The forums are retiring and are now closed for new topics and comments. The existing content will remain online and accessible through 2020 to provide everyone the opportunity to save any relevant information. In the spring of 2021, these Community forums will be taken offline.

Topics


What would happen if you apply ultrasonic levitation to water ?

While tinkering with my latest creation, a 6L ultrasonic cleaner, I started to wonder...When using these actuators for cutting or welding purposes a horn is used to provide some amplification of the movement and to get the right shape for the tool.Oil seals, like used on drive shafts are no problem when attached to a node of the horn.And if you ever placed a small diameter horn into some water to test it you know the storm it creates.But what would happen if two horns are used on opposing sides of the container?At the correct distance the same static nodes like we see when levitating in air should appear.What would happen to the tiny cavition bubbles that shoot away from the horn?Am I correct to assume that, at least in theory, it should be possible to create a stable vacuum bubble between the horns?

Question by Downunder35m    |  last reply


BREATH UNDER WATER WITH HOME MADE OBJECTS :O

Does any one know of a way to breath under water using objects from home I don't mean like a snorkal but a full fledged under water breathing apparatus

Topic by Ervineng    |  last reply


36v ebike battery to 12v kayak motor

Hi. I have bought an e bike with a 10ah 36v Li-ion battery pack. Can I use this to power my 12v kayak motor? I have the kayak set up with a pwm currently to control the speed. Do I need a converter to lower voltage. Or can I just use the pwm? Advice please.

Question by jonclark80    |  last reply


How do you inverse the function of a LDR (Light Dependent Resistor) ....? Answered

I know the schematic diagram ... But I don't know how it works ... please can someone explain me the inverse function of a LDR I've posted the schematic diagram also! Thanks

Question by harshesh    |  last reply


Help with an SMD circuit

Hello. I am trying to make something on my car that involves putting an array of orange SMD's in a big circle, one on each side of the car. Every circle has about 85 ish SMD's, how should i connect resistors,and which ones? Can i put them in groups of 10, and put a resistor between each? I have to conect them parallel. Thanks for the help

Question by dsirotic    |  last reply


Identify tool

Not sure what this tool is, gift from grandpa. Looks like some kind if drill press but what is it called & how do you use it.

Question by Rctcjc28    |  last reply


Is it possible to charge a mobile phone from a lemon? Answered

Im thinking, lots of electrodes in one lemon, joule thief and a capacitor maybe...?

Question by dalbyman    |  last reply


Penny model paper planes

In years past I had some printable model paper airplanes that looked like real planes, were aerodynamically shaped, had a penny in the nose for weight, and glided quite well. I have lost the folder in moving classrooms, and I can't seem to find them using google. Has anyone ever heard of these, and have a possible source? My favorite one was an older MIG.

Topic by pleasedontspamme  


walkie talkie circuit diagram?

Pls I need a simple circuit diagram of walkie talkie that I can use for my project with detail information. details and circuit can be send to my mail: enochaj@yahoo.com Tanks

Question by Jiya Adama    |  last reply


Expected unqualified-id before 'void'

I m facing a problem in this code during implementationi m using wemos d1 r1 controller board.i m attaching a code.the error is webtwit:52:1: error: expected unqualified-id before 'void' void setup() { ^webtwit:49:16: error: expected constructor, destructor, or type conversion before ';' token timedRead(void); ^exit status 1 expected unqualified-id before 'void'please help me to resolve this query

Question by nazni  


mp3 frozen what to do?

Plugged mp3 player to usb cord (mtp connected charging) came up on the screen now its frozen wont go back,turn off nothing

Question by sdrgrandma    |  last reply


I mistakenly put the gasoline i used for my weed wacker (Gas and oil) in my mower and it doesnt run very good now.

I have changed the spark plug a couple times and it is pretty dirty with carbon. I even tried carbuerator cleaner . It has no gas filter

Question    |  last reply


Can you run an electric motor off solar panels and in turn produce more electricity than the solar panels can???

