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21 game

In the late '50's Popular Electronics magazine (out of print) published an article "building a rudimentary computer" It was called the Challenger. It was a circuit that could play the old parlor game of "21", and utilized a mechanical stepping relay to do the "computing". There was a series of 21 pilot lamps, with a 'player' and 'machine' pushbuttons. The player, and the machine, in turn, could light 1, 2, or 3 lamps, with the object being to avoid lighting the last, or 21st lamp. The machine would invariably win. The secret is that within the number 21 there are five groups of 4, with one left over. Whatever number the player selects, (1, 2, or 3) the machine then selects a number that, when added to the players choice, totals 4. (player 1, mach. 3 / player 2, mach 2/ player 3, mach. 1) It would seem that today's processors and LED's, could handle this task easily. Would you, or someone you know, be interested in designing such a circuit as a project? I built it back then but I'm afraid my knowledge is stuck back in that time and would need instructions remenicient of that era.

Topic by 2Mikado2    |  last reply


12-21-2012.............? Answered

From predictions to prophecy to hype, everybody has an answer.  What is yours?

Question by onrust    |  last reply


Knex TAR 21

Hey, nothing new here besides the TAR that everybody has seen before. As you remember it looks very good and smooth. It is a truly bull pup design that makes it very realistic. It shot white rods in its 15 round magazine. More info: 1. Working Bull pup design. 2. Folding front sight. 3. Shoots 40 feet. 4. Ammunition is an orange con. 5. True trigger. 6. Ram rod powered. 7. Very comfortable cheek rest & design. 8. Solid seventh layer coating. 9. Removable magazine. 10. Holds up to 15 rounds. 11. Measures 30 INCHES! (Real TAR- 21 is 29). 12. Looks very well. 13. Ram rod is a red rod.

Topic by Blue Mullet  


21 Years Old Today

Would you believe it fellow K'nexers I have finally really reached that age of 21. I've been a member of this website for many years and it has become a new chapter in my life and it has grown on me very much since I have been using what time I have to bring you my reviews and instructions. Ever since I joined instructables, you may have thought why I do all this and the reason is because it is something that I do as a hobby and although it take some time to create new instructables, it is always worth the time and effort whether it it's a review or instructions. Now I can be 100% honest and say that I ain't the most popular Instructabler for K'nex but for those that do build my creations and support me, thank you I really do appreciate it. I will be continuing on with my instructables even at my age but then again you are never to old to do anything.     

Topic by Zombiekiller-93    |  last reply


Achiev'ibles - 21/12/2012

Here is a list of the patches that were earned by members of the Achiev'ibles group from 08/12/2012 to 21/12/2012. List of members: www.redtorope.com/achievibles/members.php List of achievements: www.redtorope.com/achievibles/patches.php Total+Views: AwesomeSwordGuy mofoya acidbass Tornado96 mpilchfamily Nelson_Yepez Instructables: cbm104 Mrballeng Subscribers: daredevil499 zack247 mJusticz Tomdf Hack42Moem BrittLiv Answers: Siddharth+Jain jessyratfink Comments: vicvelcro daredevil499 Following: vicvelcro Tomdf

Topic by Jayefuu    |  last reply


Achiev'ibles - 21/11/2012

I've been pretty busy recently, hence no updates. The script's still been ticking along automatically recording stats, until this week when it broke due to a bug in Instructables. Canucksgirl's helped me work around that and now it's fixed I thought I'd post an update. For those that don't know, Achiev'ibles is an automatic patch giving effort. Sign up by commenting below and then every day your stats will be automatically collected. When you reach key milestones in total views, Instructables, comments, followers, following and more, you'll be rewarded with a patch to show your achievement. Some fun facts: - We now have 282 members - This is my 100th forum topic! Yay! - I improved the code to generate the below table of patches, it's now dead easy to get. If someone reminds/nags me every two weeks, I promise to post an update. Or I can let them know how to generate the table themselves and they can post the forum topic. Here are the patches that have been automatically awarded in the last two week period, 07/11/2012 - 21/11/2012. bricabracwizard Tomdf zack247 Rob+O DoctorDv patriots8888 qazwsx755 drknotter Re-design thermoelectric dark+sponge Samuel+Bernier bajablue Subscribers: iproberry1 kelseymh frenzy Comments: coolbeansbaby68 bricabracwizard poofrabbit rimar2000 Following: poofrabbit poofrabbit

Topic by Jayefuu    |  last reply


i need help with psp hack.(psp 3000 version 4.21? Answered

Hey i have a psp 3000 version 4.21 and i need help to hack it to play free games. send me links to upgrade the version or link to hack it. thanks! and steps to hack it thanks!

