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Which wire is which? Answered

Ok, I have this solar panel I was given, and a knex motor without a battery box, and In need to test which wire is positive and which is negative on the solar panel. I am no good at electronics, though I have done soldering before. I was wondering, how do I test to see which is positive an which is negative on the panel? I hope to join it to the motor to have a very powerful, eco-friendly solar model.

Question by TheFoofinator    |  last reply


Which components and soldered to which?

I have bought an assortment of resistors and capacitors and circuit board s, but how to make Circuit board I need to make a circuit board for a project. It is all 12vdc, I have a 1a fan and a 6a thermoelectric device one setting 1, plus another 6a on setting 2, and a 3rd on setting 3 So 1 is 7a 2 is 13a 3 is 19a How to make the board. . Also a second device has the 1a fan plus a 4watt element, plus another 4w on setting 2, plus another 4w on setting 3 So 1 is 1a and I think 0.4a= 1.4a 2 is 1.8a 3  is 2.2a. I think I need to know what components to use, Right now I have each portion wired directly to the switch which is directly wired to the battery. I have burned out one of the 4watt units (I assumed it would just draw the power it needed) so I don't want anything else to burn out. Eventually I wanted to have a rotary multiple switch controlling both sets with a neutral in the middle (if I can find it) Printing a circuit board is next to learn,  but I already bought several boards and various assortment of components, just don't know which ones to use

Question by Johnieahenderson    |  last reply


Which glue??

I want to attach pieces of tinfoil on chicken wire for my project. Which glue to use and it will be outside!? Thanks 

Question by ChristinaT45    |  last reply


which is better

Which is better A safari (doesnt load pics but is fast) B firefox (loads pics but is a little slower) C opera please lock in your votes now

Topic by ich bin ein pyro    |  last reply


Which one?

I have two guns I could post. One is a grenade launcher pistol. The other is a pistol. the pistol is done but the launcher needs to be finished. So,which one?

Topic by strato96    |  last reply


Which Logo?

I want a new logo for my youtube. Which do you like best? These are all edited Jack White logos. 

Question by freeza36    |  last reply


Which gun?

Hi everyone! i want everyone to vote on which gun i should build after i post my T36 Choices: New semi auto gun Fully Automatic With trigger True shotgun with pump action Extrem V2 Thanks for choosing!

Topic by Der Bradly    |  last reply


WHICH ONE? Answered

TODAY I GOT A CIRCUIT THAT'S A USB BLINKER CIRCUIT I FOUND THE TRANSISTORS ARE NAMED LIKE THIS " 2x NPN General Purpose Transistor (Q1, Q2) " I DON'T KNOW WHICH TRANSISTOR I WOULD USE TO MAKE THIS CAN ANYBODY ELABORATE??

Question by ubdussamad    |  last reply


which are pros?

So what now and first post are pros only. But no pro icon?? How do we know? Can the pro icon be in front of the topic? UPDATE: Fixed! Thanks Eric!

Topic by jedi pen-gui-n    |  last reply


which of these are better? Answered

Http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=94076 http://www.harborfreight.com/cpi/ctaf/Displayitem.taf? itemnumber=92880http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=40457  

Question by NatureBoom21    |  last reply


Which is better?

Well i was just wondering which do you think is better ask.com or google.com i know google is more popular but which one is overall better? ask.com:pros: Can see screen shot of website. shows pictures of the search item on the side. shows blogs on side. gives you suggestions. I thinks thats it now for google. google.com:pros: Most browsers have a little bar at the top for searching. Most popular searching site. Can't think of anymore.. ask.com:cons: Not very popular All i can think of. google.com:cons:doesn't have all that stuff that ask.com has. That seams to wrap it up. What do you think is better? Also if you have any thing to add on the pros and cons list post them here.

Topic by Easy Button    |  last reply


Which Processor?

Hello everyone. I'm new here and I have a quick question about processors. I'm working on a project that requires a device to take inputs piezo buzzer elements and trigger an LED. The catch is I need a programmable chip so I can have pre-set outputs on the LEDs. I'd need something that can be rewritten (like an EEPROM) I've been thinking abuot using a PIC or a BASIC Stamp but I'd though I'd do a bit of research first.