I want to know if it is possible to run a one horse power electric motor 120 volt off a solar panel and in turn it runs a generator that would produce enough electricity to make a difference on my bill. The solar calculators say I can only save about $60 a month.... off my 3 to 4 hundred dollar bill. The motors I am talking about is the type used for turning water pumps ... they last for years...   

Question by inquestof    |  last reply


Overheating Car - Causes and Short - Term Solutions

Overheating of the engine not only occurs in the summer, but can also occur in daily driving. In particularly, high-speed running cars, engines, and air-conditioning systems can cause boiling phenomenon when the water temperature is too high. It's dangerous to overheat the engine. It may hard luck that what can damage the engine. When driving on highways at a higher speed, or when climbing a car, if the pointer of the water temperature gauge enters the red zone and stays high, appropriate measures should be taken at this time. Here's how to handle the engine overheating.There are many causes of overheating, including insufficient coolant, cooling fan cooling the coolant has failed, thermostat failure, and coolant temperature sensor failure. If you deal with it improperly, it can lead to an expensive engine failure. Therefore, timely detection and proper disposal of overheating can effectively reduce losses.First, poor engine cooling: Poor engine cooling can cause the water temperature in the tank to be too high. When longer the water tank is used, the more internal scale will build up, resulting in poor heat dissipation in the radiator. The water with too high temperature will not release heat, and it will evolve into a "pan". In addition, the ventilation hole of the radiator is also a common cause of poor heat dissipation. If the external blockage is not ventilated, use a water gun to clean it up. If the inside of the radiator is blocked, then clean it with a cleaning solution. Second, the cooling system is not working properly, resulting in poor heat dissipation. At this time, check the tightness of the fan belt and whether the fan blades are deformed or broken.Third, the thermostat automatically adjusts the amount of water entering in to the radiator according to the temperature of the cooling water, so as to ensure that the engine works within a suitable temperature range, which can play a role in saving energy consumption. If the engine is overheated, check that the thermostat is working properly. Starts at 70°C and fully open at 83°C. When the height of the fully opened valve is not less than 9 mm, the thermostat can be put into the water for heating inspection. If the thermostat can't be opened or the opening degree is not enough, the thermostat needs to be replaced.

Topic by violantez    |  last reply


How does one with no experience learn to work on and fix up cars? Where to start?

I am a girl and I have been interested in fixing cars for a while. Quite a few guys at my school seem to know how to fix cars up, but they had to start somewhere, right? Often, I think peoples' fathers help them out, but my own father knows nothing about cars, nor shows any interest in helping me. If anyone has tips on where I could start, perhaps I could find a shop where people would help me? Or do any car co-ops exist? I know there is such a place for bicycles where I live. Any tips would be great! I am enthusiastic and have some background with fixing bicycles and doing wood and metal projects, so I'm not mechanically clueless. I am mostly interested in old cars, but anything to start would be alright. I have browsed Craigslist for cars and found a few I could afford. On that note, I have a teen's level of funding, so I could find something, but tips on making the best of my money when going about fixing up an old car would also be appreciated (especially considering the cost for parts and such). Any tips on where and how to start are what I am looking fore. Thank you!

Question by toolgal29    |  last reply


Q: do apples with worms ripen earlier?

Hi, maybe i am just hallucinating, or its age, or its the heat, etc... but it seems every years when its about time for the heavens to gift us apples, and me checking the trees, the very first ´ripe´ apples are the one that got worms, or other form of ´damage´. ... is it just me?.... and if not, whats the chemical process behind that. gracias & greetings de los picos de europa

Question by la xerra    |  last reply


Power bank

Hello everyone I recently found a 12v 9a.h battery in my stuff and now i decided to make a portable power bank with it.this is what i am thinking about:i want to make a portable power bank with several voltage outputs for using in car and etc. 1- I want to get a 5v output and use it to charge my devices when I am in a car.2- i want to connect some power led lights so that i have a light bar.3-maybe I also connect an amplifier to it to play music when walking or etc.now that you understood what i want to make these are my problems:1-when the battery slowly drains and the input voltage decreases will the output of the charger module also decrease?2-different devices need different currents for charging for example my tablet needs 2amps while my phone needs 1 amp. do i need to set the output current to any special value?3-what kind of solar panel will be suitable to charge the battery?