Question by HmOnGbOi    |  last reply


21 uses for a wire Hanger Problem

When you download the pdf of 21 uses for a wire hanger the top download actually downloads 11 uses .. with 11 different uses included. When you choose the custom pdf download it is called 21 uses but I only saw 14 actually in the download ... if you download the actual page it is 21 uses .... Just an inconsistency...

Topic by ChefJohn1955    |  last reply


Tony Danza is personality no 21 on the Web

Hey! Tony Danza is 176th in the world and #1 Actor. I don't know how they do it this but Marlon Brando and Rutger Hauer are just after him. His popularity has been growing but since last month he has lost 18%!:( Have a look at the stats here http://www.thepoplist.com/card.data/Tony%20Danza_12620214.htm

Topic by kim123    |  last reply


Comment of the Week! 10/21/2014

I recently discovered this motorcycle saddlebag tutorial by brand new author, tony.fantasia and left a comment about how beautiful it was and my admiration for his skill.  Imagine my delight when he responded with a super thoughtful and nice comment!  I just wanted to give him a shoutout on the forums and bring some attention to a new member of the community who is not only a talented and skilled leatherworker, but a super nice person!  I'm looking forward to seeing more from him in the future! Want to own one of his beautiful designs?  You can check out his shop here and check out his facebook page here.

Topic by Danger is my middle name    |  last reply


do you have to be over 21 to enter

Im 13 can i enter

Topic by GianniMora    |  last reply


21 Halloween guides because you procrastinated!

Great Halloween Costumes Last Minute Ideas DIY Makeup Lady GaGa Costumes Amazing Pumpkin Carving Iron Man Guide Star Wars Costumes Baby Costumes Halloween Treats Dog Costumes Cheap and Amazing Costumes Make a Mask Gamer Costumes Halloween Decorations Mario Costumes Become Batman Halloween Crafts Haunted House Props Witchy Wonders Ten Costumes You'll Never Make Ten Costumes You Can't Believe Someone Made Instructables.com - 82 2nd St. - San Francisco, CA

Topic by randofo  


Best Answers Count For 2011-05-21

11010010110 34 acidbass 35 alex-sharetskiy 44 AndyGadget 128 AngryRedhead 40 artificialintelligence 4 beckervdejazz.com 16 blkhawk 13 Burf 200 (patch sent) caitlinsdad 26 CameronSS 20 canida 12 caarntedd 38 ChrysN 39 cyberpageman 22 diyoutdoorsman 7 DJ+Radio 65 dombeef 1 Dr.+Pepper 22 ewilhelm 11 Flannel+UK 12 frollard 394 fwjs28 16 gmjhowe 6 gmoon 42 Goodhart 13 Gorfram 52 Grathio 53 Hiyadudez 15 iceng 20 iPodGuy 17 Jack+A+Lopez 119 JamesRPatrick 9 Jayefuu 54 jeff-o 98 Joe+Martin 40 jtobako 64 karnuvap 22 kcls 12 kelseymh 287 kevinhannan 13 Killer~SafeCracker 40 killerjackalope 28 Kiteman 241 Koosie 9 Kryptonite 11 lemonie 522 Lithium+Rain 13 lizzyastro 5 LoneWolf 7 M4industries 11 MahavishnuMan 54 MegaMetal8 2 MichelMoermans 24 mikeasaurus 65 Mr.+Stealth 20 NachoMahma 177 nfk11 1 nickodemus 19 NobodyInParticular 59 Nutrition+Man 12 orksecurity 397 plane+phanatic 9 Prfesser 28 purduecer 11 randofo 22 RavingMadStudios 127 Re-design 626 RelaxedSoup 17 rickharris 130 seandogue 224 Shadowman39 22 siliconghost 28 Sorunome 4 Steveastrouk 509 The+Ideanator 23 TitanTechRobotics 4 uniqueutopia 19 username252 2 UziMonkey 34 Willard2.0 9 wrivera6 13 yokozuna 77 Zengineer1618 13 zero.gx 90 -- Best Answers Monitor v1.00.04 (2011-04-25) NachoMahma (Original Perl script by Jayefuu) (Regex help provided by kelseymh) Report Date/Time: 2011/05/21 0748

Topic by NachoMahma    |  last reply


Why are there 21 finalist in the Teach-Me-Fast Contest

There where supposed to be 20 finalist and now that they have removed the rest of the videos from the contest home page it is showing 21 finalist. Was there a tie in the voting?

Topic by Deathstick    |  last reply


How to re-charge Duracell 21/23 Batteries?

Can a dead(drained) Duracell 21/23 battery be re-charged with-out it exploding in your face?