Topic by mrpaps    |  last reply


Which electric motor for which project?

OK, so I got two projects for this winter. One - building a lathe for woodturning. Not a mini-lathe, but a bit more serious piece of equipment that I could use for some furniture details. Two - apple mill for cider. And I have two salvaged electric motors laying around. One is from an old Remington chainsaw, 1400 W and probably some quite serious speed. The other one is from a pump, actually water automate that sat on my 15-meter borewell. Do not have the data, but most probably slower (and it is way bigger). Problem is, I have zero experience with such stuff. For setting up the electricity side I will probably call in the cavalry, but first i need to decide, which motor I will use for which purpose. So, any advice, gurus?

Topic by wahur    |  last reply


Which Stepper motor and which controller?

Hello, Still in research mode for my own CNC machine which will be Arduino based. But, as everyone is using different motors and controllers (drivers?), how do I choose the right one for me? My machine should be able to do soft materials like wood and plexi/acrylic but I als want to be able do mill/cut aluminum, as I am restoring an old car and parts are not easy to get hold off. For my board I was thinking of an Arduino UNO (like most) but then, which motor to go for? Uni or bipolar? 17, 23, 34? And which driver? gShield / CNC Shield V3 / Dual step driver? A4988? 1 board per motor or can I combine them? How to get a smoother run then 1/8 steps? (Found CNC Shield V3.0 + UNO R3 + 4pcs A4988 Driver for £15???) I have never soldered anything, but I am a fast learner. So far when it comes to electronics, I managed to hardwire a stereo without harness into my car, speakers, radiator fan circuit and some door controlled LED's. Far away from soldering of building a CNC, but I am up for the challenge. I know there are a lot of questions in this post, but I appreciate any explanation why someone chose one motor over the other etc.... Any information is highly appreciated. I rather research more then building something and then have to start over again. Kind regards, Red

Topic by redmarien    |  last reply


Which is best channel ?

I want to make my first in instructables. so which is best channel for DIY?

Question by kavya123    |  last reply


Which cheap mobile?

Hi, I am interested in getting a 'smart' (ish) phone, wifi, java etc.. I have found two, and wondered, 1. Which one would you pick? (of the two below) 2. Why? 3. Do you know where to get any other cheap <$100 phones? http://www.dealextreme.com/details.dx/sku.31634 http://www.dealextreme.com/details.dx/sku.39625

Question by JavaNut13    |  last reply


Which computer is better? Answered

Hey, I'm trying to figure out which computer I should buy. One is an HP Pavilion HPE H8 with an Intel i7 third generation quad core at 3.4Ghz. The other has an AMD FX100 Hex core processor at 3.5Ghz. It sounds like the AMD is the winner, but I just want to be sure. I plan on running games such as Battlefield 3, Crysis 2, Saints Row 3, Medal of Honor, Need for Speed World, and about 7 or 8 other smaller games. The computer with the AMD processor has 8GB RAM and the i7 processor has 10GB, both have 1TB sata 7200rpm HDD. Which is faster? Which will run best?

Question by knexpert1700    |  last reply


Which is the better amp? Answered

Hey Guys, I have attached two schematics of two different amps. Can you tell me which is better like  better quality, louder etc,

Question by SA-DIY    |  last reply


WHICH IS INPUT AND OUTPUT OF THIS? Answered

Tbd392nr lcd inverter

Question by yhdesai    |  last reply


Which CPU is faster? Answered

A 3.6Ghz Dual core, or a 2.8Ghz Quad core?

Question by bowmaster    |  last reply


Which Nerf gun? Answered

I wanna get another nerf gun '9i have recon and hyperfire its gonna be raider or deploy but i dont know which one please help MM8

Question by MegaMetal8    |  last reply


WHICH IS THE BEST LAPTOP?

I want to purchase a laptop for my daughter. 15 inch screen, win xp, fairly fast. What is your opinion of Dell?

Question by tmckinneyebony    |  last reply


Which wire is positive?

I have an electret mic that I want to use, but it has green and a black wires on it, would green be positive? Or would black be?

Question by Zem    |  last reply


Which microcontroller to choose?