Question by Electronic guy    |  last reply


What is the optimal and minimum voltage to charge a 12v 9a,h battery? Answered

What is the optimal and minimum voltage to charge a 12v 9a,h battery?

Question by Electronic guy    |  last reply


Circuit help

Been decades since I did any circuit design and I have a fairly simple need someone will certainly have a simple answer for.I need to run a simple pulse output from a 5 minute timer into a circuit that will have 4 outputs. Each pulse in will cause the next output in line to go HI, with the others all LOW. 5 minutes later, the HI will move to the next Output, with all the others again at LOW. Once the 4th and last output has gone HI, it will wrap around to the first output again, and so on. Sound a bit like a Ring Counter, but there is no CLOCK pulse here. Just a short pulse every 5 minutes or so to the input. Any help would be appreciated. This isn't rocket science, so simple and cheap would be a plus.Thanks.

Question by gjforeman    |  last reply


How to determine what size Audio Potentiometer is needed? Answered

Second attempt to get this question to publish.....sigh... In a small project with approximately (1/4 watt) .25 watt audio output into an 8 ohm speaker, what size Audio (I assume non-linear for audio) Potentiometer should I purchase? I tried a 10k but either I got a Linear (from what I've read) or 10k is too large. When adjusting to volume, I get nothing for most of the turn and then I get all of the volume. I can adjust to the volume I need, but it's very oversenitive. I would like it to gradually adjust the volume. Thanks

Question by keydogstony    |  last reply


Could a 3D printed sealed speaker enclosure printed as separate parts be bonded together well enough to function properly?

I want to try 3D printing a sealed speaker enclosure but the size of enclosure that i need will be 4 times the size of my printers build space so if i divide the enclosure model into quarters what would be my best method of bonding those pieces together into a container that will be mostly airtight once the speakers are in place?

Question by ambientvoid    |  last reply


Normally burn and peel badly

I have pale Irish skin that dont tan and trust me I tried everything to get even a little tan color. So simply you can say I burn and peel badly then pale white again. This year seems different, I was sitting in the shade and i got burnt and it was bad and very noticeable as you can see in the photo, but this time I hardly peeled. in some spots I did but very little which is not normal for me. It turned into a tan, so my question is how is that possible, is it a bad thing that a bad burn didnt peel hardly and juat tanned? Oh and to mention I have been taken this women skin, nails, hair vitamin plan at a place called gnc. Could that be helping me absorb the sun better?

Question by irishangeleyes2012    |  last reply


Ammeter on bluetooth speaker

Hi,I'm building a portable bluetooth speaker and need some help. The speaker is equiped with a TPA3116 amp and is power supplied by a 3s lipo battery. On my construction I would like to attach an analog Weston 301 ammeter in order to check my battery's life. Is it possible? The ammeter can measure 0-15A and the battery is 10A. I made an effort but when I attached it on th battery there was a spark.

Question by VassilisT    |  last reply


Add stereo headphone jack to an exercise bike with hardwired on-board stereo speaker pair

I want to add a stereo headphone jack to an exercise bike with a pair of hard-wired on-board stereo speakers. I imagine each speaker has 2 wires going to it. Is this as easy as taking either or both ground wires and the two signal wires and wiring a 3.5 mm TRS jack? How does a connected headphone typically turn off sound in speakers? How do I handle the two ground wired (one going to each speaker).... can I just use either? or if combining grounds, do these need to be electrically "isolated", if so how?Thanks in advance.

Question by ipaulshapiro    |  last reply


DIY/Open-Source multicamera sensor module build??

I'm trying to figure out how to DIY a multisensor camera similar to "https://www.wired.com/2015/10/light-l16-camera/". Using multiple camera modules to take a picture then stitch them together to create a higher quality photo. I can't seem to find anything close enough except for multiplexing raspberry pi camera modules and I want to stitch the images together. I don't want to be limited to using just raspberry pi in case it's not powerful or fast enough to stitch multiple images into one.

