Airsoft scope?

I am wondering if I got a good deal. I bought a 2.5x 32mm hunting scope for $5. Also what mounts do I need to attach it to a standard airsoft R.I.S. rail system?

Question by thing 2 8 years ago  |  last reply 8 years ago


knex L96 scope Answered

Okay, I need a little help on a Knex l96 that I am making, and will hopefully post. Any ideas?

Question by The Creatornator 9 years ago  |  last reply 9 years ago


airsoft scope zeroing? Answered

Hey i was just wondering how i should go about zeroing in my new airsoft snipers scope. because they obviously arent like real guns in accuracy so should i just go for as tight a group as possible?

Question by tubanator-2.0 9 years ago  |  last reply 9 years ago


My new scope

I know your all thinking that this looks alot like Dsmans scope. Well its not. Ive had this scope for quite some time now and just recently I got a camera. I made this before dsman. Anyways i think its a cool scope.

Topic by Fresh94 10 years ago  |  last reply 9 years ago


Digital Scope Specs: wfms/s vs. GSa/s vs. Mpts/s vs. bandwidth?

Question say's it all. I understand the concept of analog bandwidth, being that the signal amplitude will be attenuated about 70% at the rated frequency, or something along those lines. I also think I understand the concept of sampling rate, being that the ADC inside the digital scope samples the input voltage level periodically (possibly billions of times per second), and then this gets stored in memory, and displayed. However, then what does the "Mpts/s" figure mean? Is this telling me how many points of the signal can be stored in the memory to be plotted on the screen? how much of this is 'good' and 'good enough'? Also, what about Waveform Capture Rate (wfms/s) I really have no idea for what might be, How it 'waveform' defined? a single period of a repetitive signal, like a ramp wave or triangular wave? Perhaps also a arbitrary wave? What would this tell me? Again, how much of this is 'good' and 'good enough'?

Question by -max- 4 years ago  |  last reply 4 years ago


Is it worth dropping $400 on a really nice oscilloscope (Rigol DS1054Z)?

I will describe my situation: I am a hobbiest that likes to make cool projects, and plan to get into maybe RF analog stuff, (maybe start out with making a few FM bugs, reverse engineer a simple video transmitter kit, and a few other things.) as well get into arduino some more, AC analysis (learn about Xformers, power factor, maybe some math, etc.) and I so currently have an old 2ch. 30MHz analog oscilloscope that is a PITA to make real measurements with. Not only is it huge and takes up a lots of space, but also I'm not even sure it is in cal!) I will be transferring into UVA (or maybe VT) for EE, and gone this summer for a NASA internship at langley. (maybe I will be able to take it with me w/ a toolbox of some electronics stuff!) The scope I am looking at (what appears to be what many subscribers seem to use, and/or claim is pretty good) is the Rigol DS1054Z. I only know how to use my $30 30MHz BKprecision scope I got on craigslist from the son of a father who was a TV repairman, and have NO experience with the use of the fancy-shmancy digital scope! What little I know is from watching EEVblog review of other scopes in the past. (I do know that they can be useful for 'capturing' waveforms, and can be set up to trigger on a pulse, maybe a certain digital codes, and that could come in handy for reverse engineering crap.) https://www.youtube.com/watch?v=7v-tFYbc7h8 https://www.youtube.com/watch?v=W2qdtQkBKhc https://www.youtube.com/watch?v=ETCOhzU1O5A https://www.youtube.com/watch?v=-gStNYfqMXk What sells it to me, being a complete newbie to electronics and digital scopes is that it has a nice big screen, the specs seem good (other certainly think, I have no intuition of what any of those things mean except the bandwidth, and maybe the sampling rate, 1GSa/s), 4 channels, intensity graded display, and it has loads of functions and stuff for me to grow into, and hacking it to make it think it is a DS1104Z is tempting, but I probably will not do that right away. Maybe once I feel what it offered is limiting. The deal breakers is the $400 price, a bit steep for me (cheap for something this good, apparently but still.), the fear that by the time I really start using it, it will be obsolete and the same money can buy some quantum super duper ASIC tech whiz bang 3GHz 100Gsa/s 1GB segmented memory spectacular scope! I am not really sure if it has a source, or signal generator either. Some sources claim that higher end ones do, or certain models anyway, and it seems like the official site say's no. http://www.rigolna.com/products/digital-oscilloscopes/ds1000Z/ds1054z/ That brings me to my next point. Should I also get a decent function generator? 

Question by -max- 4 years ago  |  last reply 4 years ago


Need help with my scope!

Ok, so how do i zero in a scope on my new airsoft sniper rifle? dont want to break it, and have no idea what to do!?

Question by brickman93 8 years ago  |  last reply 8 years ago


scope for knex (real one)

I made the scope using knex and duct tape ok maybe i bought it at Walmart for $8.98 two years ago (Daisy 4x BB) but the point is that that there knex gun is pimped out (its killerks magnum or whatever, only cause it was on hand at the time) I hope to god that no one needs an instuctable for this...

