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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

Question by hyper2020    |  last reply


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.

Topic by FrenchCrawler    |  last reply


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 ?

Topic by tingtong74    |  last reply


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 ?

Question by sutek  


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

Topic by corerat  


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.

Topic by Qcks    |  last reply


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.

Topic by WhiteThatch    |  last reply


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!

Topic by senica    |  last reply


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!

Topic by Login258    |  last reply


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?

Question by nccwarp9    |  last reply


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

Topic by trytrytryagain    |  last reply


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

Topic by dialmformostyn    |  last reply


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

Question by moto-ed    |  last reply


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.

Question by mrmerino    |  last reply


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.

Question by saadland    |  last reply


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?

Question by connoboarder    |  last reply


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

Question by FarmerKJS    |  last reply


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

Question by CrLz    |  last reply


RF Module signal is too weak

Hello everyone! I am trying to build an arduino RF remote control to clone my remote control for my wireless sockets. I bought this RF module from ebay http://www.ebay.com/itm/New-433Mhz-RF-transmitter-module-and-receiver-link-kit-for-Arduino-ARM-MCU-WL-/140847542952?pt=LH_DefaultDomain_0&hash;=item20cb2af2a8 At first I thought it was damaged because I wasn't getting any signal from the reciever. After many tries I touched the reciever with the remote and suddenly I got the codes (I want to recieve the codes, save them and then re-transmit them with the arduino). The same goes with the transmitter - the only way it works is when I hold it against my wireless socket. It means that the codes work but the signal is way too weak. I tried hooking it up to different power sources- Arduino 5V, Arduino 3V, 12V 1000mA Adapter, and the original battery of the remote that states 12V 23A. I tried making an antenna but nothing really works.. please help! thank you..

Question by Tzabary    |  last reply


The best way to boost an RF transmitter?

Hi all, Here I have a small and simple FM transmitter based on a simple transistor oscillator, however, due its simplicity, is weak for my needs: I need to transmit the signal to a distance of about 33 feet. Notice that I will use the transmitter in a rural location and around the building there are no other houses, so I will avoid the risk to cause interferences to other people. Well, so I was thinking to implement an amplification stage, after the transmitter, and I ended up with the following schematic: http://s23.postimg.org/5o8kycjrv/Oscillator_and_Amplifier.png On the base of Q1 I have a female jack where i get the audio signal from an MP3 player. However I have some doubts about resistors values for the amp stage: these values seems too much great to me: I get the Transistor values (BFR36) from the datasheet: http://www15.zippyshare.com/d/nmSyQm6e/625003/BFR36.pdf and I calculated the values here http://www.vk2zay.net/calculators/transistors/bjtBiasing.php (choosing "desing given emitter voltage") The power supply, as shown in the schematic will be equal to 12 V DC. But as I've said I'm not very convinced of resistors values for the amp stage, which seems too much greats. On the other hand, due to the fact that the amp stage is an emitter follower, it will just amplify the current and not the voltage: would be able to give a decent boost on the signal output? What I can expect? Thanks.

Question by akopelumenuscu    |  last reply


RF Transmitting Shock Alarm Clock

I thought of an idea awhile back but I lack the "know how" to pull it off. I've been trying to teach myself some basic electrical and computer engineering but i'm still not learning what i need to know in order to finish my project. as stated in the Title, i'm trying to build an alarm clock that wakes up its subject with a jolt of electricity rather then noise, vibrations or anything else. the concept is to incorporate a miniaturized TENS unit (Transcutaneous electrical nerve stimulation) http://en.wikipedia.org/wiki/Transcutaneous_electrical_nerve_stimulation into an arm band or ankle bracelet sort of thing but comfortable. then when it is time to wake up the alarm clock then sends a signal to the arm/ankle band thus making it active. then to turn it off you would hit the off switch on the alarm clock not the band.  that is the extent of my crude invention, however i am having trouble with the transmitting part. what would i need to make this happen?? i was thinking of using an old car remote for some of the parts and using the overall idea of it in my alarm clock except i need a transmitter and receiver and i have NO idea how any of that works. thoughts? ideas? please let me know

Question by fireball9919    |  last reply


how to make an rf remote controller?

How does a rf remote works imean its principle and how to match transmitter and receiver

Question by avinash reddy    |  last reply


how to make rf transmitter receiver ?

Can any geek there explain me how to make rf tranmitter receiver using avr atmega series

Question by RohitSharma  


converting bluetooth message to rf 433mhz?