Question by Shawn Nguyen    |  last reply


Why is there no "posted on" date?

Hey in my instructable Smart-Distance-Measuring-Tape-v2, I dont see the "posted on" date. I worked hard on this instructable and it din't get featured, so I commented on the clinic, where Ben Finio informed me about it. I think that may be a glitch and could be the reason why my instructable did not get featured.

Question by ThisIsSteve    |  last reply


Can I change resistance values in laser diode driver circuit to be able to use it with another laser diode?

I have Laser survey units,tens of them, each has IR original laser diode with this specification ((Ith= 17mA, Iop= 31mA, 798nm, Im=1.26mA)). This laser diode is not available any more, I used to use a Sanyo replacement for it DL3144-008S with ((Ith=25mA, Iop=30mA,785nm,Im=2.0mA)). The driver of laser diode is attatched, Iused to change the value of series resistor with photo diode to adjust the output power and it works great. Unfortunately the new LD is also not available now the available one for me is 9GAIA red LD(ADL-65o55TL) with ((Ith=18 to 25 mA,Iop=25 to 35mA,655nm,Im=0.12mA)) the beam is very dim even with current 35mA!!! does it have any relation with monitoring current which is very low in the new one and if it has, if someone can advise me how to change values of the resistance to let the driver work with the new monitoring current, and if it is something else kindly adviseThanks

Question by laserplane    |  last reply


How do I edit my comments? Answered

I want to add a link into a comment I posted. Is this possible?

Question by PatYoungers    |  last reply


Problem removing a glued on bearing from glass

I am a bit stuck and usually this does not happen too often :(Got a lazy Susan with two glass plates and the bearing sitting in two aluminium disks.The thing still works fine but the plates were never really centered properly.Starts to drive me nuts that it is always "wobbling"...My first attempt was to figure out if the glue might just be hot glue, so I gently heated it all up.Was a not go but didn't expect it to be that simple.Next try was to use some clay around the aluminum disk and then fill the dam with acetone to dissolve the glue.It did not even soften it a bit :(To make it complete I also tried it with Methye Ethyl Ketone as it never failed me but it seems the glue used is chemical resistant.In terms of echanic tried with a thin bladed tool but can't get it into the non existing gap between glass and aluminium.And even braided fishing line seems to fail as after about 20 minutes of trying to get in the glue I got nowhere.My last resort would now be to put it in the oven and slowly heat it up until the glue fails.Problem is that I highly doubt the Lazy Susan is meant to tolerate this and that it will crack.There is also the bearing and possible grease to consider as I have no clue yet whether or not I can take the disks apart to get to the bearing.Is there any good idea or tip that I missed that I can try before risking to heat it up?In case you wonder: The disk is about 5mm out of center...

Question by Downunder35m    |  last reply


Control of 25 electromagnets

Hello Everyone, I'm looking for a controller to manage 25 electromagnets. I've managed to come up with a driver circuit to energise each individual electromagnet using an N channel eMOSFET in parrallel with a diode. I need a programmable controller to operate the gate of each eMOSFET but the controller must be capable of managing all 25 switches. thanks for any suggestions in advance.

Question by wameri    |  last reply


The Yacht Race Committee stater/timer/horn

Can I program any sequence? we need 10,9,6,5,3,0. 6 blasts with the push of one button.Please adviseThankspeter

Topic by pietervk88  


Working Wind-Up

I'd like to build a manually operated wind up key( the kind where the key turns slowly) for my costume. One problem; I don't understand the mechanism too well. If you could break down how it works as well as the parts that I would need to create such a device would be greatly appreciated.(P.S. I'm pretty new to this so if you could take that into consideration that would be great too).

Topic by LuckyLanna    |  last reply


How can I figure actual power consumption for my kiln, without buying a wattmeter? Answered

I'm working on some fused glass projects for sale, and I'm trying to figure my kiln's electrical consumption into the price of the items as accurately as possible. I can easily figure the max draw of the kiln, but it's not running full tilt throughout the whole fusing cycle. In fact, through much of the cooldown phases, it hardly comes on at all. I don't want to grossly overestimate and gouge the customers, but I also dont want to underestimate and lose money on the sales. I also don't want to buy a 220v wattmeter that I'll never use again. I don't need super-precise measurements, just reasonably accurate ones. Is there a feasible alternative to a wattmeter for this application?

