LASER Transmitter/Receiver


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This set of two circuits from the basis for a very simple light wave transmitter. A LASER beam is modulated and then aimed at a receiver that demodulates the signal and then presents the information (voice, data, etc..). The whole thing is very easy to build and requires no specialized parts execpt for the LASER itself. LASERs are available from MWK Industries.

CAUTION:LASER RADIATION CAUTION:LASER RADIATION CAUTION:LASER RADIATION CAUTION:LASER RADIATION

Schematic Of Transmitter

Schematic for LASER transmitter

Schematic Of Receiver

Schematic for LASER receiver

Parts

Part
Total Qty.
Description
Substitutions
C1, C220.1uf Ceramic Disc Capacitor
C31100uf 25V Electrolytic Capacitor
R11100K Ohm 1/4W Resistor
R211M Ohm 1/4W Resistor
R3110K Pot
Q11NPN Phototransistor
U11741 Op Amp
U21LM386 Audio Amp
SPKR118 Ohm Speaker
T118 Ohm:2K Audio Transformer
MISC1Wire, Board, Knob For R3, LASER Tube and Power Supply

Notes

  1. In the transmitter schematic, no ballast resistor is shown because most small LASER power supplies already have one built in. Yours may differ, and a resistor may be needed.
  2. The receiver should be kept away from bright lights. You may want to put a piece of wax paper in front of Q1 to keep the LASER from swamping it.
  3. In order to get any decent amount of modulation, you may need to drive T1 with more then a watt.
  4. The circuit can be made to transmit computer data with the use of two modem chips.