Can Arduino convert the incoming message from bluetooth frequency to Rf 433Mhz and then retransmit it at this frequency? if yes then are all arduino shields capable of doing this? 

Question by christian.badua3    |  last reply


IR / RF control, payment for help.

So im working on a project at the moment, combining IR and RF control onto one circuit. The design is, 4 buttons, 2 hold up to 10 IR codes, and 2 hold up to 10 RF.They also all each have a sound effect when pressed 2 times.When held down, it enters programming mode, RF and IR, cloning the button pressed on some other remote.When pressed 1 time, each button will execute every code programmed on it (IR or RF buttons)IF you can help and need more info to help me, if its something you can do, please contact me through a email.MORRIS2896@GMAIL.COMKind regardsbutton 1= up to 10 IR code store, and double pressed = FX warping sound, with power LED torch button 2= up to 10 RF code store, and double pressed = (5 sec delay) FX futuristic alarm. button 3=up to 10 IR code store, and double pressed = FX searching bleep sound, fast to slow occurring button 4=up to 10 RF code store, and double pressed = FX mine scanning bloop

Question by JoshuaM57  


Range finder using RF and an arduino?

One of the projects I've been spit-balling for a very long time requires me to be able to build some sort of range finder (if I'm using the correct term). Basically, I would like to create a "finder" unit and a "hider" unit[s]. My thought would be to us RF of some sort, so the "hider" unit will spit out a certain frequency, that the "finder" will pick up and react to (in this case, speed up the blinking of some LED's and turn some servo's to set levels). This doesn't need to be exact. So long as I can detect a decent range so I have a cold, warm, warmer, and on fire points to use, it'll do the desired deed. Price is another factor, as I would like to keep this around the ballpark of $30 per unit.  Thanks in advance!! 

Question by DoctorWoo    |  last reply


Arduino + RF to create item/finder?

IDEA 1. I've got the idea to create this kind of project where people nowadays being careless and misplace their item. So to counter this problem, i want to create a device which can detect the object/item within an area/radius of the receiver and transmitter. 2. This is not only for item/object but also can be placed on your children just in case they are away from you thus this device can alert you in sound, sight ( blinking LED ) , and vibration. PROBLEM 1. Is it possible to only use 1 transmitter and receiver? 2. Just in case for future uses, can compass be implanted in this device where it will always shows to the transmitter? 3. Currently programming are very hard for me, where can i get reference for programming this kind of device?

Question by Isaace11    |  last reply


Virtualwire RF 433mhz Voltage problem

Hi, i am trying to have it switch a 5v relay on pin 8 receiver side only when pin 2 transmitter side in held down. I have set up a XY-MK 5v transmitter , Push button to pin 2 live when pushed 3.3v Data rf transmitter to pin 4 and 5v,gnd and receiver, data pin 2 5v and gnd led to pin 8 and gnd Here are the codes. Transmitter Code= #include const int button = 2; const int transmit_pin = 4; const int receive_pin = 2; const int transmit_en_pin = 3; void setup() {   // Initialise the IO and ISR   Serial.begin(9600);   vw_set_tx_pin(transmit_pin);   vw_set_rx_pin(receive_pin);   vw_set_ptt_pin(transmit_en_pin);   vw_set_ptt_inverted(true); // Required for DR3100   vw_setup(2000);  // Bits per sec } byte count = 1; void loop() {   char msg[7] = {'h','e','l','l','o',' ','#'};   if     (digitalRead(button) == HIGH)   {Serial.println("on its way");   msg[6] = count;   //digitalWrite(led_pin, HIGH); // Flash a light to show transmitting   vw_send((uint8_t *)msg, 7);   Serial.println("on its way");   vw_wait_tx(); // Wait until the whole message is gone   //digitalWrite(led_pin, LOW);   //delay(1000);   count = count + 1; } } And receiver code = #include const int led_pin = 8; const int transmit_pin = 12; const int receive_pin = 2; const int transmit_en_pin = 3; void setup() {     delay(1000);     Serial.begin(9600); // Debugging only     Serial.println("setup");     // Initialise the IO and ISR     vw_set_tx_pin(transmit_pin);     vw_set_rx_pin(receive_pin);     vw_set_ptt_pin(transmit_en_pin);     vw_set_ptt_inverted(true); // Required for DR3100     vw_setup(2000);  // Bits per sec     vw_rx_start();       // Start the receiver PLL running } void loop() {     uint8_t buf[VW_MAX_MESSAGE_LEN];     uint8_t buflen = VW_MAX_MESSAGE_LEN;     if (vw_get_message(buf, &buflen;)) // Non-blocking     { int i;         digitalWrite(led_pin, HIGH); // Flash a light to show received good message // Message with a good checksum received, print it. Serial.print("Got: "); for (i = 0; i < buflen; i++) {      Serial.print(buf[i], HEX);      Serial.print(' '); } Serial.println();         digitalWrite(led_pin, LOW);     } } I have tried many different codes i have found and this works the best but.........the voltage is only going from 0.20v to 0.40 on the receiver pin 8. i need this to be 5v any ideas?

