powerful??

Asked by shinojmahe 4 years ago  |  last reply 4 years ago


Wifi enabled remote

Hi, I have a remote for my fireplace.  It uses a RF of 303.87 mhz.  I was trying to think of a way to build something that could recieve a message over wifi that would then trigger the 'buttons' on the remote.  I found some RF receiver/transmitters but everything is for 315 or 430 mhz.  Will those work for 303.87? Or was this remote designed to not be easily cloned?

Posted by FrankA2 4 years ago  |  last reply 4 years ago


Full duplex radio module? Answered

Hello I'm having some problems finding the correct modules. I'am trying to incorporate some radio's into some peltor headset's that i have. I want to be able to talk ( like a phone call ) without the push to talk button.. Is this possible? can i use RF? Or do I need to use bluetooth?

Asked by Xyphion. 3 years ago  |  last reply 3 years ago


AM transmitter design ??

Is it better to use a diode for DSB SC modulation for good range ? or it's better to use npn transistor ?

Posted by walidj 7 years ago  |  last reply 7 years ago


How can I reduce the signal range?

Any one know how to modify this so that you can adjust the range? Would simply adding a variable resistor to control the input voltage work? Or will I need an attenuator? If so, any ideas how?I would like to manipulate the existing range, not really extend it. https://www.instructables.com/id/Modifying-a-Cheap-Portable-Cellphone-Jammer/?

Asked by zosim 7 years ago  |  last reply 7 years ago


An Opps Purchase on Ebay Is it Salvageable?

So i have an 1998 dodge ram 1500 i purchase with no power options at all so i got power window regulators and replaced the door panels and bam I've got power windows. and since the door panels had lock buttons i bought some cheap 12v actuators off eBay and wired them up and bam. power locks.. THEN in all my creativity i was like i'll just buy an RF 4 channel kit and make it key-less. so i ordered this kit not realizing what type it was http://www.ebay.com/itm/320783435624?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649#ht_2920wt_1185 to summarize this kit requires you press one button to activate the a channel and press a second button to disable the active channel.. not at all what i was looking for.  Is there any way i can convert the kit i've already paid for into a momentary style. so as long as i'm holding the channel button down its active. ????  here are all the chip/ component numbers. 4x SRA-12VDC-CL 1x  SC2272-L4 - BD25D5D1 1x 9530FH~~~~~~ unreadable some residue on the chip a few caps a few resistors and an LED..  anyone think this is doable or should i just shelf it and get a diff kit?

Posted by jgosselin 7 years ago  |  last reply 7 years ago


How To Power iphone RF Board? Answered

I would like to try to hook up a battery to this RF board but I don't know where to hook up the power supply. And i can figure it out but where is the antenna hooked up?

Asked by connoboarder 6 years ago  |  last reply 6 years ago


RF antenna wiring (Possible error)?

For our truck scale, we have small remotes to automatically record the weights. The remotes just do not have the range that they should be getting (Sometimes we have to actually touch the antennas with the remotes). Before I ask my questions, let me explain how they are wired up. There are 16 remotes going to 16 channels in the controller box, The first set of 8 are on one receiver/antenna and the second set is just a copy of the first set. The antennas are just a small whip type antenna connected to the center conductor of the coax, there are then 4 more of those wires pointing down, these ones are connected to the shielding on the coax. There is a 75ft RG6 coax cable running to each of those antennas, This cable runs into the scale shack and connects to the f-type jacks on the controller box. Inside the box, there is a short piece of shielded wire going from the coax jack into the rf receiver. Here is where it gets weird, The center conductor AND the shield both are attached to a single screw terminal on the rf receiver. If my thinking is correct then this basically turning the coax cable itself into the antenna, Am I correct? Why would it be installed like this, Was it a bad installer? How should this be done for optimum performance? Thanks, Kade

Asked by FarmerKJS 2 years ago  |  last reply 2 years ago


How do I make an RF remote control?