Topic by sethex 11 years ago  |  last reply 11 years ago


How can a choose a spotting scope for my husband when I don't know anything about them.?

I am thinking about getting it for a father's day gift. He would be using it to look out into the fields around our farm spotting wildlife as well as our livestock. I want him to be able to sit and look at the fields using a scope on a tripod. What do I need to know? How do I choose one?

Question by 9 years ago  |  last reply 9 years ago


i have 2 4x zoom scopes on my lazer tag guns does anyone know of anything better i could do

My air-soft guns don't need it and i don't have any BB or real guns.

Question by modaawesome 7 years ago  |  last reply 7 years ago


I need help

I am looking for a scope for my paintball gun and I need some help. My gun is called the MR-1 and was manufactured by Spyder. I have an 18 inch and a 21 inch barrel for sniping but I need a good scope now. The scope should be 30 USD or under that uses a dovetail mount. Thanks in advance for the help.

Topic by Pat Sowers 11 years ago  |  last reply 11 years ago


That didn't just happen, did my oscilloscope die!?!? How??? Repairable????

I went to my workbench today to discover that my BK Precision 30MHz analog scope has stopped working. Symptoms: ❶  Still shows a trace ❷  The trace does draw across the screen*  ❸  The horizontal time base seems to work ❹  10x horizontal magnification seems to work ❻  XY mode only draws in the X direction ❼  Waveforms do not show up, for either chA or chB ❽  Triggering seems to work (it causes the trace to draw more/less frequently. No vertical deflection)  ❾   Vertical controls for both channels have stopped working ❿   Dual trace shows only one trace ⓫   I have not been able to do anything to make the trace move up and down, vertical deflection is definitely shot. ⓬   * When changing the timebase, I noticed that the length of the trace horizontally gets shorter, and when a signal is present, or the vertical position for the appropriate channel is twiddled, it becomes the right length, within certain ranges. ⓭    When I was reaching for a powerstrip to turn off power to the lab the previous night, I heard a loud buzz, similar to that of the degaussing on a old computer monitor, but louder. no sparks or anything were visible as I recall. scared the crap outta-me, and I could not figure out what had happened. First thought was that maybe somewhere there was a live mains exposed somewhere that had shorted to ground or neutral. That was quickly dismissed since nothing was exposed like that, and also it would have popped the circuit breaker, and instead would have sounded like a firecracker. This sounded more like a small transformer failing. Also the same day, I have been messing with a tesla coil circuit (my beefed up slayer exciter) and the probes were sitting here by not connected picking up interference. They were in 10X mode, I do not remember the volts per division, however. I do recall a trace being shown on the display the previous day. With these symptoms, I think the issue has to do with the vertical control on the CRT, and perhaps another, separate issue with the horizontal time base control, or possibly triggering. I think I might do a teardown on it to see if there is anything obvious that has failed, such as a charred coil. Then I will need to figure out what had caused the issue. It is obviously something gone horribly, horribly wrong with vertical deflection or something of the like. I will have a look at the schematic and see what I can learn about the operation of the scope. I am glad I do have the user manual and schematics, so it should be straightforward, it is a nearly 100% BJT design. The scope was used and old, and lacked a lot of features, such as cursors and frequincy counters. Perhaps it is time for a digital upgrade anyway... http://www.amazon.com/gp/product/B00N222I6C/ref=s9_simh_gw_p504_d15_i1?pf_rd_m=ATVPDKIKX0DER&pf;_rd_s=desktop-1&pf;_rd_r=1VEC8M45MB2T9REXCR7N&pf;_rd_t=36701&pf;_rd_p=2079475242&pf;_rd_i=desktop

Question by -max- 3 years ago  |  last reply 3 years ago


Super 9 Airsoft Sniper Rifle Scope Help Please Answered

I recently purchased a Super 9 Airsoft Sniper Rifle off of airsplat.com This rifle doesnt come with a scope on it, and I was wondering if anyone could give a quick guide/description on how to do it. Thanks!

Question by fearmonger12 9 years ago  |  last reply 9 years ago


Broken Scope Update: Transistor testing? Replace blown ones with commonly available equivalents? or BER?