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Comments

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ADEEBA RAFIQ
LASER Transmitter/Receiver
Thursday, October 13, 2016 12:44:01 PM
HELLO Mr Shahid Manzoor , I am also working on the same PROJECT as my Final Year Project , (student of electronics engineering at PAF-KIET) I have some queries and i reuqest you to guide me about my queries/ confusions related to this project .. so can you please contact me on my personal email or give me your personal email address so i can contact you easily .. Please do reply me.. A.S.A.P. THANK YOU REGARDS, ADEEBA RAFIQ
Shahid Manzoor
LASER Transmitter/Receiver
Saturday, November 23, 2013 5:28:33 AM
This is to inform all of you that I already tried this project and i am successful. I have submitted it as my final year University project in which I succered 100% marks. Only few amendment I have made to the both Transmitter & the Receiver circuits. In Transmitter I used 1-Ordinary Laser Pointer instead of Laser Tube and 2-Audio Transformer of 8:1000 Ohms instead of 8:2000 Ohms. And at Receiver Circuit 1-Ordinary LDR instead of NPN Photo transistor. And apply totally two different power sources to the Circuits of TX & RX. If Any Body Needs Help Then Leave A Message For Me In This Regard.
anonymous
LASER Transmitter/Receiver
Monday, August 05, 2013 12:33:37 PM
can u suggest which class laser do i need to use and which is reasonable in cost
zinabu
LASER Transmitter/Receiver
Friday, July 26, 2013 7:28:20 AM
in my receiver part i have got a problem of voltage drop at U2 sorry may you help me to find the solution
Birendra Suwal
LASER Transmitter/Receiver
Thursday, June 07, 2012 8:31:15 AM
i am trying to demonstrate this transmission as my 1st semester project. i build-up the transmitter using 555-timer circuit and receiver as u mentioned but its quite not working. I had used l14f1 qt840 photo-transistor; is it appropriate to use it? what you suggest me to do? i try to get the audio transformer of 8-2000 ohms but i couldn't get it on market which one can replace it?
anonymous
LASER
Tuesday, December 14, 2010 10:26:31 AM
is there a class of laser that is needed? like a minimum of a class BII?
anonymous
LASER Transmitter/Receiver
Friday, August 27, 2010 8:11:38 AM
Hi how can i add a small mic to the transmitter circuit? Thank You
Aon
LASER Transmitter/Receiver
Tuesday, March 02, 2010 7:02:46 AM
i am using the same concept to modulate a red laser at 2.5khz and recieve it 100m with a light sensor to count a hit or a miss.The problem is that it works fine in the dark but with sunlight it doesnt..any idea as to WHY???(is my laser getting saturated(decreased intensity) or is it the noise due to the sunlight?) any ideas on how to solve this problem?? can i get an off-the-shelf laser TX/Rx module that is immune to daylight with 100m range??
s.barthez
LASER Transmitter/Receiver
Sunday, December 13, 2009 3:29:03 PM
i need help for my project. i have two analog signals to send (i must use 2 transmitter device and 1 receiver device : according to the project) so i dont know how can i spread at the end of receiver.
naveen reddy
LASER Transmitter/Receiver
Monday, August 24, 2009 1:08:00 PM
hello sir, could you send the brief explanation on this project,because i was prepare one power point presentation on this topic.
anonymous
LASER Transmitter/Receiver
Monday, August 24, 2009 12:01:46 AM
the circuit its work but if you need some more special aplication so need a more sophisticated circuit . this is a very basic circuit to show how it works the theory . don be ox
govind
LASER Transmitter/Receiver
Saturday, August 15, 2009 8:31:18 PM
hi i need a help because i have struck in the middle of the project. i have a problem in transmitter circuit & problem is with the circuit before laser part nd i got this circuit from efymag so please help me
anonymous
LASER Transmitter/Receiver
Tuesday, June 09, 2009 5:01:40 PM
Why not simply wire the audio signal through the batteries of a pen-laser, and pick them up on a small solar panel soldered to RCA jacks? Does the same job for $10...I built one years ago after reflecting a laser off a window, receiving it on a solar panel, and realizing that the sound I picked up was just the modified wavelength of the beam...It was the sound of my family talking inside!
anonymous
LASER Transmitter/Receiver
Tuesday, March 03, 2009 1:18:49 AM
FIRST:IF YUO WANT TO TRANSTIMT VOICE OR A SIGNAL YUO NEED TO MODULATE..DE LASER BEAM ITS ONLY A CAREER..SEAR FOR AM OR FM ..ITS THE SEAME BUT WITH LIGTH SECOND :I THINK THAT YUO CAN DO THIS WHIT A CHEAP LASER POINTER, MODULATED WITH A 555 ..AND STUFF LIKE THAT 3:FOR ALL OF YUO THAT DONT UNDESTAND ..THAT I REALLY RECOMEND TO LEAR ELECTRONICS..AND REALLY THE FORREST MIMS iii COLECTION BOOKS (ALL STUFF FROM RADIOSHACK)ARE REALLY COOL..A LOT OF IMPRESIVE CIRCUIT AND VERY SIMPLE...WELL LIKE OTHERS OF CORSE 4:I AGREE THAT PLAY WITH LASER TUBE , HIGH POWER LASER ..ITS A LITTLE RISKI..JAAA..SO..LEANR FIRST AND PLAY BEFORE.. BE THE WAY...TRANSMIT DATA WITH LASER HAVE SOME PROBLEMS:THEY NEED TO BE COLIMATED ..YUO KNOW LIKE A LINE AND A TARGET ... SORRY BUT I DONT SEE ANY MODEM IN THE MATERIALL LIST...:U1,U2 ARE VERY COMONE CHIPS AND CHEP TOO, AND AUDIO TRANSFORMER ITS NOT A MODEM.. THE CIRCUIT ITS NICE ..BUT I DONT KNOW THAT ITS REALY WORKS...REALY I DONT KNOW NOTHING!!BYE HUMANS...
Frank in Fla.
LASER Transmitter/Receiver
Thursday, December 18, 2008 10:36:44 AM
I noticed that the single power supply method is used for U1. Should not pin 3 be connected to a half-rail voltage divider circuit? Does this work as it is? F.M.
janani
LASER Transmitter/Receiver
Friday, August 15, 2008 7:03:40 AM
what are the advantages of using lasertorch in voice transmitter & receiver
phyominhtoon
LASER Transmitter/Receiver
Tuesday, July 01, 2008 11:57:19 AM
I don't know about LASER Tube
anonymous
LASER Transmitter/Receiver
Saturday, June 21, 2008 5:04:55 AM
my brother once showed me tht he cud cut paper using a normal LASER we get in t market, as a pointer.. has ne1 else heard of this or wud u kno how to create it...
Eugene
LASER Transmitter/Receiver
Saturday, June 14, 2008 11:59:02 AM
has anyone used this laser/receiver/detector in light language say to be connected to a laptop.? Does the audio have light pulse carrier send/receive capability? Would our # pulses of light translate into sound? If the laser is detected is there anyway to send the correct response intelligently. MRUW
shahid
LASER Transmitter/Receiver
Monday, May 26, 2008 8:17:05 AM
show me the pcb of laser transmitter?
john paul rairata
LASER Transmitter/Receiver
Tuesday, May 20, 2008 8:14:36 AM
what is th 2 modem chips???????????
anonymous
LASER Transmitter/Receiver
Thursday, May 08, 2008 3:19:12 AM
Can someone please tell me how do a laser torch - based voice transmitter and receiver works ?
Mick
LASER Transmitter/Receiver
Wednesday, May 07, 2008 11:53:37 PM
What is it with all these students that don't know shit about electronics. If you can't figure out how to transmit data with this schematic so nicely laid out for you then maybe you shouldn't be playing with lasers.
john paul rairata
LASER Transmitter/Receiver
Sunday, May 04, 2008 8:23:12 AM
thank you for simple diagram...i want to use this to trnsmit data to my com.........how it work? and what are 2 modem chips thnks again
anonymous
LASER Transmitter/Receiver
Monday, April 28, 2008 5:41:04 PM
Replace the laser they show with a laser pointer. Oh, and if you simply hook it up to a headphone jack you eliminate the need for a speaker as well,as a pair of headphones will act the same. As shown, this mother is costing about $400-$500 scitoys.com has a better explaination