How do I use these? (http://www.vegakitindia.com/productdetails.asp?ProdID=RF01A315) I need a complete step by step guide on how to make an rf remote control... I'm used to AVRs. But remote control is new to me.? Sorry if this has already been asked, i couldn't find anything to-the-point

Asked by pro2xy 8 years ago  |  last reply 7 years ago


What should i do with an old USB Rf transceiver?

I Have Here An Old USB RF transceiver from a wireless Labtec mouse. It's not bluetooth and has some sort of reset button on the side of it. What should i make out of it?

Asked by chriswillb 9 years ago  |  last reply 9 years ago


RF transmitted power Legality / Codes. Answered

I'd like to power some LED devices "remotely" using transmitted power. I've seen there are Instructables related to this www.instructables.com/id/Wireless-Power/ www.instructables.com/id/Wireless-Power-Transmission-Over-Short-Distances-U/ I'd like to create a power source that could energize a small LED circuit at a maximum distance of ~3 meters.  Even better, build an adaptive control, ensuring additional circuits are adequately powered, but design-limited to a safety max. My concern is to ensure the power source conforms to applicable United States regulations / codes.  I have a background in physics, but no experience in electrical engineering or contracting.  So I really don't know where to begin translating theory into device.  Can anyone suggest advice / guidance / starting references : What is the legality in the United states? Are there any codes that apply / regulate transmitted power? Pro tips? Muchas gracias for guidance and suggestions! CarLoz

Asked by CrLz 9 years ago  |  last reply 9 years ago


i want to know the arduino program for controlling 2 motors using rf module?

I want to know the arduino program for controlling 2 motors using rf module.i am using a arduino duemilanove & motor driver shield 

Asked by harish.rahman.75 4 years ago  |  last reply 4 years ago


Why to use RF directional couplers in some measurements and control processes ?

I am an electronic engineer in the field of RF directional couplers, but I am puzzled about this question, why to use RF directional couplers in some measurements and control processes ? Today I come to this forum to turn to you to discuss my understandings are appropriate. Here are my personal understandings: RF radio frequency is referred to as RF current, it is a high frequency AC change electromagnetic wave short. Less than 1000 times per second changes in alternating current called low frequency current, more than 10000 times called high frequency current, and radio frequency is such a high frequency current. RF technology in the field of wireless communications with a wide range of irreplaceable role. In the electronics theory, the current flows through the conductor, the conductor will form a magnetic field around; alternating current through the conductor, the conductor will form an alternating electromagnetic field, known as electromagnetic waves. When the electromagnetic wave frequency is lower than 100khz, the electromagnetic wave will be absorbed by the surface, can not form an effective transmission, but the electromagnetic wave frequency is higher than 100khz, the electromagnetic wave can be spread in the air, and the outer edge of the ionospheric reflection, the formation of long-distance transmission capacity (Analog or digital) with high-frequency current modulation (amplitude modulation or FM), the formation of radio frequency signals, through the antenna to launch into the air, the radio frequency of the high-frequency electromagnetic waves.  Long-range radio frequency signal received after the anti-modulation, reduced to the electrical information source, this process is called wireless transmission. Wireless transmission developed for nearly two hundred years, forming a large number of users and product groups, but because of climate change and the impact of surface obstacles, can not transmit the perfect information. Modern human invention of the cheap high-frequency transmission cable (radio frequency line), in order to pursue the perfect quality of information transmission, taking into account the original wireless devices, wireless cable transmission began to pop. Resulting in the concept of radio frequency transmission. If your information source through the secondary modulation, with the cable to the opposite end, the opposite side with anti-modulation of the information source after the re-application, no matter how low frequency, but also radio frequency transmission, if there is no modulation anti-modulation process, The information source is transmitted directly to the opposite end of the cable, no matter how high the frequency, are the general cable transmission. SI --- Signal Integrity Signal Integrity PI --- Power Integrity Power Integrity emc --- electromagnetic compatibility Electromagnetic Compatibility rf - radio frequency RF emc = emi + ems EMI = Conduction + Radiation Emission SI: The Fourier transform shows that the higher the signal rises, the higher the amplitude of the higher harmonics. The MAXWELL equations see that these alternating harmonics produce alternating current at the adjacent line. And even through the space parasitic capacitance directly to another conductor, so these high harmonics is caused by radiation interference (emission) of the main factors; (that the simple point is that the signal rise faster, the more complete the signal, the better the signal quality, But for emi bad) . PI: PCB exists on the number \ \ analog area, high frequency \ 'low frequency region and other different areas and planes, if the partition is not easy to interfere with each other, that is, conduction conduction (conduction). Ps: Excuse me if I was wrong in words or expressions as I am a green hand in the field of RF directional couplers. I need continual learnings. What is your idea ? Do you agree with my ideas ? Any of your ideas would be highly appreciated. May someone would like to help ? thanks in advance.