So in a previous question, https://www.instructables.com/answers/My-oscilloscope-died-How/ I have stated that my oscilloscope died, and listed the symptoms. Since then, I have popped the cover off, had a look inside, and was I found inside what certainly appears like a "mod," it goes off to the 3 by 3 connector I have mentioned also. I forgot to mention a small blueish purplish wire was next to it, similarly just sticking out the scope. I figure it is a MOD because it is: A) precariously mounted to the transformer with only one small nut on the transformer B) Has so many bodge wires crawling around on it, that it looks more like a cobweb (and w/o silastic or hot glue for vibrations/stress) C) Sloppy soldering and flux residue left behind indicating hand soldering D) The PCB has a very different appearance than the rest of the boards inside; No solder mask, greyish white, and no silkscreened values, parts, or numbers. I traced both the wire and the connector and ribbon cable to the same mod board, which clearly got toasted. There was a small orange wire tangling off that board, it it broke off before I even realised it. Luckily the pictures show roughly where it was connected. Tracing the blue wire back to the board, I discovered it is connected directly to one of the cooked resistors, and I think the other cooked one was in series with it. The only connection found to the main board is the orange wire, and there are ceramic capacitors in series on that crappy looking PCB, indicating it is capacitively coupled. I was Hoping that what had happened was the blue wire came into contact something it was not supposed to, and shorted the output of that chip causing it to catastrophically fail, knocking out power to some of the boards. Unfortunately did not appear to the the case, and the supply voltages seem OK. Nothing appears obviously burned out on any of the other boards from what I can tell. However, just today I have discovered that some driver transistors, which are mounted to heat sinks, are getting unconfortably hot to touch. I suspect they may be blown, by the blackening and discoloration around them on the PCB.They themselfs do not appear to have any physical damage. I will desolder them and connect them to a transistor tester I have to see if they register as operational. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ As for some additional questions, can I replace those weird looking obscure transistors with standard ones? I am not sure of their exact specs, the only datasheets I can find for "2SA818" and "2SC1628" are some scanned PDF datasheets that are not in english, and I certainly could not find replacements online for them. I have the gut feeling radioshack is not going to carry them either. :P I hope this is not Beyond Economical Repair (BER), but used analog scopes can be bought used for around $30-$70, and of course I am on the verge of getting something better than that.

Question by -max- 3 years ago  |  last reply 3 years ago



Has anybody come across "PocketScope"?

I've been browsing this website, and I quite fancy one of their pocket microscopes.However, I have had no response from email or letter.Has anybody encountered the company or microscope through a different route?http://www.pocketscope.com/

Topic by Kiteman 10 years ago  |  last reply 8 years ago


Ace Of Spades sniper rifle scope? Answered

Hi guys, i have been playing ace of spades a computer download game. i wasmodding my sniper rifle when i came across this pic. i was wondering if anyone could make this scope in gimp and please make sure the background is transparent for shooting. thanks. heres the pic.

Question by shadow wave rider 6 years ago  |  last reply 6 years ago


Battery options for a reverse para-scope.

Hey everyone!so I'm building a para-scope for the dock at our cottage, except it will be used to peer down into the water and watch the fish. Just need a battery solution other then a 12V sealed lead acid battery that I already have. (hopefully light weight)1X waterproof camera tested @12 V (maybe 9v? test soon but does not work at 5v)1x lcd screen tested @ 5-12Vplus some pvc piping and other bits and bobs.....I have some spare lipos that I can connect in series but a bms would require 12.6v (Less voltage drop?) Ideas?BMS link ==> https://leeselectronic.com/en/product/16178.html?...9V battery will not last long enoughAny other ideas that will not cost an arm and a leg?

Question by Wired_Mist 1 year ago  |  last reply 1 year ago


How do you put a reticule in a spotting scope?

I would like info on how to put a reticule (cross hair) in a spotting scope or night vision scope.  Anything on how to do it & the optics about it.

Question by Coolerman 7 years ago  |  last reply 7 years ago


how do i zero in an airsoft sniper scope/? Answered

Just got a new airsoft sniper, and need help figuering out how to zero scope

Question by brickman93 8 years ago  |  last reply 8 years ago


Can a PDF be submitted?

I have a design/build plans for a $90 4.5" f/8 ball scope that I call the PortaBowl.http://home.comcast.net/%7Ejayscheuerle/PortaBowl.pdfI've been trying to get it into as many hands as possible and as it was created in a design program, it's not that easy to strip down to a set of text and picture files.Please let me know! - Jay Scheuerle

Question by jayscheuerle 10 years ago  |  last reply 10 years ago


where I can find the scopes and limitaions of a mousebot?

Where I can find the scopes and limitaions of a mousebot?

Question by ellamartin 6 years ago  |  last reply 6 years ago


home made airsoft improvements

Hey.... i tryin to think of ways to improve my guns... I have 2 spring rifles (a good sniper and a crappy assaultish style) and 1 pistol (also spring)... it would be much appreciated if someone could make an instructable that would allow you to make a bipod that does not use tape to attach to gun (folding = happy), as well as a pistol that isnt a pen gone blowgun. add any other improvements also, such as your own scope rings that attach to weaver rails.

Topic by airsofter2 10 years ago  |  last reply 10 years ago


Arduino Uno TV B Gone code error ?

