decoder ?

Hello , I  am going to make  decoder  for micro controller ,   I want to know how does decoder make for  microcontroller I have 4 registers I =Instruction Register A= Address register R1= register R1 R2 =register R2 Logic 0= deactivate Logic 1= activate I     A   R1    R2        out 1   1    1         0            1     //  mov R1 1   1    0          1           1     // mov R2 I AR1R2        out 0000                 0000000000000001 0001                 0000000000000010 0010              0000000000000100 0011              0000000000001000 0100             0000000000010000 0101             0000000000100000  0110             0000000001000000  0111            0000000010000000  1000            0000000100000000   1001             0000001000000000 1010             0000010000000000 1011            0000100000000000 1100            0001000000000000 1101            0010000000000000 1110            0100000000000000 1111           1000000000000000 If I know input than how to know what will decode ?

Question by vead   |  last reply


decoder and encoder

What the mathematics for base64 compared to our base10 system and for writing a base64decoder and encoder with perl that dosent olny work for numbers but also text

Topic by cris1133   |  last reply


Qr decoder for blackberry?

I have a Blackberry curve 8310, i have the upcode qr decoder but it doesnt work when i try to take a picture, it activates the camera but then it doesnt decode the picture, is there a decoder i can use with my phone that someone can tell me about?

Question by coldpsyco91   |  last reply


How can I temporarily disable either this decoder or counter? Answered

Http://pdf1.alldatasheet.com/datasheet-pdf/view/12613/ONSEMI/74LS168.html     -counter http://pdf1.alldatasheet.com/datasheet-pdf/view/12657/ONSEMI/74LS42.html        -decoder I'm using these two in a circuit to make a dot move left and right across a row on an led matrix. I only want the led to light up on the last row. Another counter-decoder system activates each row. How can I make the dot light up only on the last row by deactivating the counter or decoder for the left-right system. By "deactivating" I mean that I want the decoder to produce all active high signals on the other rows.

Question by mastr924   |  last reply


Embedded video solutions

I'm working on a project that requires the playing of short videos based on some physical conditions. The microcontroller and more general electronic end of stuff I'm fine with. What I haven't yet figured out is the mechanics of the video player mechanism. I want to use digital video stored on removable media (preferably CF or similar memory card storage). The videos will have no sound, be black & white, and probably low resolution (640x480 being the max size). I had originally planned to use an embedded linux system (gumstix verdex or some such thing) hooked to a TFT display. With some software running on the computer, it shouldn't be hard to control with serial communication. However, I'm not sure how well (if at all) mplayer would run on the Verdex. Also, if there's a cheaper solution I'd rather take that. I guess this post is to see what my options are. I know there are mp3 decoders on a chip (like the STA013) that produce output that you feed more or less directly into a DAC. Is there such a thing as a hardware mpeg video decoder (or divx, or quicktime, or avi, or whatever?) If something like that existed, I could connect the CF reader straight through my uC to the hardware decoder and pipe it out directly. Either to LCD or CRT (depending on which signal is easier). So, does this exist? Is it feasible? Thanks,

Topic by deadbilly   |  last reply


Plastic Screen Media Decoder

Hi Guys. I've seen a print ad that had a plastic 'zigzaggy' decoder gizmo stuck to it,  that I could peel off and use to 'decode' media as I slid the plastic over my screen, over a particular picture on their website.  The refraction of the plastic would 'decode' the image. What on earth would this kind of mechanism be called?  I'm trying to Google 'something' of a how-to... Not having found anything, I'm turning to the craftiest bunch I know ;) Thanks for your help.

Topic by Saeven   |  last reply


outputs for dtmf decoder ic?

How to get 16 outputs from a mt8870 dtmf decoder ic  will this circuit works ?

Question by Mayoogh_Girish   |  last reply


Arduino Morse Code decoder?

I want to make an arduino morse code decoder, which will print the result on a 16x2 LCD. The input will be 3 button, 2 will be the "_" and "." respectively, the 3rd one will be the "space" button, when press will decode the code which was input. If input was wrong then it will display a "?" mark. And it should be able to decode many character at once. Anyone have some idea or code about this? I'm just getting started with microcontroller for about 1 months so I have a bit of knowledge about how they should work, but this prove to be quite challenging for me

Question by Mad Fox   |  last reply


Is it true I need a 7448 chip if I'm using a common cathode 7 segment display?

