Search for emmiting in Topics


What would be best to carry light emmited from a gauntlet to the back of my skull (Bane Costume)? Answered

I already have dissasembled a old Light-saber for the Light, I was thinking rubber-tubing but that failed, does anyone have brilliance where i am drawing a blank?

Question    |  last reply


Fairchild LEDs?

Can someone show me where I can buy Fairchild LEDs? Preferably the 5mm kind. I know they are not cheap. I want 100 or less if possible. The Fairchild website is a bit confusing for me, and I have to buy in big bulks.

Question by vitruvian8807  


Focus an LED

I was wondering if anyone knew how to focus more than one LED (infra red) into one tightish (about 1m at 100ms) beam. This would actually be for a laser tag gun that i would like to make an instructable about. The game is based on these high powered infrared leds that are focused by a 2cm-5cm diameter double convex lens assembly. Snipers obviously need further distance and have a tight beam while others have a much wider beam. The focus can be adjusted by moving the led back or forwards. Having more than one LED may lead to dramatic leaps in range (so it is theorised). I have been told to use cube beam splitter but i don't even know what they are. Thanks community any help is seriously much appreciated Thankyou Thankyou Thankyou Thankyou

Topic by DELETED_D4VOBRO  


Does anyone know how to make a wifi antenna continusly emmit a signal for a science experiment?

I need it to emmit for about a month non stop at full/ almost full power. Hopefully non expensive and energy efficient. I have a wifi thing from a laptop that I can use, or I can buy a wifi router from a store.

Question by ANDY!    |  last reply


Can a 2N3055 transistor be operated at voltages under 60v ? Answered

Can the minimum collector emiter sustaining voltage of a transistor be more than the power supply voltage or is that somthing else? For example can I run a transistor with a minimum collector emmiter sustaining voltage of 100 with a 12 volt power supply ? Thanks

Question by build a BOOM    |  last reply


Can you guys think of any recommend instructables that uses a basic on/off keyswitch, an IR emmiter or a tilt switch?

I have a on/off keyswitch, a IR emmiter and a tilt switch lying about gathering dust. Im looking for something cool to do with them; It doesnt have to invole all the components. Can you think of anything cool to do with them or recommend a instructable that uses them?

Question by prodlad    |  last reply


make a reprogrammable ir tv remote

Im very new to programing microchips. i have been programing in visual basic 2008 for a few months now. I'v heard about this function in irshell for the psp, that actualluy lets you make new ir codes basicly you point the remote's ir emmiter to the psp's push a button on the remote and the code is writen on the psp to let the psp emmit at the same code that the remote emmits. So thats got me thinking can i build a circut that does the same job as the psp irshell. Scince im new to programming i would like to know if this is possible if so i woud like a scimatic, source code and the components needed for this project. please i need help and of cource when i get the circut working i will definatly make a instructable.

Topic by lj123456  


how exactly do transistors work? in detail.? Answered

 i need to know about how applying a positive charge to the base allows electrons to flow through it to the emmiter. npn

Question by 2tautges    |  last reply


can you reprogram a universal remote by aming the remote att the curcut ? Answered

Im very new to programing microchips. i have been programing in visual basic 2008 for a few months now. I'v heard about this function in irshell for the psp, that actualluy lets you make new ir codes basicly you point the remote's ir emmiter to the psp's push a button on the remote and the code is writen on the psp to let the psp emmit at the same code that the remote emmits. So thats got me thinking can i build a circut that does the same job as the psp irshell. Scince im new to programming i would like to know if this is possible if so i woud like a scimatic, source code and the components needed for this project. please i need help and of cource when i get the circut working i will definatly make a instructable.

Question by lj123456    |  last reply


can we make a cheap alternative to wiimote with a webcam and a IR emmiter for PC controlling?

Hey guys, I've been wondering... if the Wiimote is basically an infrared camera with g-sensors and buttons that connects via bluetooth, and reads the IR light from a couple of leds... and knowing that any webcam can be modded to become an IR-only cam.... and that with the use of simple IR leds and a wiimote you can make a smart whiteboard.... would it be possible to somehow develop a way to use a modded IR webcam and a handheld IR emmiter -like a wand- to perform like a mouse-like controller for your PC?