Question by RavingMadStudios    |  last reply


Arduino NANO error uploading sketch. After attempted loading of NANO clone (ELEGOO) the IDE hangs -

The Com port was selected, old bootloader selected. Various error messages (will collect and add to post here). However the very strange thing is that the NANO is sending to the Serial Monitor at 115200 BPS the message"Loaded next response 1" continuously!OS is Win 10 64 bit - current version with all updates.USB Driver is USB Serial CH-340 version 3.5.2019.1 dated 1/30/2019.This appears to be a new issue that appeared after I attempted to run two instances of the IDE with two NANOs attached. One on COM4 and the other on COM11.I have deleted and reinstalled the driver - same issue.Going to try on another PC.Anyone have any ideas?

Question by Rozzer    |  last reply


Swimjim raspiGuy

Al would like to know how build a raspberry pi drone with 4 propellers with any controller Any help were to look . How do this ?

Question by JamesH458    |  last reply


Crystal walkie talkie range extender? Answered

Hey everybody, I'm modifying some old walkie talkies I have, and I want to extend the range but I'm not sure how to do it, though, because it uses one of those crystal transmitter components to output 49 Mhz. If someone knows how to extend range on radio crystals please let me know! Thanks in advance!!

Question by Adum24    |  last reply


BLE Beacon finder, how to ?

Hi everyone,I am mechanical engineering student and haven't expertise in difficult circuits, so I am here to ask for your helps guys!I am working on a personal project in which i want to create the smallest BLE Bluetooth device possible which could be charged by induction. What i want is just to connect this device to my smartphone.I did some research and i came up with the following components : Qunqi-HM-11-Bluetooth BLE (1.7 V to 3.6 V) Rechargeable Lithium Battery (3V or 3.7 V ) TP4056 Lithium Battery Charger (5V, With micro USB) Wireless Charging Module 5V/300mA (SKU:DFR0363 Brand:DFRobot)So my questions are : Is the TP4056 required to charge with the wirless charging module ? Are those compnents can work together ? Is it possible to make all those components in one PCB by designing it ?Thank you very much,Nabil

Question by dzproject24  


Terrible tragedy. Grant Thompson has passed away.

I don't know how to post this, but maker extraordinaire, Grant Thompson, The King of Random, has passed away from a paragliding accident.I, personally, have learned so much from his wealth of knowledge over the years. A friend showed me a video of his 5 years ago and for years, I remember waiting anxiously for him to post a new video.One of the first people and possibly the most influential people in the online maker community, all around the world. Thank you Grant. Terrible tragedy.RIP.

Topic by Yonatan24    |  last reply


anybody using on demand hydrogen to heat hot water?

Hello all - I am interested in either converting an existing gas-fired hot water heater to burn homemade hydrogen gas, or building an on demand heater powered by same. Is anybody doing this? What are the issues, beyond safety of making your own highly flammable gas? lol... I am thinking jet/hole size on the gas burner ring for efficiency considerations, corrosion issues, etc..... THanks in advance... Matt

Topic by concreteblue    |  last reply


How do i increase the speed of an electric bike?(Motor in hub)

I know you need to increase the power going into the motor. I don't understand exactly how? I know that a different battery with higher voltage output should work, but is there any other way? If so, how and what would I need? I trust that you guys can come up with something. P.S I am aware of the potential danger of the motor if I increase too much.