At the moment, I have a 7447 decoder chip connected to a 7 segment display with two common ground connections on it. However, it's not working, and I read somewhere that you need a 7448 decoder chip to power a common cathode 7 segment display. Is that true?

Question by Ke-Bob   |  last reply



Need help with DMX512 to Analog 0-10VDC Decoder

I am looking to *update* some old strobe lights that my theater uses to be able to control them through our DMX control board.  They have 2 analog 0-10V inputs to control the flash rate and the intensity.  I am looking for the simplest solution as we do not have a lot of money to throw at this project.  I have some experience in electronics as well as working with arduino, but not enough to tackle this job by myself.   Any thoughts on this would be appreciated!  Attaching the control spec sheet. Tom

Topic by AJackOfAllTrades   |  last reply


Arduino output multiplier: What's a good way to get more pins on my Arduino?

I want more outputs for my Arduino Duemilanove. I want to run a simple 16x16 LED matrix but I'd need more pins. Most instructions I find use one of several chips such as the 7442 1 of 10 decoder IC, another option might be a couple of 4017 decade counters. Can anybody recommend a method that is widely used and well documented?

Question by snotty   |  last reply


4221 BCD to 7-Segment decoder

I'm looking for a 4221 BCD (not 8421) to 7-seg decoder IC. To be honest, I just want to copy the logic diagram to work on an assignment for my VHDL class. I can't find any ICs like this on google! Do they not exist? For what reason? Thanks, Daniel

Topic by samurai1200   |  last reply


What are the "Enable Input" pins on a decoder? Answered

I'm trying to multiplex with an arduino and a 74HC238N decoder. on the datasheet I was looking at I saw that besides the 8 outputs, 3 inputs, GND and Vcc there were also 3 "Inable Input" pins, that I couldn't figure out what they do. Can somebody please explain? Thanks. 

Question by yonch   |  last reply


Want to learn image encoding & decoding????

I remember how i learned html css xml by opening files in notepad also I remember once i tried to open a 1X1pixels .bmp image in hex editor but it was all blur everything went above my head i was not able to locate magic no. & changing some string made it invalid file. So in short i want a book/ website/ instructable or anything which can teach me to edit image file by watching them in base 16 or base 2 languages or somthing like that . also if there is nothing just tell me the easiest encoded image format maybe i get lucky trying myself. Thanks in advance

Topic by Atul009   |  last reply


8 bit processor ?

8 bit processor main component for processor ALU 8 bit decoder multiplexer Q1 I have option for decoder  decoder 2 to 4 decoder 3 to 8 which decoder circuit  I need for 8 bit processor Q2 I have option for multiplexer multiplexer 2 to 1 multiplexer 4 to 1 multiplexer 8 to 1 which multiplexer  circuit  I need for 8 bit processor  

Question by vead   |  last reply



How to program the decoded data received by an IR sensor in arduino?

I need to use the decoded data to turn on/off LEDs. I already have the command and control codes of the IR transmitter I am going to use. IR sensor is TSOP1738 and transmitter will most probably be a remote using RC5 protocol. The thing is I dont know how to program the decoded data from the sensor. This data is need for me to turn on/off LEDs. Its like if switch 1 in the transmitter is pressed LED1 should glow. If pressed again it should be off. Likewise for 3 or more LEDs. I am using an arduino board with ATMEGA8 on it.