(Editor's notes: $400-$500?)

anonymous
LASER Transmitter/Receiver
Thursday, April 17, 2008 8:42:37 PM
how close are to today's light transmitters and receivers to those conceived by Feynman almost 50 years ago???
anu.c.j
LASER Transmitter/Receiver
Saturday, March 15, 2008 6:57:45 AM
i am very happy in this moment.because i want to make a laser project.this circuit is suitable for these project.thank you
Ross
LASER Transmitter/Receiver
Saturday, February 23, 2008 6:25:30 AM
this might be the thing that i need. Unless it is an amplitude modulation circuit. pls send and email to me if you have any idea on how to construct a laser FM audio circuit. thanks. btw, i am a Computer systems Engineering student in De La Salle University Manila.
v.vinoth
LASER Transmitter/Receiver
Thursday, February 21, 2008 5:22:46 AM
respeted sir, you didn't give any detailed about laser beam on your text and how it will work?
anonymous
LASER Transmitter/Receiver
Tuesday, February 12, 2008 10:14:25 AM
please, would u suggest what are the applications and advantages of this?
pkumar
LASER Transmitter/Receiver
Sunday, January 20, 2008 1:35:09 AM
hai sir i am pkumar, please would you give brief description about this circuit.Has like to do seminar on this project.
student
LASER Transmitter/Receiver
Saturday, January 19, 2008 1:15:31 AM
u said that the circuit can be made to transmit computer data using modem chips.. how exactly do we do that? i am doing a project on a related topic so it would be helpful if i could get some detail on this aspect.
David
LASER Transmitter/Receiver
Thursday, January 17, 2008 11:04:54 PM
I'm currently doing a high speed video camera. I need a photodetector to detect the laser pointer light and have a TTL output. May i know this circuit is suitable for this application or anyone here can tell me how to make it because i'm a mechanical student. Your kindly reply will be appreciated.
sammy
LASER Transmitter/Receiver
Sunday, January 06, 2008 12:18:12 PM
Please can you help me with a transceiver for outoor broadcasting and will prefere the frequency in the UHF band thank you.
Ramdawg
LASER Transmitter/Receiver
Friday, December 28, 2007 11:27:13 PM
To all the laser tube that is on the schematic seems to be a HeNe laser tube. Dangerous if you don't use caution. You would not want to use this type of laser and receiver due to the exposer of the laser you only need one mili watt of power to burn your eye balls. This type of laser typicaly operates at a 675 nm wave and putts out an average output power of 4.5 mW. These types of lasers are way too expensive to play with on the weekend avg cost is about 800 bucks. Best thing to use is a laser pointer to activate the receiver you build. Good luck
rina
LASER Transmitter/Receiver
Friday, December 14, 2007 3:02:53 AM
can this technology be applicable in a "counter" principle? eg . count of the number of people who enter an establishment?
ravi
LASER Transmitter/Receiver
Friday, December 07, 2007 2:09:02 AM
bad circuit
anonymous
LASER Transmitter/Receiver
Wednesday, November 07, 2007 3:11:48 AM
i need to know sources which can provide me with important and relevant informations regarding transmitter/receiver for a anti theft detector.
anonymous
LASER Transmitter/Receiver
Monday, October 29, 2007 1:47:54 PM
what is the laser tube...how much is it and where do i get it i tryed the website above but it doesn't work
anonymous Hemant
LASER Transmitter/Receiver Laser based intruder alarm
Saturday, October 27, 2007 3:40:22 AM
i select it as my minor project
anonymous
LASER Transmitter/Receiver
Friday, October 26, 2007 1:29:40 PM
can ne one tell me abt laser tube usd in laser transmiter and reciever...its pics wud b of great help ...i cant find it in market so need help..........plz help meeeeeee........wat kind f supply does it require...
EDE
Transmitter/Receiver
Monday, October 22, 2007 1:50:31 PM
I NEED A SIMPLE TRANSCEIVER CIRCUIT WHICH I CAN BUILD TO HELP THE BLIND IN MOVING AROUND
Murali Daren
LASER Transmitter/Receiver
Friday, October 19, 2007 4:46:43 AM
Im a final year student who currently conducting a final year project regarding laser bounce window....a system where transmits laser and bounces back when it hits a reflecting material. Any vibration the laser detact could be sensed in the receiver and it will be converted to its corresponding sound. My question is....how is it possible that a laser could carry this type of sound vibration. Which theory does explain it well? What s the characteristic of the laser which able it to bahave in such away.
anonymous
LASER Transmitter/Receiver
Wednesday, October 17, 2007 6:57:39 AM
could this circuit be used in long jump when the athete steps over the line
anonymous
LASER Transmitter/Receiver
Saturday, October 13, 2007 2:42:27 AM
i think you could use pen lasers with this... just set voltages that wont burn it out...
deepa
LASER Transmitter/Receiver
Friday, October 12, 2007 11:12:47 AM
hai am stud , if u can please send some details about laser torch based voice transmitter and receiver
puneet
LASER Transmitter/Receiver
Thursday, October 11, 2007 5:33:37 AM
plz tell me about laser tube specification and pcb layoot
Razaq Aliu Alabinonymous
LASER Transmitter/Receiver
Tuesday, October 09, 2007 1:02:09 PM
I'm an MTech student of OAU Ile-Ife in Osun state, Nigeria. I need a circuit diagram of a tranceiver that can detect illegal electricity consumption at a remote distance say 500 meters away. It should consist of various componenets such as a coder and a decoder in order to trip-off the exact meter if such is detected