Hi all, I need to use a microcontroller for my project and am thinking of getting the arduino UNO R3 development board which composes of the ATmega328 microcontroller. I have to connect a small motor, a 16x2 LCD display and a miniature heating element to the arduino. I would like to know if the UNO R3 is suitable for my project. PS: I am very new and noob regarding microcontrollers

Topic by kurtselva    |  last reply


Which microcontroller to use?

I was wanting to create a couple things using a programmable device, but without the bulk of an arduino board. I would prefer an SMD or qfp version. I am using JCBPCB to do my PCB production.

Question by Guacamolee    |  last reply


Which Components to use? Answered

I want to make a circuit that is powered by 220v ac. It consists of a cooling fan that requires 12v, 0.7a, a  PCB with 10 LEDs in parallel that requires 0.25a, 3.5v and a single led that requires 3.5v,0.025a. I know how to calculate resistor values but it would be better if you give the values. I want to know which diodes should I use to make the rectifier and should I use a capacitor? In short, I want to know  how to set up this circuit, what components to use and their value and power ratings.

Question by Ahtasham Ahmad Mohtashim    |  last reply


Which travel guitar?

I would like to buy either the Martin Backpacker or the Washburn Rover. The Rover is cheaper, and comes with a hard case. But, the Martin is a better quality guitar. What do you think? http://www.guitarcenter.com/Washburn-Rover-Travel-Guitar-511819-i1171847.gc http://www.guitarcenter.com/Martin-Steel-String-Backpacker-Left-100406834-i1167436.gc

Question by freeza36    |  last reply


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  


Which is the better laptop?

I am looking for a laptop for school. Which will deliver the better overall performance? Acer Aspire v3 Processor Type: Intel Processor Model: i7-3630QM Processor Speed: 2.4GHz Processor Core: Quad-core Cache: 6MB Operating System: Windows 8 64-bit System Memory (RAM): 6GB Type of Memory (RAM): DDR3 Hard Drive Type: SATA Graphics: GeForce GT 730M Video Memory: 2GB or Dell Inspiron 17R 5721 Processor:    Intel Core 3rd Generation i7-3537U Processor (4MB Cache, up to 3.1 GHz) Memory:    8GB RAM at 1600MHz HardDrive:    1x1TB SATA Hard Drive VideoCard:    Intel® HD Graphics 4000

Question by cardboarddude    |  last reply


Which gun is better?

What one is better to buy with my Christmas money?? I want a pistol that is over 400fps and gas powered. I ALSO WANT IT TO NOT BREAK EASILY. It should last a while. http://www.amazon.com/Crosman-C31-air-pistol/dp/B001C0E6JS/ref=cm_cr_pr_sims_t http://www.amazon.com/Beretta-Elite-CO2-Airgun-Pistol/dp/B001DCB54O/ref=pd_sbs_sg_2

Question by Football viking boy    |  last reply


Which components to order? Answered

Hey Guys, As many of you may know I just started electronics (reason for annoying question) and I was ordering stuff online and I couldn't choose. (Crappy grammar in previous sentence) So I  was wondering if you guys could help me by telling me what components I would need fo some average projects like LED's, resistors, transistors etc. I would really appreciate it if you could help. Thanks in advance -Prickly Potato (Oh and once again sorry for the grammar I don't know whats wrong with me atm)

Question by The Prickly Potato    |  last reply


Which soda is the best?

I suddenly got this idea to post a topic in which soda is the best. If this topic has already been posted, please notify me so that I can remove it. Votes will be closed at October 15. The winning soda will be announced after I count all the votes (either the 15th or 16th), and whoever voted for the winning soda gets the good feeling of being better than everyone else. Capiche? (8.12.08) EDIT: Wow. I never thought this would become so popular in about... 5 days. Thanks for voting, everyone! RULES: 1. You may vote for up to three DIFFERENT sodas, once each time. 2. You may not vote more than once. 3. You may not start a conversation with someone on this forum that has absolutely nothing to do with the topic. 4. There is no #4. 5. Your choices are: Anything you like that's a soda. Remember to keep your votes to up to 3 different sodas. Nothing alcoholic, please. EDIT (8.13.08, somewhere around 12 PM Central Time) The results so far. In first: Coke with 5 votes. In second: Jones with 4 votes. And the sodas tied for third: Root Beer, Cream Soda, and Dr. Pepper, each with 3 votes. Sodas with 2 votes: Mountain Dew, Diet Coke. Pepsi, and Canada Dry. Sodas with 1 vote: SURGE!!!!!!, Virgin Cuba Libre, Sprite, Sprite Remix (-_-;;), Vanilla Coke, Sunkist, Cherry Coke, Fresca, Limca, and 7-Up. Thanks again for voting, everyone!