Question by dinu.ds007   |  last reply


7 segment sed driver/decoder circuit help

Ive looked all over, and have already tried 3 circuits, but none work. They have either the wrong ic, wrong led display, etc. So, I want to make a circuit that, by using a decoder, I can flip 4 dip switches and make the display make certain numbers. I have a 7447 ic, common cathode led display, but I can only either find a circuit with a 7447 and a common anode, or a circuit with a common cathode but a different decoder (a latch/decoder/driver). Here is the first site I tried:http://www.allaboutcircuits.com/vol_6/chpt_7/9.htmlAnd when I finally flip the switches, nothing happens even though I made it exactly as shown. But it has a CMOS, so thats probably a big problem. I also tried this site:http://www.atilim.edu.tr/~hkar/lab5.htmBut it has a common anode, and when I tried it it didnt work. I have exactly ELS321HDB. And I have a power unit that can go from 5 - 18 volts. Can anyone show me how to make this? Im not too good yet at reading circuit diagrams, because I seem to make it way more complex then it should be.

Question by 101yummYYummy101   |  last reply


de-code this

Try to decode this,there is one word here: thcnedrcrpoac

Topic by iproberry1   |  last reply


Decoding and understanding what your SDR scanner is receiving!?

For some reason, every time I upgrade my antenna I get more signals on my screen that I fail to decode or even understand.When I started this hobby it was mostly about voice transmissions and trying to get radio stations from overseas.Now I am starting to wonder what is behind these endless amounts of transmissions that my software fails to decode or recognise.Some things like TV, pure data or trunked system like the P25 are usually not a problem to identify.An awful lot though is not recognised at all.Also found quite a few signals that produce sound that just isn't right.No matter what type of audio is selected thest I describe these sounds is like weird space sounds with a lot of echo in them.Like a base tone that goes up and down in frequency and is overlapped by blips and beeps.I am not good at all with Linux.You could say Linux and I are like a cat and a dog locked in the same room ;)So I only used the common programs available for SDR decoding use that work with Windows.I guess my question would be:Is there a software out there that can identify the received signal automatically?You know, if doubt be routing the audio to it and getting something back like "Encrypted P25, LoRa data, DVB-T,....".And for whatever is not recognised directly at least something to help identifying the signal.A lot can be done by just researching the frequency allocations.At least down here they are quite strict and that means if you find some info that a certain frequency is reserved for data transmission on short range you can tick them off.The ideal thing of course would be something that works automatically as a complete packet.But I guess that will be a few more years till we get that pleasure :(

Question by Downunder35m 


Decode Custom RF ASK Signal with Arduino & RadioHead

I have a remote that sends out a preamble, a pause and then a long code where a 0 is encoded as 100 and 1 is encoded as 110. I used an RTL-SDR to decoded the aforementioned ASK signal. I know the code is correct because I can simulate the signal using an Arduino and FS1000A. I simply connected the FS1000A's data pin to a digital pin and then I send out the signal. What I want to do is actually receiving the signal on the Arduino, i.e. which button was pressed on which remote (there are multiple remotes). For that I am using an XY-MK-5V and the Radiohead library. I used the RH_ASK driver sample code. However, it doesn't receive anything at all, meaning nothing is printed to the serial monitor.I think there are a couple of issues, i.e. it seem the Radiohead library expects a different preamble then what my remote sends and it also expects a checksum which my remote also doesn't seem to send. I haven't found a way to configure Radiohead so it can deal with my remote code. Is such a configuration possible. If not, what are the alternatives?

Topic by muludu 


Midi interface using the Breakout Board for MIDI Decoder

I was wondering where it went because I cant find it anymore? I almost had all the parts.

Topic by Abbaheart 


i want to know how connection of 4 -16 decoder. in this where i give input which will see on oneoff output pin?

I used demux 4 to16,in this i connect 16 led to output of demux . my input is 1 and 0. 

Question by vijaysinha   |  last reply


electronic/mechanical/ LED-Radio-Decoder Wedding rings?