Question by Tonester    |  last reply


replace a 21 " CRT in a TV with the small CRT PC monitor ?

 i have a 21" TV lying around and an old CRT monitor. basically i want to use the CRT monitor as the TV in my bed room. the old 21" TV is not  working but the CRT monitor is. is there any way I can use the monitor as a tv without the computer? since the monitor cannot be directly connected to the cable i need a way to use it... pls help. 

Question by para p    |  last reply


21 in poulan power mower will only start with starting ether.?

 1 year old 21 in poulan will only start with starting ether.,once it starts it will continue to run until i shut it down after I finish cutting.  While it is hot it will restart easily, I have replaced the spark plug.problem started this season it was  stored in a heated garage.

Question by jamest58    |  last reply


Total Views Count - 21/07/2012 soon to be Achiev'ibles

Here's this week's total views count. I'm getting closer to finishing the new version, which thanks to ChrysN will be now be called Achiev'ibles! To summarise, there will no longer be a weekly topic containing your total views gain. Instead you'll be awarded patches for achieving milestones for Total Views, Comments, Instructables, Instructables Featured, Following, Subscribers and Topics. Future updates should see you also getting patches for your Instructable being in a Newsletter and for being featured on a famous blog or website. Lastly, drop to the bottom to see the forum topic's image! Canucksgirl's been working on the patch designs for the new version of the group. They look great! Name 14/07/2012 21/07/2012 Gain scoochmaroo 9794144 9891679 97535 canida 6712566 6755921 43355 fungus+amungus 5742853 5773945 31092 randofo 5310740 5349829 39089 jessyratfink 3706945 3750503 43558 Honus 3482519 3494950 12431 Kiteman 2603923 2614945 11022 Plasmana 2538669 2549528 10859 ChrysN 2202852 2243251 40399 Tool+Using+Animal 2108167 2115854 7687 Creativeman 1720749 1735147 14398 chr 1620175 1633423 13248 mikeasaurus 1614188 1630874 16686 drinkmorecoffee 1612224 1621168 8944 killerjackalope 1484329 1490109 5780 T3h_Muffinator 1420803 1424263 3460 zieak 1407466 1411769 4303 frenzy 1360567 1370957 10390 Weissensteinburg 1308979 1315836 6857 lemonie 1293536 1298383 4847 gmjhowe 1291244 1294297 3053 Frivolous+Engineering 1121987 1126930 4943 mikey77 984363 991965 7602 shesparticular 966022 970387 4365 Brennn10 935057 938783 3726 jeff-o 886912 891299 4387 scraptopower 874137 881773 7636 ModMischief 841158 864593 23435 Mrballeng 811972 855342 43370 aeray 841302 847678 6376 CameronSS 827463 832639 5176 laxap 776524 779767 3243 PKM 773457 776415 2958 depotdevoid 734983 738284 3301 starshipminivan 729555 737014 7459 belsey 713488 717412 3924 Jayefuu 679036 681754 2718 Gadget+Gangster 584472 589175 4703 BrittLiv 524376 527337 2961 AngryRedhead 514622 517863 3241 rimar2000 471792 474640 2848 mary+candy 381937 385076 3139 vishalapr 381594 383643 2049 Spl1nt3rC3ll 374363 376116 1753 Vyger 341325 342835 1510 Greasetattoo 337040 340561 3521 KentsOkay 339095 340450 1355 rickharris 338666 340360 1694 Ninzerbean 323205 325226 2021 scooter76 320024 320531 507 Lithium+Rain 310175 313126 2951 sunshiine 304648 311749 7101 Computothought 293202 297613 4411 Xellers 292042 293756 1714 Technochicken 282198 283684 1486 AndyGadget 276335 278606 2271 knife141 275399 277704 2305 bajablue 265859 270809 4950 justjonty 254891 257149 2258 craftknowitall 224349 250274 25925 Hiyadudez 241552 243102 1550 iminthebathroom 239456 240604 1148 annahowardshaw 237717 240190 2473 bertus52x11 236885 238344 1459 dark+sponge 233746 234237 491 bongodrummer 232856 233649 793 janw 230444 231614 1170 JamesRPatrick 226205 227205 1000 jen7714 214219 216947 2728 comodore 215903 216557 654 thermoelectric 213206 215489 2283 Nelson_Yepez 211993 213541 1548 Lynne+Bruning 210463 211636 1173 Kaelessin 208729 209433 704 yokozuna 204102 204830 728 coolbeansbaby68 203284 204676 1392 RavingMadStudios 195544 196982 1438 Dr.Paj 195797 196513 716 Jimmy+Proton 169572 171938 2366 ynze 166974 167981 1007 WYE_Lance 160368 163430 3062 HHarry 146778 159963 13185 lw119 153569 155731 2162 I_am_Canadian 151569 152072 503 The+Jamalam 151137 151488 351 DJ+Radio 147866 148745 879 marc.cryan 