I just got an arduino (the arduino is a fake off ebay, didnt know at the time.) It runs off of a ATMEGA8A-PU. I have built a few projects that work but now following this tutorial: http://www.righto.com/2010/11/improved-arduino-tv-b-gone.html Not sure if im just missing something or what I've done wrong but the compiler keeps giving me the error of: TVB.ino: In function 'void xmitCodeElement(uint16_t, uint16_t, uint8_t)': TVB:92: error: 'TCCR2A' was not declared in this scope TVB:92: error: 'COM2A0' was not declared in this scope TVB:92: error: 'COM2B1' was not declared in this scope TVB:93: error: 'TCCR2B' was not declared in this scope TVB:93: error: 'WGM22' was not declared in this scope TVB:106: error: 'TCCR2A' was not declared in this scope TVB:107: error: 'TCCR2B' was not declared in this scope TVB.ino: In function 'void setup()': TVB:191: error: 'TCCR2A' was not declared in this scope TVB:192: error: 'TCCR2B' was not declared in this scope TVB.ino: In function 'void sendAllCodes()': TVB:274: error: 'OCR2A' was not declared in this scope TVB:275: error: 'OCR2B' was not declared in this scope

Question by Aaamazzara 5 years ago  |  last reply 4 years ago


How do i attach a scope to a gun?

The scope is the back thing besides the pump and it needs to go on to of the PVC somewhat lifted, whats the best way to do it. Some minor adjustablity would be nice so I could calibrate it time to time.

Topic by sleepwalker0 12 years ago  |  last reply 12 years ago


Can a real scope fit on a Nerf gun?

.

Question by zack attack 9 years ago  |  last reply 8 years ago


Throat Problems - Scope Results - cause? - Diagnosis

       Some of you have probably seen my other 2 OLD forum topics, but if you haven't, I will explain it to you here. I have been having BAD throat problems for a few months now. Since I was about 9 I had food getting stuck in my throat. So one day, I was eating lunch, and food got stuck, slid down my throat and into my wind pipe. I started choking and couldn't breath. After that dramatic incident, I noticed a new symptom. I physically could not swallow. And on top of that I had an old symptom: heartburn. So I go to a doctor. He says I would have to get a scope.        So THIS is where the update begins. It was early September. I go in to get a scope. I wake up with the memory spam of a goldfish. So my family and I wait a while to go to the doctor for the results. So I go to my appointment where my doctor explains what is going on.                   ALL THE WAY DOWN my throat I have ulcers. Thus, around my ulcers they swell up, causing the difficulty swallowing         There are these things that MOST (not all) people have called esophills. I cannot find any info on these things so I will explain them to you instead of a link. These "esophills" are basically cells in your throat that react to allergies. They could swell up, itch, burn, etc. Well, mine swell up. The average person has about 5. I have 21.                      After explaining these things, my doctor says I have Eosinophilic Esophogitis (http://en.wikipedia.org/wiki/Eosinophilic_esophagitis) and says I have to get an allergy test.          Pardon my french in this paragraph....I go to see an allergist. He says to wait in the room for a few minutes until this hot girl comes in. She takes these blue pointy things and pricks me with them as liquid comes out. So she walks away, and we wait. 2 of the pricks start itching like hell. The doctor comes in, and says those two pricks are samples of corn and apples. Apples? No biggy. Corn? Damn...........why is that bad? Things that have corn that I was banned from: Soda, chips, pretzels, cereal, cereal bars, bread, and hell of a lot of other things.         So I don't eat ANYTHING with corn for about a week until the blood test results come in. About a week after the allergist appointment, he calls and says corn and apples came out negative. So I could go back to eating things with corn.        Tomorrow (10/4) I have to go get ANOTHER allergy test by taping food to my back. Hungary? Just rip the food off my back. Thanks for reading! C'ya will I go cry in a corner /sarcasm  

Topic by Flumpkins 9 years ago  |  last reply 9 years ago


how can I make an oscilloscope with arduino as a processor that uses a tv as an output?

I coould use my computer as an output, but a TV would be better

Question by wii552 9 years ago  |  last reply 7 years ago


Red dot scopes: I cant quite chose Answered

I am looking to buy a red dot scope, nothing too pricey, but nothing too crappy either. I am buying it off of amazon along with my vest, and i am stuck between 2. the first one is a barska on the following link:   http://www.amazon.com/Barska-Short-Tube-Gun-Sight/dp/B002QEXJH4/ref=sr_1_236?s=sporting-goods&ie;=UTF8&qid;=1286397649&sr;=1-236 the other one is also a barska, and is on this link:   http://www.amazon.com/BARSKA-Red-Dot-42mm-Riflescope/dp/B001JJCHY8/ref=pd_ybh_10?pf_rd_p=280800601&pf;_rd_s=center-2&pf;_rd_t=1501&pf;_rd_i=ybh&pf;_rd_m=ATVPDKIKX0DER&pf;_rd_r=0EQE4AP7X4QRM4CRR1SF If you could look at both and help me chose, or suggest another red dot scope between $30 - 40.  If you own either of them, please tell me what you think of it. If possible, i would like to know if either of them need a riser mount to clear the m4 front sights

Question by predatory meatball 8 years ago  |  last reply 8 years ago


Can using logarithms overcome scope insensitivity bias? Answered

Say you perform the following type of psychology experiment:You describe an undesirable event to people,tell them that X instances of the event can be prevented, andask them what they would be willing to pay in order to prevent those X instances.The responses you get (Y) are not even close to being linear with respect to X, but ratherthe responses are roughly logarithmic. That is, X=ABY, or Y=logB(X/A) for some constants A and B.So does anyone know of an experiment (or real-life situation) where subjects are asked to answer in terms of log(Y) instead of Y? Do such responses show a linear relationship to the corresponding X?