Hey there,my future wife and I are looking for some fancy wedding rings. Well, we're both geeks, so it should be something that involves electricity or a nifty function ;-)Unfortunaly she's allergic to some metal components often used in steel or gold/silver, so titan or something like that would be more suitable. Aluminum or some plastics would work too, i guess.Thats the problem right there. Even if we'd find something online or a store that makes rings, they'll probably not work with titan since its harder to work with.I found some LED rings athttp://www.flashingblinkylights.com/aurora-color-changing-led-ring-sku-no-10209.htmhttp://www.timhunkin.com/32_jewellery.htmhttp://www.lightupshop.com/resources/lightupshop/html/products_LIJW_1.htmlbut as allways the problem is the metal and of course power.A battery would either have to be replacable or rechargable ;D (capacitor? but even a low current led wont even flash up with a tiny capacitor?)A solarcell so tiny it'll fit ontop of a ring without looking redicoulus would not be efficient enough I'dd guess.Of course, as previously stated, it could be something mechanical (as http://www.switzerwatch.com/product_info.php?language=en&viID;[4]=30&products;_id=1297 for example)A nifty idea would be if the rings would actually do something when brought together (magnetism, induction, mechanism).I also had the idea of the rings morsing the date every few minutes on radio, much like http://www.mcmanis.com/chuck/robotics/projects/eelb.htmlif all fails we'll just look into something cool to engrave (there are rings with laser engraved fingerprints as example) or we'll just embed a electronic part such as a resitor with a value representing the day we've met or such.ANY (cool) ideas apreceated, especialy about LEDs, sources/shops, adresses to shops customizing, and so on (but please, nothing over 50-200 bucks, we're not rich).I hope you guys / gals dont start to laugh at us now. We cant help it. We just want something unique and not a golden ring with some diamond. Some people really have rings that look ugly! Well, geeky LEDs do too, but at least they do something ;-)

Topic by schorhr   |  last reply


Steganography message in this gif image?

I'm working on a puzzle and there is a hidden message in this .gif.  I tried using a program called "Hide in Picture" to decode it but I haven't had any luck.  The password is Pluto.  Can anybody give me a hand? Here's the .gif: http://apairofpuzzlers.webs.com/GC1T4BF/shore.gif

Question by iPodGuy   |  last reply


how many dc motors can be controlled using dtmf decoder mt8870 ?

I am making a mobile controlled robot project using dtmf decoder ic i want to control 11 motors is it  possible and how which motor driver should i use and can i use atmega 8 or 16 

Question by townyw   |  last reply


is there a pushbutton ir remote using arduino?

Ive been trying to make a 3 button IR remote using arduino to work with my tv (or anything with a remote) and have a decoder already, if theres a pushbutton ir remote code out there even for just 1 button, i can always ajust my decoder to work with any code i just need a code to work with

Question by dudesurge   |  last reply


Secret code program?

does any body have A secret code encoder/decoder written in basic

Question by neeley   |  last reply


Is this schematic CORRECT?

PLZ  anyone check this sch  it is the sch for mt8870 dtmf decoder  i wanted 16 outputs  is this sch correct  i dint place the crystal and other components

Question by Mayoogh   |  last reply



What is the best code approach to add infrared control to an existing program?

I designed a scrolling message board that is PIC based. I have also written separate code to decode an infrared signal. What is the best way to add the infra code to the message board software. Should it be interrupt the scrolling message every time a character is receiver by the IR receiver? The are 32 bits that need to be decoded each time a key is hit on the IR transmitter.