Question by ClaynEva    |  last reply


I need help identifying a part Answered

Somebody gave me a box full of speakers mids, highs, woofers, and tweeters... In that box also came 2 of these small circuit boards with 2 knobs attached to them... Don't know what they are, and what they use for. Any help will be appreciated

Question by Kingsup310    |  last reply


Portable worksite air conditioner

I want to build an evaporative cooler, that I can take with me to my job sites.My tool brand is Makita, so I want to use a Makita leaf blower mounted to a portable cooler. What I think I need your help with is, the small liquid pump for drawing water out of the cooler and sending to a misting nozzle should be DC, so I can draw power from the Makita blower battery.Suggestions are welcome,Ralph

Question by Manassasralph    |  last reply


Power supply recommendation

I've been trying to collect info and guidance on how to build a portable and minimalistic power supply. I have in the past built other stomp boxes and small amplifiers (PCB kits) but never enough to learn how to read schematics or build from scratch, so I'm looking for something pretty detailed or simple enough. List of the technical and practical requirements: -Steady and safe current output for several hours straight; -Operating voltage: 3-4 to 15-17 volts; -Current: 2-3A; -1 voltage control potentiometer; -1 digital voltmeter; -1 output (1/4 jack); -1 pedal switch input (1/4 jack); -1 status LED; - Possibly external transformer (to keep it smaller and avoid overheating); -No vent holes; I have found similar builds (instuctables and YouTube), but never similar enough to be sure that putting that build in a smaller and sealed box would perform well and not overheat It seems weird to me that I wasn't able to find any kit or project for such a simple build. Below a link to an ideal result example https://thelondontattooconvention.com/suppliers/hard-craft-company-handmade-tattoo-power-supplies/

Question by circuitcircus    |  last reply


Vacuum tube amp help

I just bought a lot of 125 vacuum tubes on ebay for 30 dollars including shipping (the seller didn't list what tubes were there, just said a crate) I got the following (if the same name is listed 2 times in a row, then I got 2): 10JA8 12AD6 12AE6 12AF6 12AU6 12AX4GTA 12BD6 12BE6 12BG6 12C5 12CN5 12CU6 12J8 12K7GT 12RS 12X4 17AX4GT 17BR3 18FW6 18FX6 18FY6 1B3GT 1G3GT 1G3GT 1S4 1S4 1S5 1T4 1U5 1U5 1X2B 21LR8 2BN4 2BN4A 2CW4 2CY5 32ET5 3S4 3S4 3V4 4BQ7A 4BZ6 4BZ7 4BZ7 50B5 5AT8 5AT8 5AT8 5AT8 5BR8 5T8 5T8 5T8 5T8 5U8 5U8 5U8 5U8 654A 6AB4 6AF4A 6AG5 6AG5 6AL5 6AL5 6AM8 6AQ5 6AQ5A 6AS8 6AT6A 6AU6A 6AU6A 6AU6A 6AV6 6AV6 6AX4GTB 6BA6 6BA6 6BA6 6BA6 6BA6 6BE6 6BE6 6BJ6 6BK7B 6BN4A 6BN4A 6BN6 6BQ7A 6BQ7A 6BQ7A 6BQ7A 6BQ7A 6BU8 6BZ7 6BZ7 6BZ7 6BZT 6CB6 6CB6A 6CF6 6CG8A 6CN7 6CY5 6CY7 6CY7 6CY7 6DQ6A 6DQ6B 6EA8 6FM7 6GN8 6H6GT 6J6A 6J6A 6J6A 6S4A 6SA7 6SJ7 6SK7GT 6U8 6U8A 8FQ7 9A8 I'm thinking about making a small amp (below 5 watts) for my ipod, which one of these would be best?

Topic by guyfrom7up    |  last reply


Featured Author: The King of Random

Check out our most recent featured author interview with The King of Random!  Got a question I didn't ask?  Ask it here!

Topic by Danger is my middle name    |  last reply


Tempered glass screen protectors - understand and beware!