144662 146798 2136 wizgirl 142381 143819 1438 susanrm 136406 139041 2635 Goodhart 138124 138622 498 Mr.Sanchez 130187 130916 729 The+Papier+Boy 129344 129989 645 Killer%7ESafeCracker 124749 126290 1541 fjordcarver 102273 116380 14107 MichelMoermans 114902 115589 687 Biggsy 112201 113297 1096 dombeef 104672 105166 494 cammers 102401 103206 805 blinkyblinky 100994 102618 1624 mman1506 99802 100502 700 KoffeeKommando 91686 92937 1251 monsterlego 82636 87895 5259 Shadowman39 87031 87480 449 beanieostrich 84463 85313 850 LargeMouthBass 83461 84473 1012 Re-design 83210 83702 492 agis68 82505 83020 515 The+Ideanator 76557 76960 403 ajleece 73560 73759 199 diyoutdoorsman 71112 71949 837 kelseymh 71252 71733 481 cdawisconsin 70534 71290 756 TabbyDeAnne 69590 70341 751 Winged+Fist 69106 70106 1000 TitanTechRobotics 68899 69360 461 arthurb 68085 68292 207 Sunkicked 65648 66004 356 coolpizzadude 65503 65933 430 EmmettO 65104 65394 290 Win+Guy 63486 63968 482 mkanoap 62744 63111 367 jwystup 60641 60927 286 Berkin 59294 59635 341 lizzyastro 58165 58814 649 nickodemus 55537 55910 373 iceng 54834 55477 643 knuckel 55120 55419 299 TSC 51766 52114 348 cbm104 50795 51269 474 kcls 50852 51165 313 Mimikry 50237 50776 539 ahrshin 49938 50529 591 ilpug 49365 50503 1138 Z.Backas 49812 50041 229 krysteanuh 48738 49235 497 lilyfrancis 48105 48268 163 razvan_iycdi 44505 45640 1135 steveastrouk 45011 45495 484 tqwerty 45089 45482 393 MotaBoi 45121 45329 208 patriots8888 44982 45261 279 Rob+O 44259 44832 573 Bot1398 43650 44818 1168 possum888 43428 43711 283 zack247 41609 42126 517 drknotter 41522 41900 378 splazem 40970 41411 441 Tornado96 40930 41325 395 qazwsx755 40000 40561 561 Data643 39917 40143 226 canucksgirl 35921 36970 1049 shadowninja31 36635 36787 152 lil+larry 36225 36655 430 Sorunome 35713 36260 547 Derin 35739 35942 203 peguiono 35157 35272 115 plane+phanatic 33557 33743 186 zurichko 31159 31388 229 CrayfishYAY 31007 31120 113 Dr.+Pepper 29782 30002 220 poofrabbit 28326 29225 899 Twinmum 28887 29165 278 m6233555m 29021 29079 58 Knex_Gun_Builder 28927 28997 70 fdmjh 28273 28476 203 nutsandbolts_64 27731 28013 282 Legofanatic 27704 28009 305 aeronut01 27481 27700 219 colorex 26205 26555 350 bwrussell 26205 26370 165 mJusticz 25728 26148 420 Zaphod+Beetlebrox 24652 25857 1205 floris2burn 25396 25506 110 Tom+Buckey 25044 25106 62 mistyp 23747 24054 307 Nostalgic+Guy 23633 23743 110 RollerScrapper 22965 23320 355 robot1398 22637 22975 338 knexinventer 22419 22668 249 zascecs 22419 22475 56 acidbass 22144 22354 210 username252 20908 21088 180 A-Nony-Mus 20757 20983 226 knexsuperbuilderfreak 19112 19165 53 bricabracwizard 18616 18846 230 iproberry1 16561 17294 733 Football+viking+boy 16687 16853 166 LoneWolf 15908 16072 164 Mahmoud+Alaa 14812 15959 1147 Super_Nerd 15499 15829 330 masterochicken 15691 15759 68 Kryptonite 15486 15722 236 RNB 14382 14522 140 NatNoBrains 14257 14398 141 FrozenStar 13824 13904 80 king1000 12975 13024 49 NachoMahma 12920 12942 22 moocowdog 12373 12452 79 cherishcherub 12118 12168 50 furrysalamander 11879 12046 167 TheMacyC 11389 11630 241 slithien 11454 11551 97 Kaptain+Kool 10951 11089 138 35Timmy 9722 9905 183 tech+dawg 9101 9601 500 wareneutron 9128 9268 140 thegeeke 7929 8387 458 tbcross 7880 7922 42 Randomguy65 7587 7749 162 emilyvanleemput 7075 7648 573 ElvenChild 7220 7307 87 happyjo 6941 7001 60 MegaMetal8 6675 6739 64 solarblade90 6184 6229 45 jamesdude 6187 6210 23 BladeFyre+Studios 5922 5963 41 Jag56 5852 5953 101 BLUEBLOBS2 4929 5879 950 nfk11 5664 5697 33 TheAwesomestDude 5234 5284 50 White+Shadow 5007 5147 140 rockhardmj 4912 5126 214 9400dk 5020 5038 18 mg0930mg 4744 4757 13 neuropol 4616 4686 70 iApple+guy 4410 4522 112 AwesomeSwordGuy 4208 4241 33 shadon 3729 3761 32 LivStoleYourPie 3482 3525 43 cj81499 3074 3085 11 cyanyears 2957 2983 26 PotatoCoffee 2817 2902 85 gmxx 2844 2867 23 Black+Panther+Knex 2292 2313 21 vicvelcro 2199 2239 40 j.g.kuster 2111 2157 46 Mutantflame 2123 2125 2 The+Chunky+Sniper%21 1757 1806 49 FastLearner 1596 1611 15 daredevil499 1522 1551 29 protolabs 1110 1185 75 kyleslab 1058 1082 24 Jeff+Kallaus 1037 1045 8 CeruleanPhoenix 806 823 17 Alexvolos1 607 610 3 Fr-Pa-Co 479 483 4 %28YOUR+N 267 270 3 heratio 247 249 2 schumi23 127 132 5 lightingever 14 14 0