(Editor's notes: Do your own homework.)

zaheer
LASER Transmitter/Receiver
Wednesday, October 03, 2007 7:17:02 AM
sir, can u please tell us the true specafacations for the Laser tube like co2 or type or what wattage..??? & where we can get & how much approxmatly cost....???....
Drew
LASER Transmitter/Receiver
Wednesday, September 26, 2007 8:25:56 PM
HI i am a student and for my senior project i would like to build a laser bugler alarm could some one help show me how to do it.
laya
LASER Transmitter/Receiver
Wednesday, September 26, 2007 1:47:17 AM
hi i am student 4th year sudent i have a project aboat laser transmitter/reciever. can you send me some project obout this?
laya
LASER Transmitter/Receiver
Tuesday, September 25, 2007 6:53:23 AM
i want to know about laser transmitt/reciever
harsh tripathi
LASER Transmitter/Receiver
Thursday, September 20, 2007 10:40:17 AM
Sir, Your reciever circuit is very clear cut arrangement but in transmitter circuit it is a problem.It is not confirmed that from which point modulated laser beam is coming out of the system for propagation in environment.Secondly,is the transmitter is capable to work at 220V ? or at lab supply ? thirdly it will be good if modulating circuit inside the laser tube is also explained.I need your proper guidence and doubt clearence in this project as soon as possible.
harsh tripathi
LASER Transmitter/Receiver
Saturday, September 15, 2007 10:14:49 AM
If possible then plz mail me pcb layout of these circuits.Further I want to know that according to your arrangement only one person can transmit the data,is it possible to transmit the different signal from 4 persons through one beam and recieved by 4 person at other end ? If it is true then send me the details about circuits and theory about it including multiplexing,a-d convertor,d-a convertor or whatever,as soon as possilble.

(Editor's notes: If PC board patterns are not shown in the page, then they are not available.)