Question by bronx68 


Arduino Base64 encoding problem

I have a value that in a later step will be base64 decoded with some other values. The problem is that the input range for this value is from 0 to 10000 - so outside the 255 for base64. The line causing me the headache is from a Python script but the math for the Arduino are the same: NewValue = (((OldValue - OldMin) * NewRange) / OldRange) + NewMin OldValue can be between 0 and 10000 OldMin = 0 New range can be between 600 and 10000 OldRange can be between 0 and 255 NewMin can be between 400 and 1000 OldValue is used within the base64 decoding process like this: base64_decode(OldValue, &cmdbuffer;[bufindr][strchr_pointer - cmdbuffer[bufindr] + 1], line_raw_length); As this value is outside the 255 range I need a way to split OldValue into a low and high byte in a way usable for the above base64 decoding. I found some code that should be able to split but have no real clue how to implement it so it does work. Here is the splitting code I found: #include using namespace std; #define BYTE_T uint8_t #define TWOBYTE_T uint16_t #define LOWBYTE(x)          ((BYTE_T)x) #define HIGHBYTE(x)         ((TWOBYTE_T)x >> 0x8) #define BYTE_COMBINE(h, l)  (((BYTE_T)h << 0x8) + (BYTE_T)l) int main() {     // an array with 16-bit integers     uint16_t values[5] = {1, 2, 3, 4, 65535};     // split the 16-bit integers into an array of 8-bit ones     uint8_t split_values[10]; // notice that you need an array twice as big (16/8 = 2)     int val_count = 0;     for (int i=0; i<10; i+=2) {         split_values[i] = HIGHBYTE(values[val_count]);         split_values[i+1] = LOWBYTE(values[val_count]);         val_count++;     }     // base64 encode the 8-bit values, then decode them back     // or do whatever you want with them that requires 8-bit numbers     // then reunite the 8-bit integers to the original array of 16-bit ones     uint16_t restored[5];     int rest_count = 0;     for (int i=0; i<10; i+=2) {         restored[rest_count] = BYTE_COMBINE(split_values[i], split_values[i+1]);         rest_count++;     }     for (const auto &i; : restored) cout << i << " ";     cout << endl;     return 0; } In the original code and with all values just between 0 and 255 the decoding works just fine. But I had to increase the range for these values so OldValue can be anywhere between 0 and 10000. Is there any (if possible simple) way to get the decoding done properly? Or is there anything working I can replace the base64 encoding / decoding with? (problem here is that it has to work with Python and Arduino :( )

Question by Downunder35m   |  last reply


Plz anybody check this Schematic correct or not?

It is the sch for mt8870 dtmf decoder i wanted 16 outputs is this sch correct i dint place the crystal and other components

Question by Mayoogh   |  last reply


FM Transmitter: Please help decode diagram/power properly (Mandarin or Catonese would be helpful)

I just need to figure out how to power this thing! Notice the positive marks in both upper corners, the negative in both lower? The large circle is the microphone, which is fully wired. The smaller circle is the frequency modulation, which is all set as well. The underside only has holes where the gray squares are and is otherwise clean (exception being one spot where the two mounting prongs of the microphone pushed through.) Thanks

Topic by owhy   |  last reply



12v and 5v Power Supply from 240v Answered

I am creating a home automation device that uses an arduino. The devices are connected to a relay. The real problem is I am using a using a DTMF decoder with the relay, while the relay works only with 12v power supply the DTMF decoder works only on 5v input (USB from computer to arduino). The devices that I know of are capable of converting a 240 v to 12v or 5v not both. What should be done so that I am able to get a 12v and a 5v from a normal 240v household power socket?

Question by NirmalMRaj   |  last reply


Dim an LED with DMX and Arduino

I need to control a single LED strip from a DMX lighting desk. I'm planning on using an Arduino with a MOSFET and use the analogWrite function to control the brightness (possibly with some capacitors to smooth the dimming process). I want to be able to transfer the 8-bit value from the DMX channel to the 8-bit analogWrite Arduino function. Any tips greatly appreciated as I've struggled to find any tutorials dealing with only one channel and an issue as simple as this. Thanks. UPDATE: I eventually just used an RGB LED strip DMX decoder and used the three different channels for three different LED strips. The project that steveastrouk posted below is now available at: https://www.instructables.com/id/4-Ch-DMX-Dimmer/ I eventually just used an RGB LED strip DMX decoder and used the three different channels for three different LED strips. If I figure a way of doing this with an Arduio, I'll post it here.

Question by theredbryophyte   |  last reply


Boombox Bluetooth mods

I have a JVC RV-NB1 Kaboom Series Boombox and want to mod it with a "Decoder Board USB/TF/ Reader IR Remote Bluetooth/FM Audio Board Module MP3". "Bluetoothing" this box is easy but installing this module involves a bit more ie. usb, TF slot, aux, FM. IR for remote any ideas as to connecting the rest. I can't seem to find a schematic from JVC. It has an FM tuner and can decode mp3,WAV,CDA,FLAC. CD's.Plus I want to add either a LiPo 4200mAh battery or a transformer for charging the module.any ideas would be greatly appreciated. Chuck Reed

Topic by CR34 


Servlet Errors...