Question by Erwin Troncoso    |  last reply


How would I make a simple Infrared Heater?

I am planning on build ing IR Heater. would a 6 millimeter IR emmiter with 960 millimeter wavelength work to produce heat? If your not aware with IR heaters then here is a short explanation: A normal heater such as a gas heater heats up the surrounding air, but a IR heater uses infrared waves to heat up surfaces of objects. So instead of heating surrounding air the IR waves heat up surfaces of objects. Also IR waves penetrate the epidermise (top layer of skin). Here is a diagram of what the circuit looks like. The question is would this circuit work? Also are 6millimeter IR emmiter with 960 millimeter wavelength work?

Question by planetroverrobo    |  last reply


How to imbed a small sonic beeper on a plastic wristband

I would like to find a sonic chip that emits sonic or ultra sonic noise and mount into my pvc bracelets. Can someone tell me where to buy very small emmiters? under one inch in diameter? Thank you. Diane C

Topic by chapper    |  last reply


how to make my computer perv-proof ? Answered

Well my circle jerker brother and other people keep looking at pronz on my computer i want it to stop now because im pissed off that i cant keep a work only pc that keeps being violated by a bunch of testosterone emmiting 5 star fart bag circle jerkong numbnut perverted oil slickers help me now

Question by albylovesscience    |  last reply


IR Robot Control

The cheapest way of wirelessly controlling a robot is IR, right? I'm in need of help for a schematic for an emitter and a reciever (this will be my first IR project). Please don't tell me to google it because I've been looking around and all I've found were vague schematics. I'd probably want to use a 555 timer for the emitter, but the schematics were vague again. For the reciever would I have to use 4, along with 4 emitters to drive 2 motors independently? As in Motor1 front and back, Motor2 front and back?

Topic by guyfrom7up    |  last reply


Arduino car following an IR led signal

Hi every respectful member of Instructables,i've an assignment from my university, to create a 2 wheel car which will have a IR reciever on it, and from a small distance there will be an IR led which will emit an Infrared signal, and that car have to follow that signal to reach there( on the point of where the led will be placed).i have searched the whole Internet but couldn't find anything. i hope you guys can help me with this issue.cheers thanks in advance

Question by tamm2018    |  last reply


IR LED's, and the blood stream? Answered

Hey I am in the process of trying out a circuit that will act as a portable pluse checker. I was hoping on using the IR LED's to reflect light from the clot of blood and if it bounces off (which it should) it will be picked up by a IR Detector. The whole project rests on the question if the IR light will bounce off the blood in my veins, and if it will be picked up by the detector. So i ask you....will this work? Please keep in mind I am trying to keep the project simple, so no programming would be great!

Question by TXTCLA55    |  last reply


Grid follower robot(analog sensors and digital sensors)?

OK first of all I am under time constraint (just 4 days to make a grid follower) Ok I have built a line follower before (two ir sensors and arduino), So now the problem is ,we have two sensors which we have made using ir emmiters and sensors (which work as analog ,ie no relay) We have now purchased two IR modules which has got a relay giving it a digital output. So I am asking how we should place these sensors to get the least wobling and correct 90deg turns

Question by cthaliyath    |  last reply


sound-only area and cancellation

I'm looking for advice. (now this is difficult to explain but I'll try my best) I am trying to design a way to have a dance floor in an open area that will have an area where you can hear the music but away from the area it can't be heard. I'm attempting to do this using an array of speakers around the dance floor that will cancel out the music past the dance floor. Each speaker will face away from the area and be equipped with a microphone (directed torwards the main speaker) that then goes through and amplifier and then to the speaker (wired up so that it will emmit an opposing sound wave). This would essentially create a sound barier. I have attatched a picture as a visual aid.