Topic by Jayefuu    |  last reply


eTextile Lounge: Featured Project for Tuesday 21 June: Touch Glove

Tuesday 21 June 2011 8PM denver time The innovator of the Touch Glove Instructable will talk about her project on the eTextile Lounge. Join us Tuesday's at 8PM on lynne bruning's uStream channel for eTextile tips, tricks and innovations.

Topic by Lynne Bruning  


Repair is the new recycling

I came across this and reallised that I 'totally agree with it!What do you think about this concept, idea?For more info visit Platform 21Thanks! Comodore

Topic by comodore    |  last reply


Does anyone believe the world is coming to an end on Dec 21, 2012? Answered

Now that it's 2012, you can't help but here all those dooms day discussions about the Mayan Calendar and the end of the world on December 21, 2012. For the record I don't believe the world is going to end just because the Mayan's said so.  I mean really? There isn't too many Mayan's left nowadays... why couldn't they figure out their own demise? Ironic, isn't it? What do all of you think? BTW: The best argument "For or Against" will get best answer credit. :D

Question by canucksgirl    |  last reply


Join me at the Craftcation Conference in Ventura, CA - March 21-24

  Have y'all heard of this? I heard about the Craftcation Conference last year and wanted to go so badly, but I had just moved to California and was still getting settled. But this year I'll be there, along with some other fancy Instructables ladies! (Scoochmaroo is presenting three different times over the weekend, and angelabchua will be there too!)  If you're near California and you love to craft or if you own a small business you should make the trip. :D It's going to be held in Ventura, CA at the Crowne Plaza Hotel. Click here to check out ticket prices and find out more about all the awesome things your tickets will cover! Registration closes March 1st so you better get on it! Tickets are available for the whole weekend, and you can even get a daily ticket for just Friday or Saturday. You should check out the schedule - there are so many amazing workshops and speakers I can't handle it. I have no idea how I'll choose where to go each day! The 2013 schedule includes: SMALL BUSINESS: starting a creative business, social media & PR, wholesale, retail, craft fairs, ETSY, legal & financial, publishing and more! DIY CRAFT WORKSHOPS: sewing, knitting, soap from scratch, photography, letterpress, terrariums, bookbinding and more! DIY FOOD WORKSHOPS: pickling & fermentation, artisan ice cream, salted caramels, farm to fork meals, seasonal jams, rustic italian cooking and more! COMMUNITY EVENTS: happy hour networking, bbq opening celebration, pop-up shop, yoga, dance party and more! (link to www.craftcationconference.com) Still not sold? Check out this video from last year's Craftcation:   Craftcation 2012 from Letter Box Films on Vimeo.   You know you need to come. It's going to be so much fun! :D

Topic by jessyratfink    |  last reply


can a front derailleur for a 12-21 speed bike work on a 10 speed?