Topic by Senken    |  last reply



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?

Question by diyuser    |  last reply


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. 

Question by gflow    |  last reply



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

Question by rioangel09    |  last reply


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?!?!!

Topic by SamuelG122  


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??

Question by shinojmahe    |  last reply


Schematics for a one way RF Relay/Switch?

So my plan is to have a small remote with a single pushbutton that when pressed will close a relay on the reciver, I would like it to have a pretty good range of at least 1000 Meters. I thought of using XBees and Arduinos but i only need the signal one way and only a single channel. Any ideas?

Topic by tomtortoise    |  last reply


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?

Topic by FrankA2    |  last reply


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?

Question by Xyphion.    |  last reply


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 ?

Topic by walidj    |  last reply


An Transmitted RF-powered LED WARNING light?

The Situation: I am a disabled Veteran with too much time to fill.  So, I volunteer at the Sheriff's Office doing light clerical work and a little target shooting, but my first love is HAM radio.  It is a GREAT hobby!  It is not without its hazards, though.  My main transmitting antenna is a ground-mounted vertical in the back yard.  We have six children with four still at home and while my kids know to NEVER touch my antennas due to the danger of electrical shock and nasty RF burns, their friends in the neighborhood may not fully comprehend the hazard. The Challenge (if you choose to accept it): So, what I'd like to do is to have a circuit out on the post supporting the antenna that would light LEDs, (preferably, four), whenever I key the mike - AND - have the entire circuit use the power from my own transmission... no power supply or batteries!   It would also simply be a cool thing to have! The Specs: This is a vertical for the HF bands, from 7MHz to 30MHz and I typically transmit at 100 watts.  The circuit would be at a distance of no more than six inches from the active element.  I have seen crystal radio circuits in the past that used received RF to power a LED but don't remember where.

Topic by Bama-Bull    |  last reply


How to activate a relay with a 433mhz RF board?

I have a raspberry pi set up which already activates a relay via GPIO. Right now I want to activate a relay wirelessly to turn a light off and on. What would I have to do to use a 433mhz board(transmitter at the pi, receiver at the relay) to turn the light on and off? Or if there is an easier to do this then I'd much rather hear about that. Thank you.

Question by CalebS8    |  last reply


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

Topic by Senken  


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/?

Question by zosim    |  last reply


how to control robot using RF module?

Hi,I'm new to robotics ...I'm building a robot which consists L293D motor driver which drives two dc motors .The problem is how to control it using RF module???

Question by kausdaware    |  last reply


How to make a Rf controlled small siren?

I need to make a small battery powered loud(120dB+) electronic siren that is turned "on/off" by a key FOB type RF remote. I am currently trying to train my dog to not dig holes, etc, and need a small siren that can fit on her harness collar. I need to be able to push a button on the remote to make the siren wail, until I release the button. remote needs to be RF not IR. Any ideas?

Question by wolfsmane    |  last reply


Rf motion sensor connected to USB receiver

I am JUST getting into home builds and i want someone that can help me or make one for me.. I want a motion sensor device that can send a signal to a USB receiver.. I then want the usb receiver to inturpert the signal and do something .. - like open or toggle a program on that computer... ultimately it would be a cubical boss alert device.. when it detects motion it automatically flips my application! :) Any takers? Ryan

Topic by rmwilson  


Fabric welding, no sew, hf/rf welding

Howdy folks, I've got a question that I hope someone might be able to help me with.  I'm interesting in creating a way to "weld" fabric together.  Basically taking two pieces of fabric, using heat, pressure and "glue" attach them together.  Think of Nike footwear and there sewless uppers. Anyone out there done anything like this DIY style?  I've got a number of projects that I could create from it. Thanks in advance, TOM

Topic by thmsbender    |  last reply


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

Question by pro2xy    |  last reply


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?

Question by chriswillb    |  last reply


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 

Question by harish.rahman.75    |  last reply