Posted by maryzhu 1 year ago  |  last reply 1 year ago


Virtualwire RF 433mhz Voltage problem mk2

Hi, I have this code and have modded it a bit, i was wondering if there was a way of making the pincode more than 1 digit long? Also i have got the code sending command and pin code when buton to pressed and stopping when released and the receiver end reading it and seeing it stop, sending a pin high when it reads it but i cant get i to go low when it stops receiving it. wen ever it looks like it will work It seems to make the pin go to 0.16 when low to 0.24 when high. can you help? tom Transmitter code #include int button = 2;   void setup() {     Serial.begin(9600);     vw_set_ptt_inverted(true);     vw_setup(2000);     vw_set_tx_pin(4);     pinMode(button,INPUT);     pinMode(button,LOW);   }   void loop() {     while     (digitalRead(button) == LOW);      sendMessage("1", "5");      //delay(10000);   }   void sendMessage(char* pinCode, char *data) {      if (strlen(data) > 0) {       double startTime = millis();       Serial.println("Sending...");       int msgSize = (strlen(data) + strlen(pinCode) + 1);       char packetData[msgSize];       strcat(packetData, pinCode);       strcat(packetData, ".");       strcat(packetData, data);       Serial.println("Debugging ");       Serial.print("Sending Command: ");       Serial.print(data);       Serial.print(" with Pin Code: ");       Serial.print(pinCode);       Serial.print("\n");       vw_send((uint8_t *)packetData, msgSize);       vw_wait_tx();       double endTime = millis();       double timeTaken = (endTime - startTime);       Serial.print("Time Taken: ");       Serial.print(timeTaken);       Serial.print(" ms\n");     }    } Receiver Code #include   #include   int relay = 8;   byte message[VW_MAX_MESSAGE_LEN];   byte messageLength = VW_MAX_MESSAGE_LEN;   void setup() {     Serial.begin(9600);     vw_set_ptt_inverted(true);     vw_setup(2000);     vw_set_rx_pin(2);     vw_rx_start();     pinMode(relay,INPUT);     pinMode(relay,LOW);   }   void loop() {     while     //(vw_have_message())    (vw_get_message(message, &messageLength;))     {        int command = processResponse((char*)message, 1); //Byte Array Response and Pin Code.        if       // (vw_have_message());        (command) {          Serial.print("Received Command: ");          Serial.print(command);               Serial.print("\n");          digitalWrite (relay,HIGH);        }                   else //REMOVE          delay(100); //REMOVE          digitalWrite (relay,LOW); //REMOVE                 }    } int processResponse(char* message, int pinCode) {       char *p = message;       char *buf;       int o = 0;       int pin;       int command;       while ((buf = strtok_r(p, ".", &p;)) != NULL)  {          if (o == 0) {            pin = atoi(buf);                    } else {            command = atoi(buf);            ;          }          o++;       }       if (pinCode == pin && command > 0) {           return command;                 } else {          return 0;                         }   } This code only sends pin 8 from 0.14 when low to 0.17 when high. unless you remove the three lines marked REMOVE then it goes from 0.14 when low to 4.47 when high but stays there and will not go low when buttton it released. Please help

Posted by Senken 3 years ago


What is the vernacular to describe an rf transmitter w/rotary knob that turns a servo/motor 1:1?

