Reverse Graffiti

The artist Moose creates graffiti on walls not by adding paint, but by removing dirt. He's been doing this for a few years now and he originally just used a sock, water, and a bit of soap. In this video we can see that he's moved on up to using a pressure washer and stencils to create 140-foot murals. via Wooster Collective

Topic by fungus amungus 10 years ago  |  last reply 10 years ago

reversing a video? Answered

How can i reverse a video, and with which (preferably free) program?

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

Transformers connected in reverse

Hi can a transformer connected in reverse. if 230v to 12v transformer is connected in reverse,. will it generate around 230v Just some silly doubt. Actually i was trying to find a step up transformer.. which converts 6v to 24v. what exactly its called.

Topic by nominds 8 years ago  |  last reply 9 months ago

Reverse Shop Lifting

You've heard of shop lifting, but have you ever heard of Shop Dropping?"Shopdropping as it's known, is an ongoing project in which artist Ryan Watkins-Hughes replaces the packaging of canned goods with his own artwork, and then shopdrops the items back onto grocery store shelves."Read More...

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

Reverse batik painting?

I was looking through trying to rediscover how to do an art project I did years ago in school. Maybe if I describe it to you, you could very briefly tell me how to recreate what I did. I would be so appreciative--I really want to recreate this project, but I'm unsure how. The assignment was the creation of a painting that was, for lack of a better despcription, like a reverse batik. We were supposed to leave negative-space borders along every contour of every figure and then we painted over the whole thing with black. When dry, we gently rinsed off the black paint and I was very pleased with the outcome. Over the years, however, I've misplaced my piece, and I forget: what kind of paint is best to use? I have some gouache at home, will this do? I would really appreciate just the briefest of responses from you, and then I can get to painting! I'm so excited because I haven't made a painting in years!

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

Is reverse engineering illegal?

Is reverse engineering illegal? Well, if you then go on to sell your version? For example, in an upcoming instructable I'm modding some electronics, well, without revealing my instructable here's an equivilent example: Lets say I buy a little robot at the store, it has motors and the case and everything. Only problem is, it runs on AA's and you want rechargable batteries. Also, the wireless module for some reason is external and is super ugly and annoying. You crack open everything and you find that the needlessly large circuitboards only have about 20 (somewhat) easy to find components that adds up to like 2 dollars. Following traces, you recreate a schematic from the PCB (already did this, that was fuuunnn :P). Now you reengineer the board (still same schematic) so that it's much more compact, you've added a little charging circuit (and correspond boost circuit, replacing a couple of AA's with a lithium ion), and you made it all fit inside the robot (no wireless module just hanging around outside the robot. Now, essentially the schematic is the same, but you've added stuff like the boost circuit and charging circuit. You've also added a few customizing features that make it more special (adding LEDs, microcontroller, cough cough etc.). Would it be illegal to sell a board/kit (incase other people want the board and can't solder smd to good) for people to modify there own robot (same model etc.). Also, the schematic from the reverse engineering is very similar to an example circuit in the main chip's datasheet, and a few other parts are common sense (like some resistors here and there, LEDs, a few extra filtering caps), so the company's circuit is nearly identical to the datasheet, is this illegal to sell?

Topic by guyfrom7up 9 years ago  |  last reply 9 years ago

Is there a switch that reverses polarites? Answered

 Is there or do I need to get complicated?

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

Reversed Bias Diodes?

I really want  some clarity on "reversed bias diodes" whats the point of having a reversed bias diode? when would a person want to apply it to a circuit? if current can't flow through it, wouldnt it just mess up the circuit? Please shed some clarity on this subject for me, it would be greatly appreciated! -Grizzly

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

Reverse proximity alarm ?

If my backpack or suitcase was moved away from me an alarm would go off in the luggage if the luggage was moved more than a few meters . This would be a 2 piece gadget , 1 piece in the luggage and 1 in my pocket . Cheers

Question by Witold888 9 years ago  |  last reply 6 years ago


Im building a multiphase coilgun but encountered a problem. In order to activate secondary phases i need a photoelecric switch. In my case it is TCRT5000 photoelectric switch. The problem, however, is that once the ''beam of light'' is shining on it, the switch is turned on, but i need it to be turned off when ''beam'' is directed at the diode and turn on when the ''beam'' is not directed at the diode. How do I do this? And in this case changing polarities wont change anything.