My front derailleur broke today(SO LAME!!) but i found a new one on amazon pretty cheap, but it says it's for 12-21 speed bikes

Question by .happy.hippie.    |  last reply


Anyone have plans for a queen size bed with 21 inch clearance underneath?

Hi!  I'm looking for plans for a queen size bed with 21inch clearance underneath for storage that is super sturdy.  I have some ideas, but I could really use some more help.  And, like I said, I need something that has proper support but has lots of space underneath for storage bins.  Anyone have any ideas?  Thank you!

Question by E D    |  last reply


Any project ideas for a 21 year old unemployed high school graduate?

I have an unemployed 21-year old high school drop-out son, who has been in rehab several times. His dad is letting him stay with us, temporarily, despite my saying I want him out. (Son's room-mate is suddenly all excited about being a Jehovah's Witness -- my son's pagan lifestyle is not jelling well.) Being co-dependent and all, I am trying to find some kind of project to keep him busy and act as "barter for rent". We live in a culture-starved, neighborhood covenants enforcing, Republican or Die, suburban neighborhood. Backyard. Already have a shed -- although it's probably going to need to be replaced sometime. My son is very good at barbecueing. Any ideas?

Topic by LauraGrimes    |  last reply



Mother Earth Fair, Seven Springs, PA, USA Sept 21-23 2012

Hi everyone! For those who are interested in modified vehicles, electric vehicles, DIY Hybrids, renewable energy and more, you might want to check out the Mother Earth News Fair. It's coming up really fast. If you are in Pennsylvania, come check it out! I'm going to be a speaker there giving presentations on my DIY electric motorcycle, my most current DIY Hybrid Pickuptruck project, and more! Wear your Instructables shirt and come find me! -Ben Nelson  

Topic by bennelson    |  last reply


updated 06-21-13 K'nex Directional Mine Prototype w/ video link

I just wanted to let the community know I am still alive and well. Also check out this new directional mine I've been working on. It is an early prototype but it is currently shooting 25-50 green rods 50ft with a good spread! Check out the video to get a sense of the impact. Here is the link! http://youtu.be/qjnVRb7sp6o pic below is random Also one last thing while it is fresh on my mind... I've noticed a growing number of designs that use modified K'nex pieces that are cut or mangled somehow to get the gun to function or look a certain way. I'm not saying that this is a sin however I would like to challenge each of us to challenge ourselves by building guns that are true K'nex guns with true K'nex unmodified parts. I have been guilty of this once in the past myself so don't take this to heart. All I am asking is this... I am impressed and more inclined to build a gun that doesn't required or include any broken pieces over a gun that requires any. It is a pet peeve of mine because to me the art of building is using what we are given and creating with wit and ingenuity something great! Again I am not condemning people... I only trying to encourage the art of K'nex guns that don't use broken/modified pieces. Lets do our best to clean up our work and build impressive guns without changing the pieces! Thank you to those that build clean keep it up I am excited by the community at large. It is very cool to see everyone's designs I learn from each and everyone of your creations! Keep up the good work, and lets continue to get better! 06-21-13 Ok I spent some time working on this new powerful directional mine and I must say it is pretty cool. The prototype was built specifically with power in mind. Every part of the prototype is bulky and heavily reinforced. Because of its sturdy design I have loaded it up with over 20 size 64 rubberbands which as you could imagine has quite a bit of force behind it! So naturally it shot pretty incredible. My issue with it was not how it functioned but how it looked and considering I built it more as a test of concept than an actual product to use in a war I wanted to scale it down and see if it still preformed as well in a much smaller package. IT DOES! The newer more compact design is currently being built and tested. Initial tests are promising and I am truly excited to release the designs ASAP. The goal of my new compact mine is to have a easy to use sturdy mine that could be loaded up with 25green rods or more and shoot then in a good pattern directionally at the desired target at 25-50ft away. This is a tall order for such a compact less rigid design. However initial tests are promising. One more thing... I plan on releasing a series of Instructables on how to build my favorite "war" creations. I realized that many of my favorite designs have never had proper building instructions. It is important to me that my designs are up to date and made clear for everyone so that the build is flawless. I can promise this... My designs are only as good as those that build them mean this... If my designs are not followed piece by piece, step by step, then don't expect the same or even similar results that my guns or whatever were designed to achieve. If I say to use a size 64 rubberband that means use it. lol. I promise that result will vary greatly if not built completely and utterly the same as I show. LOL with all that being said I plan on releasing instructables for the following... My latest designed TR8, Grenade, Directional Mine, Fin Ammo, and more. The first release will most likely not be for a few weeks at a minimum depending on when I have time to due so. Again thank you everyone for your support over the years I hope you have had fun building with me and I plan on continued builds in the future. Keep a lookout for the new 2013 instructions!