Https://www.instructables.com/id/Morse-decoder/ This Instructable causes an error. I have absolutely know idea what it is, but I am logged into my account on the latest Chrome on Windows 7. How do I view the instructable?

Topic by Michael_Bell   |  last reply


how can i make a connection between gsm phone and DTMF decoder?

I've seen the project cell phone operated robot and i'm enthusiastic to do it.(link : https://www.instructables.com/id/Cellphone_operated_Robot/)i have a motorla l6 phone with me and i'm planning to use that in the circuit. It has auto-answer option. But it has an USB port to connect the headset. If i want to use it, is it ok if cut one of the ear phones and connect the wire at the 2nd pin of DTMF IC?The next thing is what is the significance of word "RING" written at the ground in the circuit (left side at the bottom)

Question by vasu1012   |  last reply


7 segment led display driver help?

7 segment sed driver/decoder circuit helpEMAIL FLAGIve looked all over, and have already tried 3 circuits, but none work. They have either the wrong ic, wrong led display, etc. So, I want to make a circuit that, by using a decoder, I can flip 4 dip switches and make the display make certain numbers. I have a 7447 ic, common cathode led display, but I can only either find a circuit with a 7447 and a common anode, or a circuit with a common cathode but a different decoder (a latch/decoder/driver). Here is the first site I tried:http://www.allaboutcircuits.com/vol_6/chpt_7/9.htmlAnd when I finally flip the switches, nothing happens even though I made it exactly as shown. But it has a CMOS, so thats probably a big problem. I also tried this site:http://www.atilim.edu.tr/~hkar/lab5.htmBut it has a common anode, and when I tried it it didnt work. I have exactly ELS321HDB. And I have a power unit that can go from 5 - 18 volts. Can anyone show me how to make this? Im not too good yet at reading circuit diagrams, because I seem to make it way more complex then it should be.

Question by 101yummYYummy101 


accumulator # immediate data ? Answered

Hello , What I need to know  if I want to load the immediate value  into the accumulator accumulator # immediate data accumulator is  8 bit, assume  address of accumulator is  11 10 01 01 temporary register is  8 bit  that hold Immediate data 00 00 00 11 Instruction register example LD A, # 00 00 00 11 this is 2 byte instruction first  byte is 11 10 01 01 second byte is 00 00 00 11 lets assume that first byte is opcode , store into instruction register  This is the first instruction fetch cycle. fetch , decode , and execute how to decode and execute the first byte instruction

Question by vead   |  last reply


QR Codes

Hey, I just found out about QR Codes and stuff and it's pretty cool, and I've been searching google for a while now, but does anybody know if there's software for the samsung u740 that can decode it (it's the phone that flips both ways).

Topic by guyfrom7up 


Problems with the 4511b IC chip??

SO i made a circuit which is a binary adder(using the 4008b) that adds numbers in binary and then passes on the result to a 4511 IC(its a BCD to 7 segment decoder),so basically it adds numbers in binary and displays them in decimal .It seemed to work fine for a while but then suddenly when i tried adding 0011 +0001(3+1) in binary ,it still displayed 0 and then i tried tapping the battery for a second or two and then suddenly the seven segment display shows 4 .The circuitry is all fine and right .but do i have to connect latch enable(pin 5) pin of the Ic?.Both the IC's run on a 9v battery and for the 4511 decoder IC i used 33k pull down resistor .Is my pull down resistor value for the 4511 IC too high ?The binary adder part seems to work very well,its the bcd to 7 segment decoder IC part that I'm very much concerned about.Is there too less power for both the chips to run on?I've not got a single idea at all .so, >PLS help me if you can.

Question by Strontium   |  last reply


verilog code ?