Topic by Sun Gear  


how can i turn a magnetron from a microwave into a herf gun? Answered

Hello i am feeling particularily creative at the moment and would like to go down to the beach and pick coconuts from the coconut trees, using a herf ray , in which i would blow up the coconuts with the microwaves being emmited from the magnetron. what i want to know though, as it seems to be missing from every single webpage which mentions the construction of a herf ray using a magnetron is, how exactly would i set up the magnetron so that it would create a directional beam capable of frying a coconut abbout 10-30m off the ground? i have seen this being done by a guy on the beach before, making the coconuts explode using a herf ray, when i asked this person how he was doing it he simply said that he was using a microwave gun made from a microwave also, i have no intension of climbing the trees to get the coconuts

Question by oldmanbeefjerky    |  last reply


trail counter Help

Ok I need some help. I am a trail steward on a local mountain bike trail. We want to make a counter so we can find out how many folks are using the trail. I thouhgt I had a good idea, but can't seem to make it work. I have access to a bunch of garge door photo sensors(neighbors a garage door tech), and a bunch of thoes pocket pedometers(got them from a manager of a Mcdonalds when they stopped giving them out). I have figured out how to make the pocket counters work as just plain counters thanks to another instructable (remove hammer, wire across with a switch or relay...). What I have not been able to figure out is how to use the garage door sensors to make the circuit work. All I need is for the circuit to make a relay close to act as the switch for the counter. I was able to do it with an LED emmiter and detector and it's circuit, but for soome reason I guess the garage door sensors have something inside their glued box that won't let it work with the circuit. Any ideas?

Topic by Tate65    |  last reply


I am trying to find out why I need a 2 Watt resistor with a 3 Volt 700 milliamp Current LED? Answered

Hello: My name is Charles and I am 51 years old,all of this Computer Technology is all NEW to me as I am OLD SCHOOL if you know what I mean.I have had a Nervous Breakdown due to Stress,and have lost a lot of my Technical Memory.I am trying to pick back up on the Electronics for a pass-time,but things don't seem to make sense like they did before.I wanted to know how I can ask questions I have about the Electronics I am wanting to work on.As of right now,I need to see if someone can explain when using OHM's Law (Power is equal to Voltage of your Input times the Current needed in your Circuit).I have a 3 Watt Red L.E.D. which should run at 2.5-3.0 Volts with a 700 Milliamp Current.If using a 3 Volt supply times .700 would equal a 2.18 Watt Power for the Resistor.That does not sound right to use a 4 Ohm - 2 Watt Resistor for a 3 Volt Input.Is this really right or have I gotten confused somewhere?Thank you very much if you can help me out,Sincerely Charles.

Question by wccolvin    |  last reply


Projection TV, all in one entertainment center

I have been playing around with the idea of a rear projection TV as a full all in one entertainment center. As most know rear projection TV's are large and very hollow. My idea is to add a mini-ITX motherboard, a Hard drive, a webcam, 2 USB ports on the front, an IR reciever, and a multi-microphone array. I may also add IR emmiters for use with a will remote, audio ports for a surround sound system, Light sensors to adjust brightness. My TV also has a Memory Stick reader that i want to use for the computer instead.  The motherboard and HDD fit in the base just right with plenty of room to stack a few drives if needed. and there is plenty of room for other accessories if needed. There is a door on the front of the TV with an extra input, with space for USB Ports. The IR reciever for the TV I think should fit a second. If not I will use some sort of repeater to split the input between the 2. although the TV's remote may not be needed at all. The Micro ITX board I have been looking at has a mini PCI port with a laptop style WIFI card, I plan so get some of the antennas used with a laptop and mount them as close to the top as I can get them. and maybe add a bluetooth/wifi card as well. The camera will be an internal laptop camera mounted at the top. The light sensor will be mounted ether on the front or on the top. (I think front will be better.) The microphones will be mounted on top near the camera. One on ether side. Thats the easy stuff. The hard part I want is for the computer to turn the TV on and off with itself. This requires something that will look at the state of the TV. (using the power LED inputs) and close the power button for a second if it needs it. 

Topic by jpayton    |  last reply


Sequential Loops for Pin Activation?