I recently had the joy of needing a new screen protector for my mobile after being dumb enough to drop it on gravel. The hard cover took all the impact but the film protector on the screen was scratched badly. Was old and partially worn anyway so I decided to upgrade to a Tempered Glass screen protector. Being somewhere rural I had no chance to get one in a shop so I ordered online. With no intention of advertising for some sellers, I collected a few links so you can check what I am talking about: Item1 Item2 Item3 Item4 Item5 Item6 So, what is my concern with these? They all can be found on amazon and other online services as well as on local markets... As I said I ordered a glass screen protector. If you check these listings and even some of the packing you will notice they all have a thing in common - being shatter proof and of 9H hardness. I also love this video showing how to remove and fix a glass screen protector! The last time I checked glass had one very distinct feature: It is hard and before it really bends it breaks - unless you use fibre optics of fibre glass cloth... What is my concern and warning here? Pretty simple: Stay away from expensive scams! Some claim their screen protector is only 0.25mm thick, even the 0.2mm one I measured was over 0.5mm with the glue... The hardness of 9H refers to the so called Moh's hardness - look it up on Wikipedia if you like. That means these tempered glass protectors would have a similr hardness than a diamond, or at least close to it. Problem is that they are made from plastic to start with and not glass at all. They claims that the screen protector is flexible because it is so thin - again a fake! Even the thinnest tempered glass will shatter if you bend it enough, not so these plastic ones. If you think I am making all this up try to use a really sharp knife or deburring tool and cut the thin sides of one of these protectors. All the ones I tested could be cut quite easy - and I though glass can't be cut with a kinfe... A nice website showing that the scratch resistance is far from the claims can be found here. And a video showing how a real glass screen protector sounds and breaks can be found here. So is it really all bad and should I avoid getting one? Not really if it is only for the added protection. To be clear here, and without the intention to blame any of the above sellers, some protectors actually do have a top layer made from glass and you can hear it as in the above video - it sound solid and not like plastic if you tap it with something hard. Another factor is the simple fact that plastic absorbs impact much better than glass. So where a real glass screen protector might shatter and crack like in the above video, the fake ones might one get a nasty dint or scratch. But you should be aware and clear about what you get and what to expect from it. These glass imitations are made from a strong polycarbonate plastic, similar to the stuff used for bullet and explosion proof "glas" windows - if you every watched the Mythbusters you have seen the big sheets I mean. The top layer of these things is specially treated to repell water, oil and dirt, it also gives the surface the good scratch resistance. The technique is nothing new, camera lenses, plastic sheets and the clear covers you see over the timetable at your bus stop all use it. The new thing is to intentionally mislable a product to make the consumer think it is glass ;) What is the real difference for the user? Check this video. Here a guy performs a drop test with a real glass screen protector. Thing is once the protector breaks the screen itself is broken too but until then it was not too bad. Here it is demonstrated how a real glass screen protector reacts to certain types of abuse - one of the reason I decided on glass. Compared to the plastic counterfeits just the sound on the glass is worth it, but I think the hacksaw was best. Another video from XDA gives a bit more info on how the glass is made - if you can't seeing a phone being abused then don't watch the drop tests at the end ;) Glass with these hardness levels and types of surface protection will give the user a long and worry free use of the phone. The plastic fakes will perform at a similar level for some time but will show signs of wear long before even the top coat of the glass one fails. Both types have their uses and if the fakes would be labeled correctly the user would actually benefit from that. On bigger screens like a tablet I would actually prefer the plastic ones to prevent damage once it needs replacing. On a mobile used in less than perfect conditions I would also go for plastic as it usually is a bit thinner and will fit better within quality hard covers. But when it comes to real abuse like using with dirty fingers most of the time or mostly outdoors where a lot of dust and fine sand can be involved I always go for glass. If you paid attention to the surface treatment then you already realised that the plastic and the glass are in the same region, making them quite scratch resistant. Still fine sand or metal dust will scratch it.... The difference is in the hardness of the actual material that was covered with the oleophobic film. Glass will not give in any way, where plastic is much softer - so not to be confused with the surface hardness! This mean that sharp and point object will easier penetrate the plastic than the glass, something to be considered if you often ecounter harsh use. In terms of actual protection we need to differenciate between surface quality and actual screen damage. After all when badly scratched we can replace the protector but if the display got damaged we are back to square one. The surface hardness was already covered so let's move on to the screen itself. In some of the above videos you can see the abuse a screen might see in normal conditions, and if we would not drop our phones so often repair shops would not be at every corner LOL I have done quite a few screen repairs, mostly for friends and work mates that did not want to pay the hefty extras in a repair shop. From there I got the stories on how it happened and in almost all cases the screen cracked when the phone landed on the corners. In one case the screen and glass protector failed, including the actual display when the phone was dropped out of a 4WD and landed screen first onto a rock. A glass protector will spread the (direct onto the face) impact force onto a much larger area, where a plastic one will produce a dint onto the actual screen much sooner. So again glass wins in terms of actually protecting your expensive screen. But be aware that all this is useless if the phone lands on the corners!! Let me explain: Both the top glass on your screen and the screen protector have a thin layer of "glue". This acts like a shock absorber, so unless an impact goes deep enough so the pressure on the actual screen is too much only the protector should fail. But the screen itself is a tight fit into the frame of the phone, so all side and corner impacts go directly into the glass. As the rest of the glass has no way to give or go the stresses will crack the screen. How should I treat my phone with the new screen protector? Exactly the same way you would without it of course. But if you don't have a proper cover that offers protection of the corners you should invest in one. Having a quality protector and a good case does not mean your phone can be used as a football, see it as an added insurance in case something does go wrong. For obvious reason it can also pay off to have a spare at hand, if something bad happens that requires replacement of the protector you won't be left with an unprotected screen ;) Last but not least, double it up: For people that already know their screen will see a fair bit of abuse in term of scratches it is a good idea to put an extra film protector onto the glass one. Once it is too scratched you peel it off and replace it, while the glass protector gives you the actual protection for your screen. Corning Willow glass As time of wrinting Corning Willow glass is the only "flexible" glass on the market, unless stated with your flexible screen protector you can assume it will be just plastic. I did not list it above as this high tech material is mainly reserved for displays and at least to my knowledge is not available for screen protectors, although I will stand corrected as I have to assume some big players use it for their protectors. The material is actually a sandwich where an ultra thin sheet of glass stis bewteen two layers of durable coating, read it up on their website it is quite interesting. It won't reach the strength of their famous Gorilla glass so without an outer plastic that has the additional oleophobic coating it won't provide the strenght of real tempered glass protectors. Some phones like the Galaxy Round and the fleixble HTC phones use it for example.