I have made sample code for 4 bit ALU and 3 to 8 decoder to make 4 bit processor . as designer we can design anything so I have started to design processor with two function ALU and decoder 4 bit alu Module alu (a,b,s0,s1,s2 f); Input a,b,s0,s1,s2; Output f; Reg [3:0]; Always @(s0,s1,s2); Begian Case (s0,s1,s2); 3b’000 :f=(a&b;); 3b’001:f= (a|b); 3b’010 :f= ~(a&b;); 3b’011 :f= ~ (a|b); 3b’100:f=(a^b); 3b’101: f=(a*b); 3b’110: f=(a+b); 3b’111:f=(a-b ); End case End module 3to 8 decoder Module decoder (a2,a1,a0, d7,d6,d5,d4,d3,d2,d1,d0); Input a2,a1,a0; Output d7,d6,d5,d4,d3,d2,d1,d0; Wire [7:0]; Always @(a2,a1,a0); Begin Case (a2,a1,a0); 4’b000:( d7,d6,d5,d4,d3,d2,d1,d0)=00000001; 4’001: (d7,d6,d5,d4,d3,d2,d1,d0)=00000010; 4’b010: (d7,d6,d5,d4,d3,d2,d1,d0)=00000100; 4’b011: (d7,d6,d5,d4,d3,d2,d1,d0)=00001000; 4’b100:( d7,d6,d5,d4,d3,d2,d1,d0)=00010000; 4’b101:( d7,d6,d5,d4,d3,d2,d1,d0)=00100000; 4’b110: (d7,d6,d5,d4,d3,d2,d1,d0)=01000000; 4’b111: (d7,d6,d5,d4,d3,d2,d1,d0)=10000000; Endcase Endmodule I don't understand how to connect 4 bit Alu with     3 to 8 bit decoder to make 4 bit processor    

Question by vead   |  last reply


i am wondering if anyone has a way to take the scanner of a printer and use it to send qr codes to the computer ?

But be able to decode them os 3 win 2000 xp and vista i dont want to use the 2000 so any ideas thanks

Question by peanuttherat   |  last reply


Old LED ratings?

I bought a large box of what appears to be New Old Stock (NOS) of electrical parts at a garage sale.  In one box was a bunch of orange LED's and a piece of paper with the following written on it. Ir=6nA Uf=1.92V C=1pF Can anyone decode this for me? Duane

Question by Youtalken2me   |  last reply


wall wart/transformer instead of batteries?

I have recently purchased a creative HQ-2300D and it only accepts two AA batteries for powering the decoder, there is no DC in on it. Can I use a wall adapter to power it? (it really eats batteries)The intended transformer.nokia charger, output is 3.7v = / 355mAhThe reason I am wanting to use a transformer with it, is it would make it a lot easier as it is only used for gaming on the xbox 360 (to get the dolby headphone from the decoder) so it is never used "on the go" so changing the batteries/ recharging them is a mild annoyance I wouldn't have from a transformer turned on when I use the 360. It can't be as simple as wiring pos to pos and neg to neg on the battery terminals inside the decoder with the nokia charger because there is only a slight variation in the voltage.....can it?. I am also concerned about whether the transformer is regulated or not, reversing polarity, correct polarity etc. etc. and what else is important not important when attempting to do such a thing, so as not to destroy my decoder. (I did this before with a minidisc player and a Universal adapter on the wrong voltage, I didn't impress myself..........doh.... anyone smell that....)I tried plugging the nokia charger into another 3v device (an old sony tape deck) that has a 3v DC in, and it didn't seem to give it enough power to turn the tape, but when I plugged in a universal adapter and set it to 3v it worked fine.My idea is to remove the fem connector from the phone and rig it so it can be plugged into one of the battery terminals and the nokia tranny can be plugged into it, but it can still be removed for when I want to use batteries.I put it to all those with the knowledge who can explain in lay-mans terms and educate me on the best, safest, cleanest way to solve my dilemma.Thanks.

Topic by py3m4n   |  last reply


HAM radio repeater controller arduino

Is there anyone who can help me with a repeater controller, i need a little program which will switch according to input + 3 sec (or something like that) also i want to decode 4 bit paralel data (binary output from a DTMF decoder) and switch outputs accordingly (if correct code is pressed) (thins like identifier, time&date;, last transmitted message) thees functions i will make on separate boards, i just have to trigger them last transmission board needs an input from the arduino when to start, the playback will be done with one of the DTMF-code outputs any advise / code is wildly appreciated :) ps, im very new to arduino and have plenty to learn  kind regards, milan 

Topic by milanhofman   |  last reply