Question by NobodyInParticular 10 years ago  |  last reply 10 years ago


Why isn't my ATTiny85 accepting this SoftwareSerial???!? Answered

My code is from the IR Cloud light instructable. I am trying to place a smaller, more abbreviated code into an ATTiny85. The tutorial written by MIT says we can put SoftWareSerial on it (reference: http://hlt.media.mit.edu/?p=1695). But anyway, Code: #include int RECV_PIN = 0; int green = 4; int yellow = 2; int blue = 3; int white = 1; #define powercode 16712445 #define stormcode 16745085                 IRrecv irrecv(RECV_PIN); decode_results results; void setup() {   pinMode(green, OUTPUT);     pinMode(yellow, OUTPUT);         pinMode(blue, OUTPUT);             pinMode(white, OUTPUT);   irrecv.enableIRIn(); // Start the receiver } int whitebool = 0; int rainbool = 0; int yellowbool = 0; int bluebool = 0; int greenbool = 0; unsigned long last = millis(); void loop() {   if (irrecv.decode(&results;)) {                      //Sun if (results.value == 16712445) {       if (millis() - last > 250) {         whitebool = !whitebool;         digitalWrite(white, whitebool ? HIGH : LOW);       }       last = millis();     }     //red       if (results.value == 16745085) {       if (millis() - last > 250) {         greenbool = !greenbool;         digitalWrite(green, greenbool ? HIGH : LOW);       }       last = millis();     } //yellow     if (results.value == 16726725) { // Sun up       // If it's been at least 1/4 second since the last       // IR received, toggle the relay       if (millis() - last > 250) {         yellowbool = !yellowbool;         digitalWrite(yellow, yellowbool ? HIGH : LOW);       }       last = millis();     } //blue         if (results.value == 16759365) { // Sun up       // If it's been at least 1/4 second since the last       // IR received, toggle the relay       if (millis() - last > 250) {         bluebool = !bluebool;         digitalWrite(blue, bluebool ? HIGH : LOW);       }       last = millis();     }     irrecv.resume(); // Receive the next value   }     } And error : /Users/pdyates/Documents/Arduino/libraries/IRremote/IRremote.cpp: In member function 'void IRsend::mark(int)': /Users/pdyates/Documents/Arduino/libraries/IRremote/IRremote.cpp:227: error: 'TCCR2A' was not declared in this scope /Users/pdyates/Documents/Arduino/libraries/IRremote/IRremote.cpp:227: error: 'COM2B1' was not declared in this scope /Users/pdyates/Documents/Arduino/libraries/IRremote/IRremote.cpp: In member function 'void IRsend::space(int)': /Users/pdyates/Documents/Arduino/libraries/IRremote/IRremote.cpp:235: error: 'TCCR2A' was not declared in this scope /Users/pdyates/Documents/Arduino/libraries/IRremote/IRremote.cpp:235: error: 'COM2B1' was not declared in this scope /Users/pdyates/Documents/Arduino/libraries/IRremote/IRremote.cpp: In member function 'void IRsend::enableIROut(int)': /Users/pdyates/Documents/Arduino/libraries/IRremote/IRremote.cpp:253: error: 'TIMSK2' was not declared in this scope /Users/pdyates/Documents/Arduino/libraries/IRremote/IRremote.cpp:263: error: 'TCCR2A' was not declared in this scope /Users/pdyates/Documents/Arduino/libraries/IRremote/IRremote.cpp:263: error: 'WGM20' was not declared in this scope /Users/pdyates/Documents/Arduino/libraries/IRremote/IRremote.cpp:263: error: 'TCCR2B' was not declared in this scope /Users/pdyates/Documents/Arduino/libraries/IRremote/IRremote.cpp:263: error: 'WGM22' was not declared in this scope /Users/pdyates/Documents/Arduino/libraries/IRremote/IRremote.cpp:263: error: 'CS20' was not declared in this scope /Users/pdyates/Documents/Arduino/libraries/IRremote/IRremote.cpp:263: error: 'OCR2A' was not declared in this scope /Users/pdyates/Documents/Arduino/libraries/IRremote/IRremote.cpp:263: error: 'OCR2B' was not declared in this scope /Users/pdyates/Documents/Arduino/libraries/IRremote/IRremote.cpp: In member function 'void IRrecv::enableIRIn()': /Users/pdyates/Documents/Arduino/libraries/IRremote/IRremote.cpp:279: error: 'TCCR2A' was not declared in this scope /Users/pdyates/Documents/Arduino/libraries/IRremote/IRremote.cpp:279: error: 'WGM21' was not declared in this scope /Users/pdyates/Documents/Arduino/libraries/IRremote/IRremote.cpp:279: error: 'TCCR2B' was not declared in this scope /Users/pdyates/Documents/Arduino/libraries/IRremote/IRremote.cpp:279: error: 'CS21' was not declared in this scope /Users/pdyates/Documents/Arduino/libraries/IRremote/IRremote.cpp:279: error: 'OCR2A' was not declared in this scope /Users/pdyates/Documents/Arduino/libraries/IRremote/IRremote.cpp:279: error: 'TCNT2' was not declared in this scope /Users/pdyates/Documents/Arduino/libraries/IRremote/IRremote.cpp:282: error: 'TIMSK2' was not declared in this scope /Users/pdyates/Documents/Arduino/libraries/IRremote/IRremote.cpp:282: error: 'OCIE2A' was not declared in this scope What's the big idea??? If this is way too deep, I'll just use an Arduino Uno for this project... I just really want this to be tiny. :(