Topic by mondeluz 3 years ago  |  last reply 3 years ago

How to build a motor reverser?

I have computer fans that I use as fume extractors when I solder. I would like to know if there is something that I could build to reverse the direction of the fans.  On a slightly related note, I have a netbook cooler with 2 fans in it. I have tried reversing the polarity but they won't spin the other way. Can someone help? There are no diodes in the circuit, I have checked. I think it's because the fans can only work if hooked up properly, can someone confirm?

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

How can you reverse chemical reactions?

Question by 10 years ago  |  last reply 3 years ago

How to wire a reverse polarity switch

I have an old Rascal 600 scooter that has a seat actuator that will go up but not down. I have tried to find the problem but can't.  It will operate up and down early in the morning when it is cool but later after it warms up it will only go up. I want to wire a reverse polarity switch directly from the 23VDC system(2-12 volt batteries)to the actuator motor. The actuator motor is 24VDC 12.5 AMP. It has a compression load of 600LBS. The motor has a black and red lead. Please include the size or sizes of wire I will need.  Also please be as specific and simple as possible. A drawing would be especially helpful. Thanks a million and God Bless!

Topic by themanpan68 6 years ago  |  last reply 6 years ago

Car reverse camera with additional front camera - switching

Hi Have a q about hooking up 2 car cameras - one front, one rear and being able to switch between different settings. The monitor I have will automatically change from one camera to the other when the 2nd is powered (eg front on all the time until reverse activated switching monitor to rear camera). The setting I want are these 1 - Forward camera on unless reverse engaged (then reverse camera on) 2 - Forward camera on only (all times) 3 - Reverse camera on only (all times) 4 - Reverse camera on only when reverse engaged 5 - All off Any ideas on wiring this up? Cheers Aaron

Topic by abentley 8 years ago  |  last reply 7 years ago

how can i DIY reverse on Technics 1210 M3D PLEASE?

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

How does one wire a motor so that it reverses automatically?

I'm looking for a relatively simple, mechanical way (by that I mean not using a micro-controller) to wire a motor so that it will reverse direction without being switched manually. The interval is unimportant, and the purpose is to have two spools connected by a loop of string (think reel-to-reel), one of which is controlled by the motor. A low-tech solution would be awesome.

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

12v automatic lid opener

I have a dc 12v winch that I want automatically open a lid of a feeder at a specified time, remain open for a spercified time and then reverse the motor to close the lid for a specified time and the procedure will repeat itself  the next day. I have a timer that will work but I want the motor to reverse automatically.Any info appreciated. Thanks

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

What is reverse osmosis water? Answered

How does it compare to regular osmosis water what about filtered water Can be found in Vitamin Water I had trouble uploading an image, Is anyone else having this problem recently?

Question by Chicken2209 9 years ago  |  last reply 9 years ago

Experimental drug reverses Alzheimer's

From BBC News US scientists say they have successfully reversed the effects of Alzheimer's with experimental drugs.Note that it says reverse, so people can get their memories back! Thoughts?

Topic by Keith-Kid 9 years ago  |  last reply 9 years ago

Can I reverse A USB to PS/2 Adapter?

I have a USB to PS/2 adapter that I want to take apart and rearrange into a PS/2 to USB adapter. Will this work? Or is the circuit only one way? I'm thinking of replacing the female USB part with a male one, and vice versa with the PS/2. I'm not sure how I'm gonna get the thing apart. When/if I get this thing working, I wanna use it with a keyboard for my Xbox 360 (360 only has USB ports, I don't have any USB keyboards).

Topic by Aeshir 10 years ago  |  last reply 6 years ago

Can I take my laptop screen off, turn it around and reassemble it? Looking to have the screen face backwards.?

I have an old laptop and the keyboard is terrible. I would like to reverse the screen so when I close the laptop the monitor faces up. Then I can mount it and add a functioning keyboard.