Topic by Knex Lego Maniac    |  last reply


Renewed pro on May 21, now I have an email saying it's about to expire

My pro membership  expired on may 21. I had a free 3 month pro membership pending from a featured  project which kicked in automatically, extending my pro until August. But today I got another email saying that my pro membership is about to expire, and it's going to roll over  to another pending pro membership. This would only give me 10 days of use from the  3 month membership.. This is my current membership: Length 3 Month Pro Membership  Started on May 21, 2012 Given by Instructables Robot (Gift code: science*****) Ends on Aug 22, 2012 This is the text of the email: Hi eclipsed, Your current Instructables Pro membership is about to expire.  It will automatically roll over to your gift membership "trace****".  You don't have to do anything.  This email is just to let you know. Thanks for being a part of the Instructables community, and for supporting DIY and Instructables! Cheers, Instructables Pro Robot

Topic by eclipsed    |  last reply


Live Chat With Eric on Friday 2008-11-21 2:30 - 3:30 PM PT

Have a question about Instructables? Wonder what I do all day? Want to learn how to do something on the site? I'm having office hours on Friday Nov. 21 2:30 - 3:30 PM PT, where I'll join the Instructables chat room to answer questions and hang out. I'll post a sticky comment on the chat room forum topic so you'll know when I'm currently there.If this time doesn't work for you, I'll also be chatting on NPR's site on Saturday.See you soon!

Topic by ewilhelm    |  last reply


oh boy oh boy oh boy.... NYC Maker Faire is coming Sept. 21-22....

I may have a SHOT at going to the Maker Faire in Queens NY,  this coming Sept 21-22.  I am not sure if I will be able to scrape together enough to stay overnight or not (which would be the ONLY way I could be there both days), but I may be able to "earn" the tickets in any case. I am still at a loss however to explain to my wife why I want to go back since I have SEEN it already (*sigh* yes, I've told her repeatedly it is different each year).   Any suggestions about that would be appreciated.  Anyways,  are ANY of you all going to be there ?  One, or both days?  Will the Instructables team be there?    I hope I can be.....

Topic by Goodhart    |  last reply


Rock Music on Classical Instruments?

For our spring orchestra concert at my school, I convinced my teacher to pick an arrangement of 21 Guns by Green Day as one of our pieces. Why pick 21 Guns over Don't Stop Believing? Because I like it better. THAT's why :P So...I was wondering. Has anyone else played an EPIC rock/punk/alternative or just something totally UN-CLASSICAL on a classical insturment? Perhaps something as awesome as a Green Day song? I play violin btw xD

Topic by CamillaLuvzMusic    |  last reply


Wiring a square D class 9016 GAW-21 vacuum switch to control my 240V vacuum pump

I am confused as to how to wire my vacuum pump to this vacuum switch.  The pump is 240 V single phase and I need it to come on at about 22 inches of mercury and shut off at about 28 inches of mercury.  I have two line leads coming from the pump that need to be switched.  I don't understand the diagram (first picture) that covers the connection terminals.  I think if I can get it wired properly I can set the on/off points using my vacuum gauge and trial/error.  Can anyone help me with this?

Topic by rmandrell59    |  last reply


Recent Answers

Filtering answers by "recent" doesn't work? They all seem to be old. Win7, FF 21 Probably caused by an addon? IE works fine.

Topic by explosivemaker    |  last reply


monitor and tv-tuner

Is there a way to connect an old 21 inch monitor with 5 rgb+hv bnc connectors and an external tv-tuner to watch television with?

Topic by enterplus    |  last reply


Looking to make a basic LED scoreboard

? Looking to make a simple LED scoreboard for scoring "Bags" games (Cornhole). All i Need is 2 rows of 21 LEDS on each side of a vertical board with the bottom denoting scoring "1" and the top as "21". And I'd like to have some sort of momentary button to press that would move the circuit from 1 to 21 one increment at a time (moving up, turning on the next as the last one turns off). I could just put switches on each led but I am trying to avoid that. Any advice would be helpful. Thanks PS , if all the lights stay on until i get to the top and then able to reset it, that would be fine too, Just trying to eleviate the use of multiple toggle switches.

Question by djtonyc77    |  last reply


Office siege weopons? Answered

I need to build an office siege weopon that launches a ball 21 feet! It needs to be smaller than 8x4. PLEASE HELP!!

Question by Goalie1    |  last reply


how to attach a Usb mp3 Module inside 2.1 home theatre ?

Please Provide instructions in details

Question by timzzziii    |  last reply


Looking to make a simple LED scoreboard?