Question by pyates1 5 years ago  |  last reply 5 years ago


Perfect war gun V2

Hey! i'm back with the V2! Okay, this gun fixes all the problems of V1 like: It know has a mag for the pump action part (that shoots 2 blue rods at a time!) the turret doesn't fall off any more looks cleaner it's got a scope and better sights uses quite a few less pieces (not that different more comfy trigger for all three guns are a lot more reliable So, i might be posting, depending on what you guys think, and i need a name for it! Happy seleziona day!

Topic by Seleziona 9 years ago  |  last reply 9 years ago


Is it worth dropping $400 on a shiny new Rigol DS1054Z scope?

I will describe my situation: I am a hobbiest that likes to make cool projects, and plan to get into maybe RF analog stuff, (maybe start out with making a few FM bugs, reverse engineer a simple video transmitter kit, and a few other things.) as well get into arduino some more, AC analysis (learn about Xformers, power factor, maybe some math, etc.) and I so currently have an old 2ch. 30MHz analog oscilloscope that is a PITA to make real measurements with. Not only is it huge and takes up a lots of space, but also I'm not even sure it is in cal!) I will be transferring into UVA (or maybe VT) for EE, and gone this summer for a NASA internship at langley. (maybe I will be able to take it with me w/ a toolbox of some electronics stuff!)   The scope I am looking at (what appears to be what many subscribers seem to use, and/or claim is pretty good) is the Rigol DS1054Z. I only know how to use my $30 30MHz BKprecision scope I got on craigslist from the son of a father who was a TV repairman, and have NO experience with the use of the fancy-shmancy digital scope! What little I know is from watching EEVblog review of other scopes in the past. (I do know that they can be useful for 'capturing' waveforms, and can be set up to trigger on a pulse, maybe a certain digital codes, and that could come in handy for reverse engineering crap.)   https://www.youtube.com/watch?v=7v-tFYbc7h8   https://www.youtube.com/watch?v=W2qdtQkBKhc   https://www.youtube.com/watch?v=ETCOhzU1O5A   https://www.youtube.com/watch?v=-gStNYfqMXk     What sells it to me, being a complete newbie to electronics and digital scopes is that it has a nice big screen, the specs seem good (other certainly think, I have no intuition of what any of those things mean except the bandwidth, and maybe the sampling rate, 1GSa/s), 4 channels, intensity graded display, and it has loads of functions and stuff for me to grow into, and hacking it to make it think it is a DS1104Z is tempting, but I probably will not do that right away. Maybe once I feel what it offered is limiting.   The deal breakers is the $400 price, a bit steep for me (cheap for something this good, apparently but still.), the fear that by the time I really start using it, it will be obsolete and the same money can buy some quantum super duper ASIC tech whiz bang 3GHz 100Gsa/s 1GB segmented memory spectacular scope!   I am not really sure if it has a source, or signal generator either. Some sources claim that higher end ones do, or certain models anyway, and it seems like the official site say's no. http://www.rigolna.com/products/digital-oscilloscopes/ds1000Z/ds1054z/ That brings me to my next point. Should I also get a decent function generator?   

Question by -max- 4 years ago  |  last reply 3 years ago


why i get the following error 'QTR_NO_EMITTER_PIN' was not declared in this scope?