I'm barely schooled in robotics and RC.  Seems I'm searching for a needle in a haystack without the precise terminology.  I'd like to turn a knob on a remote chassis.  The knob presently turns manually from stop to stop approximately six times.  It meters L/min of air.  Low torque equivalent to about average for volume/bass/treble controls on a stereo. I'd like to be enabled to turn this knob at an indexible 1:1 ratio with a handheld remote transmitter that utilizes a likewise rotary knob.  Once the servo/stepper or other is mounted axially to the chassis mounted knob and powered by a wall transformer, the hand held remote need not be indexed to match it precisely.   1/4 ID hose attaches to the unit and a L/min flow meter is attached to the remote.  Rf would be highly desirable.  If necessary, or practical, I'd go with a wired rotary encoder/controller to accomplish the same.  I'm unable to find either option after a day of searching online.  Fully willing to cannibalize existing products as well.  It's sometimes much easier and cheaper way to go. Thanks

Asked by brad.williamson.3110 4 years ago  |  last reply 3 years ago


"Standard" Crystals? Answered

So, I was browsing the electronic goldmine today, and I came across these. What do they do and how are they used? Do you apply voltage to the leads and it emits rf in all directions or what?

Asked by LiquidLightning 8 years ago  |  last reply 8 years ago


Hi, how can I save the received data into a simple text file?

Asked by The_Saint 10 years ago  |  last reply 10 years ago


Homemade wireless xbox computer receiver?

  I want to do this so i can use it on my laptop on the go but I still want to use it on my xbox (yes i am cheap) So i was wondering instead of soldering the wires straight onto the rf module  use something like a female printer port solder it on to the board. Would it still work on my xbox after?

Asked by Aaamazzara 7 years ago


how to make this device?

Hi, i want to make a device, please tell me how... there is something that looks like a tv remote . it has 9 buttons on it. And there are 9 light bulbs. when i press each button, each of the 9 light bulbs should light up. for example, when i press button 1, light bulb 1 should light up. when i press button 2 , bulb 2 should light up, button 3 turns on bulb 3, and so on. this needs to be wireless. i have done some research and i have found that i need something called an RF transmitter and RF receiver. I just need some hints on how to make this device. i hope it is clear what i want , english is not my first language, if its not clear let me know and i will clarify.

Posted by create90212 10 years ago  |  last reply 10 years ago


GM Universal remote extra button?

I have a GMC pickup with a 3 button remote.  I discovered that GM uses the same PCB for all its remotes, so I have a 3 button case surrounding a 4 button PCB.  I want to use the extra button to control an add-on to the truck.  Does anyone know of a way to acquire the RF receiver, what the part number is, etc, and how it would need to be wired in to allow control of external lights on the truck?  I know it would have to be wired into a relay to allow the kind of amperage I am thinking of...but what else am I missing?

Asked by spacecase544 7 years ago


tunnel diode,s

Can you tell me a place that sells tunnel diode,s? I found one tunnel diode in a jvc radio but I lost it.:-( can you tell me the best free schematic drawing programs for Win XP,also.Thanks

Posted by maker12 11 years ago  |  last reply 3 years ago


DIY garage opener circuit

Hi, i was thinking of how to make my own garage door opener circuit. To make it simple, im just using a DC motor for my gates and powering using relay.. Any idea on the circuitries??

Posted by dck 7 years ago  |  last reply 7 years ago


Bluetooth vs Radio Frequency Answered

This is a 3 part question: 1. I am a bit confused. Radio frequency covers 3KHz to 300GHz, so it basically includes bluetooth(2.4 GHz). Why is it that some people talk about bluetooth as something not relating to RF. Do they have different transmission methods? WIFI is also @ 2.4GHZ. What is the distinction between WIFI and bluetooth that makes them so different, covering different ranges, and being able to send different amounts of data at different speeds. I always thought it was the frequency of the wave but WIFI and bluetooth are the same yet they are so different.  2. I am building a project. I need to send data wirelessly. The data is very simple just to turn on or off a series of leds. A friend of mine told me to use radio waves. What does he mean by that exactly since radio range is huge. Is he talking about 40MHz like the RC cars? 3.Bluetooth or RF(again im assuming this to be the same one as RC cars since i will break apart an RC car to remove the transmitter/receiver)Which method consumes less power to send the same amount of data. Distance will not be over 10 meters so i'm not worried about that.  Thanks for the help everyone, much appreciated! Chris