Looking to make a simple LED scoreboard for scoring "Bags" games (Cornhole). All i Need is 2 rows of 21 LEDS on each side of a vertical board with the bottom denoting scoring "1" and the top as "21". And I'd like to have some sort of momentary button to press that would move the circuit from 1 to 21 one increment at a time (moving up, turning on the next as the last one turns off). I could just put switches on each led but I am trying to avoid that. Any advise would be helpful. Thanks PS , if all the lights stay on until i get to the top and then able to reset it, that would be fine too, Just trying to eleviate the use of multiple toggle switches.

Question by djtonyc77    |  last reply



Recent shows Answered questions

Win 7 FFox  21 On selecting RECENT when looking at the list of Questions in the Answer area I see all the ANSWERED questions.

Topic by rickharris    |  last reply



LCD monitors for sale??

I need a lcd monitor for a project. It needs to be somewhere between 17 and 21" inch. I don't have a very big price range but will pay for shipping. Thanks!!!

Question by 16zzundel5    |  last reply


what does every body else think of 21122012 ? is the world gona end ?

Do you guys think the world is going to end on the 21 of the 12 2012?

Question by arduinoe    |  last reply


I need LCD monitors!!

I need a lcd monitor for a project. It needs to be somewhere between 17 and 21" inch. I don't have a very big price range but will pay for shipping. Thanks!!!

Topic by 16zzundel5    |  last reply


Javascript help?

After figuring out how to use arrays and turning them into strings, I now need to do floating point operations with the variable. To first I created an array:      var = array1 = [];      var = array1value = 0; then, I add tack in numbers and operations when the right button is pressed, satisfying the corresponding if statement. if ( condition_1 = true){     array1.push(1); } if ( condition_2 = true){     array1.push(2); } if ( condition_3 = true){     array1.push(3); } //(you get the idea) if ( condition_A = true){     array1.push("+"); } if ( condition_B = true){     array1.push("-"); } if ( condition_C = true){     array1.push("*"); } if ( condition_D = true){     array1.push("/"); } (did you notice I had to add quotes to the operators? otherwise I get errors.) Anyway, then I proceed to take the data inside the array, and 'compress'  it into one string of characters. if (array1.length === 1){     array1value = array1[0].toString(); } if (array1.length === 2){     array1value = array1[0].toString() +                            array1[1].toString(); } if (array1.length === 3){     array1value = array1[0].toString() +                            array1[1].toString() +                            array1[2].toString(); } etc. you can see the pattern (also can anyone tell me how to convert all this redundant code into a nice for loop? I couldn't figure it out, so I just did the above all the way up to array.length === 13) Then finally, I make this appear as text on a output, and I can see the final value after pressing buttons and stuff, say, 534+902/21. So I would expect that if I save this in a new variable, that it will perform the math operation: except the new variable just returns the same exact thing: 534+902/21 var newVariable = array1value So I tried adding and subtracting some numbers from array1value, and the output of the newVariable is an error. I believe this is because although as text, array1value appears as 534+902/21, in actuality, it is *really*   534 + "+" + 902 + "/" +21. or maybe as "534+902/21." How do I force javascript to convert this back to 534+902/21? Also, please don't tell me to google it, or find java tutorials, I have already searched for half the day and don't want to watch 2 hour long videos on programming. 

Question by -max-    |  last reply


How do you make this

Http://www.engadget.com/2010/07/21/kinetic-wall-sculptures-are-impossible-to-look-away-from-video/ Could someone draw like a sketch of how it works 

Topic by For science158    |  last reply


The Roaming Robot Round Two (Mt. Fuji)

I'm not sure if this shot works with the clouds, or if it would have looked better on a clear day. For more Fuji shots check out days 21 and 22 on my website.

Topic by Tetranitrate    |  last reply


Prizes Announcement

I am a finalist in the 'Made with Yarn' Contest, and the Judging closed Midnight Nov 21, and I have been going crazy with suspense wanting to know who won the prizes.. Little help?

Topic by VaanyaW    |  last reply


Meteor Shower in late April

Upcoming shower:Day: April 21 - 22Constilation/type: LyridsFrequency: 16 - 30 per hourIllumination: 5.4%For the meteor shower calender, check out these site I found:http://www.cultcase.com/2009/01/7-major-meteor-showers-you-can-expect.htmlhttp://theskyscrapers.org/meteors/index.php/year/2009http://www.seasky.org/astronomy/astronomy_calendar_2009.htmlhttp://stardate.org/nightsky/meteors/http://www.skyandtelescope.com/observing/highlights/36787804.htmlNotice: These are not my sitesNotice this also: Some info ranges, but the dates stay april 21 - 22 (Or just 22)

Topic by Flumpkins