Question by dlaciv12 10 years ago  |  last reply 9 years ago

Reversing Direction of Power Tool

It would be nice to be able to reverse direction of angle grinder, mototool, and similar tools. Sparks may be flying toward ones face in certain positions. The tool also may also tend to kick due to wheel direction. These tools arent made to reverse. How can one change this?  How can one keep the wheel from unscrewing and flying loose once the motor is reversed? 

Topic by Toga_Dan 3 years ago  |  last reply 3 years ago

reverse camera and park assistance?

Hi I want to build a reverse camera and park assist for my car. Can anyone help me know what components are needed? Regards Yaseen

Question by yaseen_123 4 years ago  |  last reply 4 years ago

Reverse Engineering TheseCeramic Speakers

I recently found these extremely minimalistic speakers online and after repeated failed attempts of trying to figure where to get the materials to make my own (or at least where to get the ceramic cones) I was wondering if anyone here could offer me some guidance on how I could go about building my own similar speakers.  I would love to buy these speakers myself whereas they are a work of art to me, but sadly to a kid in college $500 is an entire year's worth of ramen noodles.  Thanks for all the help in advance.  Here is a link to the official web page and in case it's broken I included a picture of the speakers below.

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

( Reverse and Array ) .. in Assembly language ? Answered

Hi everyone ! I just started studying the assembly language .. I have this question in my assignment but I'm not sure if my answer is correct I'm afraid that I didn't get the question very well -_- so please help me guys this is the question Use a loop with indirect or indexed addressing to reverse " the elements of an integer array. Do not copy the elements to another array. Use the SIZEOF, TYPE and LENGTHOF operators to make the program. and this is my answer TITLE " question 3 - revese and array" .686 .model flat, stdcall .stack INCLUDE .DATA                                    array  dword  1, 2, 3, 4 .CODE main PROC mov ecx, 2 mov esi, 3 mov edi, 0 L1:      mov eax, array[esi * type array ]      xchg eax, array[edi]      mov array[esi * lengthof array ], eax       mov edi, type array       mov esi, 2 loop L1 call dumpregs ; check mov eax, array mov ebx, array[4] mov ecx, array[8] mov edx, array[12] call dumpregs exit main ENDP END main waiting for your help  thank you  dreams,,

Question by CSE251 7 years ago  |  last reply 7 years ago

Would a reversed tuyere system work? Answered

I was just lying in bed thinking of ways to update my forge and boom it hit me.Instead of having an airblast directed upwards with an ash pit at the bottom of the blast upwards,would it not make more sense to have the blower aiming down at the ground so that ash is sucked out of the forge. The vaccum created in turn would move air from above the forge into it and throwing ashes out the bottom.Would this not work?

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

How to reverse the rotation of a vacuum cleaner motor? Answered

I'm possession of a vacuum cleaner engine and I'm trying to reverse its rotation..So far I've tried reversing it's polarity with no success but I looked up the 2 ICs on it's chip and it has a555 timer and a 7-stage binary counter.(see: are only 2 wires running to the engine from the chip so I presume there is no feedback.Furthermore there is a potentiometer hooked up to both the ICs which regulates the speed of the engine (and no AD convertor as far as I can tell) so the voltage changes the PWM output as the engine is rated 230V.All ideas are welcome =)p.s.(I can't supply you with pictures right now, sorry)

Question by Prodigity 10 years ago  |  last reply 6 years ago

Controller for regulating the speed and reversing the spin of AC motor at set intervals?

I would like to build a roller base that requires constant spin, and intermittent reversal of spin direction. In addition, the spin speed should be controlled so I could tune in different rpms ... eg range from 10-100. I am totally new to electromechanics and I do not know where to start. Just buying a motor and connecting it to AC should not be a problem, but the additional control seems tricky.. How can I control the spin/rpm of an AC motor, and how can I reverse the spin direction at controlled intermittent times? 

Topic by l2oBiN 6 years ago  |  last reply 6 years ago


Hi Guys, Lets see what we can do best here: I have a an old NIKON COOLPIX L100 + APPLE iPod Touch Am planning to make out a car reverse cam or probably a car video entertainment system out of it with bluetooth connectivity etc etc  My car has an audio system but no reverse sensors as of now. Any ideas ?