Here is my code: #include #define NUM_SENSORS   1     // number of sensors used #define TIMEOUT       2500  // waits for 2500 us for sensor outputs to go low #define DETECT_LEVEL  150   // Sensor needs to change this amount for detection #define TRIGGER_COUNT 10    // Wait n successive readings valid detection // Create instance of sensors. We are only using one sensor connected to pin 12 PololuQTRSensorsRC qtrrc((unsigned char[]){12}, NUM_SENSORS,TIMEOUT,QTR_NO_EMITTER_PIN); unsigned int sensorValues[NUM_SENSORS]; unsigned int sensorValuesBase[NUM_SENSORS]; unsigned int detect_count[NUM_SENSORS];    // Number of successive times sensor                                            // has detected a drop in value. If                                            // this is greater than trigger_count                                            // then white line detected // Setup pins for SN754410 Motor chip int lf = 6;      // Left motor Forward int lr = 5;      // Left motor Reverse int rf = 11;     // Right motor Forward int rr = 10;     // Right motor Reverse int led = 3;    // LED and resistor across pins 2 and 3 int led_gnd = 2; unsigned char line_detect=1; unsigned char do_turn=0; void setup()  {   pinMode(led, OUTPUT);   pinMode(led_gnd, OUTPUT);     digitalWrite(led_gnd, LOW);    // LED ground     pinMode(13, OUTPUT);   digitalWrite(13, HIGH);        // turn on Sensor   //Read and store the baseline values   qtrrc.read(sensorValues);    sensorValuesBase[0] = sensorValues[0];    } void loop()  {     if(line_detect==1){       // Line Detect is enabled     qtrrc.read(sensorValues);     if(sensorValues[0] < (sensorValuesBase[0]- DETECT_LEVEL)) {       // Detected drop on value - brighter object detected       detect_count[0]++;   // incerment count       if(detect_count[0] >= TRIGGER_COUNT) {         // White Line detected         detect_count[0]=0;          // Reset count         do_turn=1;                  // Start the turn         digitalWrite(led, HIGH);    // turn on LED              line_detect=0;              // Turn off detection until turn complete               // Come to s stop         analogWrite(lf, 0);                 analogWrite(rf, 0);         analogWrite(lr, 0);                 analogWrite(rr, 0);              delay(200);            }      }     else {       detect_count[0]=0;     }    }   if(do_turn==1){     //Turn right a bit to avoid obstacle     analogWrite(lr, 0);         analogWrite(rf, 0);     analogWrite(lf, 200);     analogWrite(rr, 200);           delay(500);                // Turn for half a second     line_detect=1;             // turn line_detect back on     do_turn=0;                 // turn off     digitalWrite(led, LOW);    // turn off Led   }   else {     // go forward until we detect something     // Forward     analogWrite(lr, 0);             analogWrite(rr, 0);     analogWrite(lf, 250);             analogWrite(rf, 250);       } } i add the library and it appear in sketch import library?

Question by hayhackerall 5 years ago  |  last reply 5 years ago


Whenever I use arduino IDE this weird error message appears in the box.? Answered

sketch_mar24a.cpp: In function 'void setup()': sketch_mar24a:7: error: 'pinmode' was not declared in this scope sketch_mar24a.cpp: In function 'void loop()': sketch_mar24a:15: error: 'digitalwrite' was not declared in this scope What does this mean and how do I fix it.

Question by transuranic 8 years ago  |  last reply 1 year ago


Oscilloscope Features

I would like to buy an Oscilloscope but don't knowing what features are essential to have and what are not.  There is so many different way to buy one, 60Hz  100Hz  200Hz   400Hz. I see digital and analog scopes. 2 trace   4 trace among many other options. What would be the key things i would want to try and look for in a scope? 

Topic by WWC 6 years ago  |  last reply 6 years ago


​Make an optic close focus.

I want to be able to put my night vision monocular in front of my 2x scope on my airsoft.I need a combination of lenses to put between my scope and the NV to let the scope focus at a couple of inches (instead of 30 feet), and reduce magnification because otherwise I’d just be looking at a tiny part of the phosphor screen heavily magnified.I know it’s possible because a commercial unit is available, I just don’t know if it’s feasible for a guy like me (doesn't have a degree in optics) to build (I'm thinking no, but I figured I'd ask).Thanks for any help you can offer.

Topic by instrucables360 10 months ago  |  last reply 10 months ago


I have an Airsoft m3000 shotgun but i need a sight so I'm wondering if a Tasco 4x20 scope will fit on the guns rail? Answered

I have an Airsoft smith and Wesson m3000 shotgun (355 fps) and need a sight for wars but will the scope fit on the shotguns rail? there is a pic of the gun if you click on the other picture at the bottom

Question by Airsoft 007 Sniper 8 years ago  |  last reply 7 years ago


Which nerf gun?

I dont know with nerf gun to get the longshot, vulcan looks cool two But i dont Know what to get help i am looking for a good field gun, and does any one know were i kan buy a scope for it

Question by hobbitboy 8 years ago


Problems with Handbag libraries

Hi, I've trouble with the Handbag and Android Acessory library. I've  already unzipped the folders  and put it into the libraries folder. Then I ran the SimpleHandbag sketch. But now I have some errors: SimpleHandbag.ino:54:21: error: Handbag.h: No such file or directory SimpleHandbag:57: error: 'AndroidAccessory' does not name a type SimpleHandbag:63: error: 'HandbagApp' does not name a type SimpleHandbag.ino: In function 'void setupUI()': SimpleHandbag:86: error: 'Handbag' was not declared in this scope SimpleHandbag.ino: In function 'void setup()': SimpleHandbag:95: error: 'Handbag' was not declared in this scope SimpleHandbag.ino: In function 'void loop()': SimpleHandbag:100: error: 'Handbag' was not declared in this scope Thanks for help. Sorry my 'English is not the best, because I'm just a German, who learns English at school

Topic by TobiCplusplus 4 years ago


Is the Rigol DS1052e any good? Answered

Does anyone have any experience with this oscilloscope? Would you recommend it as an entry level scope?