Hi, I am starting with Arduino and I am in need of some help. I am trying to sequentially activate 5 pins. I need each pin to be active for 20 seconds in a PWM manner. During their active period I want an arduino sensor to read out the signals emmited by each pin effector. So far I have no problems with the PWM or sensing module code. However I am not able to find how to correctly sequentially activate the pins. I used millis(), etc, but so far I was able to only activate / read the signals from the first pin effector. The sketch doesn´t proceed to the 2nd --- pins. I really very much appreciate your help....Here goes the code so far... const int greenPin = 11; const int redPin = 10; const int irPin = 5; const int bluePin = 6; const int yellowPin = 9; const int outputLDR = 12; const int ldrSensor = A0; int brightness = 0; int increment = 1; int readingoutputLDR = 0; void setup() {   pinMode(greenPin, OUTPUT);   pinMode(redPin, OUTPUT);   pinMode(irPin, OUTPUT);   pinMode(bluePin, OUTPUT);   pinMode(yellowPin, OUTPUT);   Serial.begin(9600);     setup_parallax(); } void loop() { digitalWrite(outputLDR, HIGH); readingoutputLDR = analogRead(ldrSensor); while (millis()<5000)                 {                                       if(brightness > 255)                    {                     increment = -1; // count down after reaching 255                    }                    else if(brightness < 1)                    {                    increment = 1; // count up after dropping back down to 0                    }                    brightness = brightness + increment;                                                        analogWrite(greenPin, brightness); digitalWrite(redPin, LOW); digitalWrite(irPin, LOW); digitalWrite(bluePin, LOW); digitalWrite(yellowPin, LOW);                    Serial.print("Reading Green"); parallax_output();                                     } delay(1); while (millis()<5000)                 {                                       if(brightness > 255)                    {                     increment = -1; // count down after reaching 255                    }                    else if(brightness < 1)                    {                    increment = 1; // count up after dropping back down to 0                    }                    brightness = brightness + increment;                    delay(1);                    digitalWrite(greenPin, LOW); analogWrite(redPin, brightness); digitalWrite(irPin, LOW); digitalWrite(bluePin, LOW); digitalWrite(yellowPin, LOW);                   Serial.print("Reading Red"); parallax_output();                                  }   while (millis()<5000)                 {                                       if(brightness > 255)                    {                     increment = -1; // count down after reaching 255                    }                    else if(brightness < 1)                    {                    increment = 1; // count up after dropping back down to 0                    }                    brightness = brightness + increment;                    delay(1);                    digitalWrite(greenPin, LOW); digitalWrite(redPin, LOW); analogWrite(irPin, brightness); digitalWrite(bluePin, LOW); digitalWrite(yellowPin, LOW);                     Serial.print("Reading IR"); parallax_output();                                  } while (millis()<5000)                 {                                       if(brightness > 255)                    {                     increment = -1; // count down after reaching 255                    }                    else if(brightness < 1)                    {                    increment = 1; // count up after dropping back down to 0                    }                    brightness = brightness + increment;                    delay(1);                    digitalWrite(greenPin, LOW); digitalWrite(redPin, LOW); digitalWrite(irPin, LOW); analogWrite(bluePin, brightness); digitalWrite(yellowPin, LOW);                    Serial.print("Reading Blue"); parallax_output();                                  } while (millis()<5000)                 {                                       if(brightness > 255)                    {                     increment = -1; // count down after reaching 255                    }                    else if(brightness < 1)                    {                    increment = 1; // count up after dropping back down to 0                    }                    brightness = brightness + increment;                    delay(1);                    digitalWrite(greenPin, LOW); digitalWrite(redPin, LOW); digitalWrite(irPin, LOW); digitalWrite(bluePin, LOW); analogWrite(yellowPin, brightness);                   Serial.print("Reading Yellow"); parallax_output();                                  } } void parallax_output() {                    Serial.print("DATA,DATE,TIME,");                                                                Serial.println(readingoutputLDR);                    } void setup_parallax() {     Serial.println("CLEARDATA");     Serial.println("LABEL,Date,Time,Green Response, Red Response, IR Response, Blue Response, Yellow Response"); }

Question by aureta    |  last reply