Rody Vyster
laser based intruder alarm..
Wednesday, September 12, 2007 2:30:49 PM
hi I'm a degree student in final year..I'm doing the project building security system using laser...what sensor can i use to detect the laser beam? can i use Light On relay or Dark on relay or u have better suggestion..
DHEERAJ KALRA
LASER Transmitter/Receiver
Monday, September 10, 2007 11:43:35 PM
hello sir ! i m a 4th year student . i have a project in this year. i want to make a project on the laser communation. can you send some project regarding this?
HARSH TRIPATHI
LASER Transmitter/Receiver
Sunday, September 09, 2007 10:01:46 AM
Sir I am student ob B.Tech final year of E.C.branchproject and want to make a low cost and high quality project on Laser transmitter and recievers,up to 5000/-.So properly guide me
irfan
LASER Transmitter/Receiver
Thursday, September 06, 2007 2:01:17 PM
the working circuit i found and made it... its truely amazing upto 500 meters it can work seearch on google "www.electronics foru.com laser torch transmitter"
matilal pal
LASER Transmitter/Receiver
Tuesday, September 04, 2007 1:30:56 AM
The Supply voltage of the Transmitter has not been shown. Shall it be 220 V ? I think C3 should be connected to the left out PINs of the flourescent Lamp . Please send Mail.
ABHI
LASER Transmitter/Receiver
Saturday, September 01, 2007 1:09:28 AM
hello sir ! i m a 3rd year student . i have a project in this year. i want to make a project on the laser communation. can you send some project regarding this? your loving tudent
anonymous
simple laser based intruder alarm
Saturday, September 01, 2007 1:07:19 AM
can you give me the most simplese circuit for constructing this alarm using laser
leela krishna
LASER Transmitter/Receiver
Thursday, August 30, 2007 3:37:03 AM
sir it was really very nice and i decided to use this as my mini project....so please send the more details and other applications....
Ms Thida Win
Pulse Frequency Modulated Infrared Communicatior
Sunday, August 26, 2007 2:09:28 PM
Dear Sir I am Electronic 1st year student. I would like to make the project on Pulse Frequency Modulated Infrared Communicator. So pls send me the enough detail about transmitter and reciever. Thank you ....i m waiting.
Shollexy
LASER Transmitter/Receiver
Wednesday, August 22, 2007 4:00:13 PM
Hi, I am a final year student preparing for a final year project which is to be summitted to my supervisor as soon as possible. i came across this project (LASER Transmitter/Receiver) and i will really love to do the project. so, i will be grateful if u can give me an update on how to go about it. thanks, shollexy.
prajapati raghuvir i.
LASER Transmitter/Receiver
Tuesday, August 07, 2007 1:27:15 AM
hello sir, i am ec 3rd year student.we have a project in this semester.so i would like to make the project on laser communication.so pls send me the enough detail about transmitter and reciever with ckt specification......................................thank you ....i m waiting
cris doodz
LASER Transmitter/Receiver
Saturday, August 04, 2007 11:14:31 PM
i actually not try to build the circuit but the theory is will defined.i guess it will work.
rody
LASER Transmitter/Receiver
Sunday, July 29, 2007 10:36:29 AM
sir i am a third year engineerin student.. i would like to prepare a model of a laser transmitter an receiver... i am an amatuer in this field.. plz do specify how does one go abt the design an the assembly an workin...
shahrilaznam
LASER Transmitter/Receiver
Monday, July 16, 2007 11:46:11 PM
i'm in a final year project, but i still couldn't find the transmitter circuit for me to interface it with PIC. My project is called 'robotic communication control system'. Sir, please mail me the best transmitter circuitry.
gaurav singh
LASER Transmitter/Receiver
Friday, July 13, 2007 5:39:41 AM
sir, i have to present a seminar on audio link using laser transmitter and reciver ,sir please can you mail me the complete working of this circuit. i
anonymous
LASER Transmitter/Receiver
Friday, July 13, 2007 5:31:45 AM
i am not able to see the cicuit working
yogesh
LASER Transmitter/Receiver
Friday, July 13, 2007 12:26:49 AM
i want the exact theory about this article also i want the exact working of this circuit & particularly where it is used with ex.
raul
LASER Transmitter/Receiver
Tuesday, July 10, 2007 10:15:13 AM
Dear Sir, hw do i include a measuring circuit in the transmitter and reciever circuit. I have a project on laser which will be able to measure distance...could you kindly please tell me more.. I'm desperately in need and assistance. Thank you very much