Topic by Downunder35m    |  last reply


Traditionally built furniture - maybe as a contest?

I saw a quite old "home improvement" show from the 80's the other day and was stunned to remember how much we gained in ready to use parts and tools these days.A part of the show focussed on a custom made dining table with a matching cupboard/sideboard.The interesting thing here was that no nails or screw were used.Tongue and groove systems, smart notches and such were used instead with just wood glue.I admit the professionals made it look easy to use a hand planer and chisels to carve out some ornaments and details but the result speaks for itself IMHO.We now mainly use power tools, ready to go parts like metal angles, easy screw systems and so on.Wouldn't it be great to have a contest where people actually build wooden furniture, even if it is just a chair, by using traditional tools only?To misuse the term call it "Organic furniture" ;)

Topic by Downunder35m    |  last reply


how to make an inductor?and how much it (uH)? Answered

I want to make a flyback driver, i need inductor 200 uH

Question by Rendydevara    |  last reply


Author Spotlight Interviews: Nominate an author!

We recently began a new round of author spotlight interviews. For the first interview, we chose to reach out and chat with Nikus, who recently won the grand prize in this year's Epilog Contest. You can check out our interview here: Author Spotlight: NikusThese interviews are a great way to learn a little more about individual contributing authors here on Instructables, and see what makes them tick! Is there someone who is an active author that you'd be interested in learning more about? Now's your chance to nominate a fellow author. There are no set requirements to be eligible to be nominated. But generally, we're looking for authors who've shared a good handful of high-quality projects, which made a notable splash within the Instructables community.And yes, if you're feeling bold, you may certainly nominate yourself! : )

Topic by seamster    |  last reply


Can you play Windows PC games on an Xbox 360??

I have an Xbox 360 and I know I can save 360 games to the harddrive and run them.  I was wondering if I could save the Windows PC game to the xbox hard drive and then play it off the harddrive.

Question by arrena    |  last reply