Question by Ethanal 8 years ago  |  last reply 5 years ago


Telescope repair advice wanted: UPDATED!

This question is more like 2 questions- 1) Am I crazy? 2) Is this feasible? Background: I recently inherited an astronomical reflecting telescope, which I think has been dropped at some point.  The design is as below. Where the eyepiece enters the side of the tube that makes up the body of the scope, the tube is slightly dented.  The eyepiece still points at the secondary mirror and the alignment is good enough that I can point the scope at an object and get an image, but the alignment isn't perfect so the image has a lot of what I'd guess is spherical aberration preventing a decent image. Firstly- is having the eyepiece on-axis and perfectly aligned so important that I will never ever get even a half-decent image from this scope?  If the tolerance involved are 0.1mm and minutes or seconds of angle, I doubt I can restore it that well. Secondly, is having the eyepiece positioned on-axis as important as having it parallel with the ideal axial light path?  As it's held in with three screws I'd imagine I can tweak the alignment with some use of spacers etc. but if it's off-axis I don't think I can shift it back to the perfect position.  In other words, for the mathematicians, is having the eyepiece "translated" as much of a problem as having it "rotated"? (Thirdly- if the reflecting scope is trash, can I get a 150mm diameter 1000mm focus lens and make a straight-through scope with the bits?) UPDATE: it's working perfectly, see pictures below!

Topic by PKM 8 years ago  |  last reply 8 years ago


My new assault rifle

Well, Hello. This is my new assault rifle. I made this in about 3 hours. It turned out much much better than I expected. It shoots about 40ft but it has a very good strong trigger so maybe 50ft. The trigger block in the barrel works like the way Pooplord's Lever action pistol does. It requires no cut pieces although, my one has some on it. The mag is removable but its a little bit hard to do so.  I might post it, might not. Sorry for the bad(ish) picture but I was using my phone. Adiós Amigos.

Topic by Millawi Legend 8 years ago  |  last reply 8 years ago


My Knex Attachments

Any attachment you want, ask, ill try and make it. 1) Holographic sight 2) Sniper scope 3) M203 Grenade Launcher

Topic by EXZOTlC 8 years ago  |  last reply 6 years ago


Original knex gun.

Ive been wonder, what is the first knex gun posted on instructables? I want to see the progress thats been made

Question by rosenstyle 10 years ago  |  last reply 8 years ago


Tektronix 475 Oscilloscope for sale

I have a Tektronix 475 oscilloscope for sale.  I had used it to create my Desulphator in an Altoids Tin instructable several years ago (see pictures).  The scope is a 200 MHZ bandwidth (very fast) analog 2-channel design and was a top of the line device at the time of its manufacture. This scope is in very good operating condition, has had an easy life, has very few blemishes and no scratches.  Please see my eBay auction for further details.  http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item;=221319636161

Topic by kmpres 5 years ago


New Knex Gun

Hey ive built a new knex gun and i wanted some feedback as to whether i should post an instructable on it. All comments will be appreciated. Thanks.

Topic by Dunshea 11 years ago  |  last reply 9 years ago


Is the Elite Force 1911 airsoft gun Hi Capa/Tokyo Marui Compatible?

I want to upgrade my Elite Force 1911 into a modern race gun, and I wanted to know if TM upgrade parts such as rail mounts and grips can fit on it. Thanks!

Question by zack attack 6 years ago  |  last reply 6 years ago


tips on buying a microscope, looking for aa good used deal. ecoli, parasitesl, arva eggs,

I want to buy a compound microscope, i want to be able to check for ecoli and parasite eggs. i figure 2000 power may work, correct me if not. would really like to be able to monitor or take pics via pc, but may be out of  price range.  looking at $300 us tops ,unless a super good used deal for around $500 comes by. i never took biology ,well since high school, so am out of ouch of what i want. ebay has new ones of a chinese brand, have to look up the name, but prefer used for better deal unless people know that the new ebay scopes A??? are a good deal. are scopes up-gradable , meaning, could i get a scope and add the camera attachment later? thanks, pure noob here, i know i dony want clips, and i know certain lights = cheaper from my research.

Topic by escapefromyonkers 7 years ago  |  last reply 7 years ago


paintball mask upgrade

Does any 1 have any paintball mask mods better than mine ? mine has a sight on it that works for my gun too homade scope also i will try to post it soon

Topic by knexlord 11 years ago  |  last reply 11 years ago