Asked by Chris414 6 years ago  |  last reply 3 years ago


handheld direction finder

Hi - I'm looking for a project to build a handheld direction finder.  I would think you could do this using radio frequency.  Basically, I'd like two parts: the finder and the findee.  The finder would indicated the direction to the findee and that's it.  Not sure exactly what you'd call that... Thanks!

Posted by stevieruns 7 years ago  |  last reply 7 years ago


Hello, how to read video from usb port.??

We are developing an embedded system project based on ardunio equipped with transmitter which transmits video from remote location to the receiver connected to laptop. my que is how to read that video. Is there any freeware tool or any program to read the video..??

Asked by RohitB53 2 years ago  |  last reply 2 years ago


Multiple RFM69HCW with the same Node ID?

I wan wondering if it was possible to have multiple RFM69HCW (https://www.adafruit.com/product/3070) nodes with the same node ID on the same channel. My project I am doing involves a large amount of receivers and 1 transmitter in which I need all the nodes to receive the same message at the same time. Is this possible? I know the ACK wouldn't work as intended as from what I understand, but I am okay with that if this is so.

Asked by bigjohn412 2 years ago  |  last reply 2 years ago


I need a fairly easy 500 Mhz to 3 Ghz signal generator schematic

It needs to be fairly simple to make, my resources are a bit low again, and it doesn't have to generator a lot of different frequencies, just one or so within the range of 500 mhz - 3 ghz. Everything I found on line was either more complex then building a 40 meter transceiver, or was ready built and only cost $200 + Even if there was a source I could purchase, for under say $30, I would take that too. I need it to test my newest rig. I don't want to have to resort to something like this project here...

Posted by Goodhart 9 years ago  |  last reply 9 years ago


Looking for a type of switch

Hi People of Instructables! I hope I am posting in the right place. I am looking for a switch that when you walk pass a point it shuts off and when you walk the other way past that point goes back on.   For example... I have a flash-light in my hand, when I walk through a doorway into a house the light turns off.  I go through the doorway the other way (to the outside) the light turns on. Conditions: It has to be able to do this through cloth as the flashlight could be in my pocket. It can only work when you walk through the doorway but not when standing near the doorway Does anything like this exist?  if yes what is it called? I have been searching the 'net and not been successful as I don't have a clue what I am looking for. Any help would be greatly appreciated. Thanks for reading my post! TheLastPrincess

Posted by TheLastPrincess 7 years ago  |  last reply 7 years ago


Wireless, Wireless, WIRELESS! Help with circuits

Heyall, I just have a seemingly easy problem, but apparently it's not. Everything out there is wireless, doorbells, your electric car key, the fan control, garages, my bike speedometer. With so many wireless circuits, why is it so difficult to find a cheap, inexpensive circuit that a hobbyist can make? No, I didn't mean buy a circuit then mod it. I've searched all over and it's so hard to find a simple wireless solution that includes both a RX and a TX. I've seen Xbee but that's something I would have to use with my Arduino. It's also not exactly 'cheap'. So that get's crossed off the list. Are there any schematics for simple wireless RX/TX button or two that works up to 50 feet? What about schematics for a wireless circuit that works up to 100 feet? For my RC plane I have this TINY receiver that has six channels. The transmitter isn't that big either and it works up to 1 mile! But instead of paying 25 bucks for 1 mile and 6 channels, what about 1 or 2 channels for a 10 dollar circuit? See what I'm jabbing at? I don't want to by a doorbell then start unsoldering stuff from board to mod it! With so many wireless applications out there this should be a walk in the park! If you can give help me I would GREATLY appreciate that! Thanks!

Posted by HavocRC 5 years ago  |  last reply 5 years ago