Topic by RokuXIII    |  last reply


Which rotary tool?

I recently got some money from the government for my good grades (YAY!) So now I can get myself a nice rotary tool. BUT I can't seem to make a decision! I have 2 brands in my sights Dremel (No specific model/kit in mind yet) Gyros (http://www.amazon.com/gp/product/B006ZEJA56/ref=ox_sc_act_title_1?ie=UTF8&m;=AXL381AZQM9Q1) And if it isn't a POS Northern Industrial (http://www.amazon.com/gp/product/B000JFO1TM/ref=ox_sc_act_title_2?ie=UTF8&m;=AF8EGQ3KRZQB6) I am leaning more towards Gyros as their attachments seem pretty good. Its also significantly cheaper than Dremel. Please give honest feedback. Thanks!

Topic by micraman    |  last reply



Arduino Boards Which is the best?

Arduino (uno <> duemilanove)  my focus will be on robotics projects as well as LED 

Question by Avadhut.Deshmukh    |  last reply


Which DealExtreme knife is best?

So, I am looking a cool knives on dealextreme, and I was wondering, which is the best?links:http://www.dealextreme.com/details.dx/sku.18076http://www.dealextreme.com/details.dx/sku.6198http://www.dealextreme.com/details.dx/sku.7011http://www.dealextreme.com/details.dx/sku.11620

Question by Flumpkins    |  last reply



which is better? minecraft or roblox

Which is better? Mnecraft or Rolox? Minecraft is just a boss and roblox is just a loss(that was an epic rhyme)

Topic by nfk11    |  last reply


which is better Vontage or Skype?

Can anyone tell me which is better Vontage or Skype? I’m in Afghanistan and I have a pretty good internet connection, but we need REALLY good speaker phones for calls back the US. Which company is better and which speakerphone works the best with them? Thanks.  

Topic by inchman  



Which is positive, negative and ground? Answered

 i cant figure out which prong is which just by looking and i dont have an expertise in electronics, so if you guys could help that would be wonderful, heres a pic 

Question by gantyman    |  last reply


which do you prefer

Which do you prefer you tube or metacafe? i prefer you tube well because i do.

Topic by Easy Button    |  last reply


Which ammo is best for a slingshot? Answered

Connector amoo e.g. Grey-orange or a rod like a blue rod. Which one would go further?

Question by I.E.    |  last reply


Which is less in price and best

Insted of Raspberry pi we can use ardunio nano

Question by Sdvs    |  last reply


Which is the FM transmitter antenna ? Answered

When I wanted to expand my FM transmitter broadcast range I found a White and Red and Black wires please specify me which is the antenna one .

Question by achraf52    |  last reply


Which is better? Coke? Or Pepsi?

What do you think is better? Coke or Pepsi? I prefer coke.

Topic by ry25920    |  last reply


K'nex contests: Which one?

I've been looking through Instructables and I've seen a lot of different K'nex contests. I have some questions: -Which ones are the main contests? -How do you enter them? -Are there any on right now?

Topic by Masterdude    |  last reply


Which knexers play guitar?

Which knexers on here play guitar?  I was thinking about posting some knex and guitar related ibles, but I want to know what kind of things you want. Any ideas? Thanks, Killer~SafeCracker

Question by Killer~SafeCracker    |  last reply


Which electronics website is best?

For this Christmas I would love to get a Gift Certificate to an electronics website so I can get any component without the hassle of using my parents' credit card. So, which website do you think I should ask for one from?

Topic by Login258    |  last reply


Which would be easier to use?

Which would be easier to use in a circuit:the CRT of a TV set to hold a massive amount of electrical charge-or-a capacitor with a similar amount of holding capacity (capacitance, if I'm correct)?If it's the CRT from a TV, how would one go about using it as a capacitor?

Question by robotguy4    |  last reply