mohammad
LASER Transmitter/Receiver
Wednesday, July 04, 2007 6:42:12 PM
although it is simple ,it doesn't mean it doesn't work. me my self love THIS kind of circuit.
selvam
LASER Transmitter/Receiver
Wednesday, July 04, 2007 4:09:07 AM
i want the exact working of this circuit
selvam
LASER Transmitter/Receiver
Wednesday, July 04, 2007 4:06:56 AM
i want the exact theory about this article.you didn't particularly mention high voltage thank you
anonymous
LASER Transmitter/Receiver
Thursday, June 21, 2007 10:45:59 AM
hi.....plz tell me the working of laser transmitter and receiver!!!!
devesh
LASER Transmitter/Receiver
Friday, June 15, 2007 11:09:06 AM
give some infomation about its working.........
Jack li
LASER Transmitter/Receiver
Tuesday, June 12, 2007 10:25:25 AM
Dear sir. now I need some information(circuit and Principle) about the laser transmiter and laser redeiver . Regards
Vishwas.d.s
LASER Transmitter/Receiver
Friday, June 08, 2007 12:12:45 PM
Dear sir, Plz send me a circuit of transmeter and reciver the one they use in remote cars. Thanks for the co-operation. Regards, Vishwas
jitendra kumar
LASER Transmitter/Receiver
Saturday, May 19, 2007 4:57:40 AM
Hi ... I need the advice of you experts in clarifying my doubt with regard to the instruments that can detect laser pulses. I understand that not all forms of laser are visible. If a laser source directs a laser beam on to a target and if the laser beam is not visible, then how do we make sure that the laser beam hits the target ? Is there an instrument that we can use around the target to see if there is any laser beam directed towards it ? I need this information as a priliminary information for my project. If you know the instrument that can detect laser pulses, please let me know. Any help and advice in this regard is highly appreciated. Regards
anonymous
LASER Transmitter/Receiver
Friday, May 04, 2007 2:43:07 PM
Can we just use a LED instead of a laser?
Jean-jacques Kress
LASER Transmitter/Receiver
Friday, May 04, 2007 4:06:14 AM
Bonjour!Can i have precisions about the phototransistor which may be used for transmitting audio.?Specially on which side is to connect emitor and collector?Thank you.
saurab
LASER Transmitter/Receiver
Thursday, April 26, 2007 7:19:41 AM
can anyone tell me about Laser Transceiver IC which is easily available in Delhi?
sv
LASER Transmitter/Receiver/detector
Sunday, April 22, 2007 11:13:27 AM
Hi ... I need the advice of you experts in clarifying my doubt with regard to the instruments that can detect laser pulses. I understand that not all forms of laser are visible. If a laser source directs a laser beam on to a target and if the laser beam is not visible, then how do we make sure that the laser beam hits the target ? Is there an instrument that we can use around the target to see if there is any laser beam directed towards it ? I need this information as a priliminary information for my project. If you know the instrument that can detect laser pulses, please let me know. Any help and advice in this regard is highly appreciated. Regards, sv
alfred
LASER Transmitter/Receiver
Friday, April 20, 2007 9:28:46 AM
hi i need hi power laser can effect in metal
Josh
LASER Transmitter/Receiver
Thursday, April 12, 2007 6:17:29 PM
hey i need a laser to heat things up with. how do i do this?
Mohamad reza Abed
LASER Transmitter/Receiver
Monday, April 09, 2007 7:34:27 AM
Hi I want to design laser receiver circuit by a diod or optic. I am studying farm machinery in Tehran university in Iran . today laser instrument uses in farm equipment such as laser land leveler,land scraper. if you want to help me ,please mail to my address. Bye.
anonymous
LASER Transmitter/Receiver
Friday, April 06, 2007 12:57:09 AM
I am doing project using ICLF356 & ICLM567 Q2N2222
ismail mazighi
LASER Transmitter/Receiver
Thursday, March 22, 2007 1:43:23 PM
lTM8848 informations
s.v.krishnareddy
LASER Transmitter/Receiver
Saturday, March 03, 2007 10:43:47 AM
nice
mohamed abdou elhamady
LASER Transmitter/Receiver
Saturday, March 03, 2007 3:33:23 AM
i think that all founded circuits are very good and helpful for all people but it need to explain more than that we need to show how circuits works and why we choose this components which introduce this circuit and all circuits
Vinay
LASER Transmitter/Receiver
Thursday, March 01, 2007 5:09:40 AM
average project
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