Topic by nacho1234 3 years ago

Opposite Audio Question? Answered

Hi!  Well, I have some sound clips and I want to be able to generate the EXACT OPPOSITE SOUND. Therefore, when I play the clip with the normal clip, they should cancel out.... This probably sounds crazy to try, but its just a little project I'm working on.... Does anyone know a good program that can do this? Thanks!

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

I need help identifying SMT components of a laser pointer driver. Answered

I recently dismantled my 5mW green laser pointer because I was sick of feeding it AAA batteries. I'm using 4 18650 Li Ion batteries now. I found a little trim pot that increases the power output and when I turn it up, two of the driver components get really hot. I would like to build my own laser driver based on the original, but I need help reverse engineering it. I've attached a few photos, including the circuit I determined so far. The node voltages when the laser is operating normally are included in blue. The two main (I'm guessing) components are marked Y2 and MY and I have no idea what they are. MY becomes very hot at high load. Please help me ID them!! Oh right, and I had to put the big resistor on there. It's a 1Mohm. Somehow it's necessary for the circuit to turn on without the pointer body. It's connected from battery positive to the bottom of Y2.

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

Free reverse cell phone look up?

I need to know a free site that will do a reverse cell phone look up. A number keeps calling my house and I need to know who it is. I really need your help. If you are willing to give me the passcode in a pm, that is up to you. Thanks.

Question by Thelonelysandwitch 9 years ago  |  last reply 5 years ago

Has anyone reverse engineered the iphone headset?

I would like to build my own headset using my choice of ear buds and microphone as well as wire up my own control unit for volume and answer controls that I could build custom into my motorcycle helmet.  My attempt to do this by tearing apart the factory iphone headset and soldering components onto the controller board was unsuccessful, i was unable to isolate where to wire my microphone to

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


So, my circuits professor described electrolytic capacitors today, and said that reverse-biasing them could cause a catastrophic, eye-popping explosion. All that in a little metal can? I had to try it! Here's what it takes:

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

What is Hi-Float made out of, and is it possible to make my own? Answered

Hi-Float is, apparently, some liquid you can pump into a balloon to make it stay inflated for a longer amount of time. I can't seem to find anything other than commercial promotion on a Google search, and I'm terribly curious about how it does this, what it's made out of, and whether it would be feasible to make it myself, homebrew-style.

Question by V-Man737 9 years ago  |  last reply 1 year ago

(SOLVED) Break circuit = Make circuit?

Basically, what I want to do is activate something when there is no current somewhere else. Examples of uses of this would include turning an LED on when there is no light on an LDR and turning it off when there is light, rather than the other way around, along with turning an LED on when a circuit is broken by opening a door. Apologies if I have not been clear enough. Is this possible?  EDIT: Thanks to NachoMahma, I have it set up with a transistor. I will post a schematic if anyone is interested.

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

How to reverse polarity digitally (with software) ?

I would like to get a DC motor to spin in one direction for a specific number of rotations and then spin in the opposite direction for the same amount of rotations and continue to do this automatically? I know that changing the direction of the motor is achieved by reversing the polarity from the power supply, but how can this be done without using a switch or potentiometer or any other piece of hardware? I am new to this stuff so any help is much appreciated. Thanks

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

can a battery in reverse act as a resistor??? Answered

I was wondering if for example, putting a 1.5 volt battery in a 9 volt circuit, but in reverse would act as a resistor and take the 9v down to 7.5 volts?  I am too scared to try it, and just wanted to know if it has been tried before.

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

how to electronically reverse an AC motor? Answered

Question by tgferreira184 6 years ago  |  last reply 6 years ago

Self-Reversing Electric Servo Motor?

Is there a circuit that can change the rotation direction of an electric motor that's cheaply and easily?

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

Is it possible to run a power inverter in reverse? Answered

I'm curious as to whether supplying power to the ac out side would result in the dc in side putting out power or the board burning out.

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

reverse test repair circuit boards?

Need  good procedures on repair (locate defective parts) without board schematics.....Im a welder tech and many board schematics are withheld by oem's...i need a good tutoral,thanks,joe

Question by n2diesel 7 years ago  |  last reply 7 years ago

Timed control board for a reversible motor

Hello, In need to connect a control board to a reversible motor so that the motor would rotate in one direction for "x" seconds and then automatically switch and rotate for "y" seconds in a reverse direction. I got the following parts in hand: - reversible motor -;=1 - control board -;=1 - DC adapter -;=1 Control board works and is going through the proper cycle as indicated in description however the motor only rotates in one direction and never switches. Realizing this this something that I am doing wrong with wiring, so hoping for an advice from someone who knows better in terms of how to set it up correctly and which jumpers or anything need to present so that it works and where things should be wired into. I am also attaching an image with descriptions for connectors that I received from the company. Thank you in advance for your advice.

Topic by dxbxlx 1 year ago

Is it possible to have a reversed go-kart?

What I mean is to have front wheel drive & rear wheel steering, as oppose to front wheel steering & rear wheel drive. if so what benefits does it have? Would it be harder to install on a homemade go-kart? Please answer a.s.a.p.

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

"Kiteman" proves theory of Reverse Evolution!!!!!

Http://, my mistake. With the headlines, and the (initially) grainy photos, I thought this was Kiteman- Demonstrating the FACT that intelligent beings can "de-volve" into funky chickens.

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

Servos are reversed with servo.h for my stuff?

I am new to Arduino, but i have spent quite a while today proving that 1500 is neutral but 1700, 1900 , and 2000 is LEFT not RIGHT.  I used two servos as well as two different arduino program style to prove  (myservo.write(30) and writeMicrosends(2000). What Am I doing wrong?  Thanks!

Question by knotlikely 4 years ago  |  last reply 4 years ago

lcd reverse monitor as computer monitor? Answered

I just got a 3.5" lcd monitor from ebay and i want to connect it to my computer but my computer has only vga , dvi and hdmi input and the monitor just composite  the monitor please help me!!!

Question by Andrew_48 8 years ago  |  last reply 8 years ago

Reverse Global Warming the DIRTY way

1)  We are put carbon into the air by burning fossil fuels.   What are fossil fuels?  Plants that were buried eons ago.   How can we reverse the trend?  By burying plant matter, thus sequestering CO2 from the air. Fortunately, there is a convenient way to do so. Put lawn waste and paper in a landfill.  Paper is mostly made from tree farm trees. They'll replant to grow more. New trees absorb CO2 from air.       a)  Bury paper. Don't recycle it.    b)  Bury lawn waste, don't mulch or compost. 2) Since people do burn stuff to keep warm, travel, and do stuff in general, is there a way to do this without as much effect on climate? Yes. Global COOLing happens when particulates (smoke) reflect some sunlight.   So the laudable efforts to produce cleaner emissions from cars, powerplants, etc, also prevents the effect of global cooling.   Ironic that  a filthy smoke belching 1800s smokestack which lead to respiratory problems, etc, would also put out particulates that block some sunlight.      a)  make smoke, not clean exhaust. I welcome responses whether you agree or disagree.  To be perfectly honest, I'm not sure if I agree myself ! Just putting it out there.

Topic by Toga_Dan 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 ==> 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

DC Motor Stop and reverse for a feeder

Hi, I attempting to design a feeder that will raise and lower an access door to where the feed is at. The door will open at dawn and close at dusk. I am trying to design a setup similar to an automatic car antenna. When enough light hits the photocell, the motor engages, travels a distance or hits resistance and stops. When light is no longer strong enough, the motor engages in the opposite direction and after the same distance or it meets resistance, stops again. Is this possible to do without Arduino as I am trying to keep this cheap? If so, what do I need and how can this be accomplished? The photocell is not a requirement as I have seen astro timers that can adjust for the changing sunset and sunrise times. Please help. I've got at least 20 hours of research into this and am hitting dead ends searching forums. A circuit drawing would be an awesome addition!!!!!!!!!!!!!!!! Thanks in advance

Topic by tincupchalice 2 years ago  |  last reply 2 years ago