Engineer needed for custom PCB project

Seeking an engineer, experienced in creating files (Eagle .brd or a set of Gerbers) to be sent off to DorkbotPDX. We are looking to modify an existing PCB design for a 24.mmm coin cell battery PCB breakout (similar to http://www.sparkfun.com/products/10495) to work for a smaller coin cell battery. This is a contract position with a budget. Email azellaco@earthlink.net with links to examples of your previous work creating custom PCBs and a brief description of your experience.  Additional details about the project will be provided to qualified candidates. Thank you for your interest. Azellaco New York, NY

Posted by Azellaco 6 years ago


What do you think about Electrochemical Engineering?

Hey there. I been doing some research on degree paths, and the Electrochemical Engineering degree seams relatively new. Not too new, but still, not many places in my country that seem to offer this degree.

Posted by electric_blacksmith 4 years ago


Electrical Engineering Schools

I want to go to a good electrical engineering college. I've been looking at schools like Georgia Tech, and University of Michigan Ann Arbor. I'm leaning toward Georgia Tech, but which college would be the best. My Reach is MIT, considering my scores are high enough. So if I magically get accepted to all electrical engineering colleges, which should I go to?   My potential college list: Boston U Bucknell U Carnegie Mellon U Cornell U Franklin W Olin C En Georgia Tech MIT Miami U Oxford Penn State U Park Polytechnic I of NYU Rensselaer Polytec I Stanford U U Calif Berkeley U Illinois Urbana U Michigan Villanova U Virginia Tech All offer Electrical engineering and rank in the Top 100 based on various US surveys and ranking list for Graduate Education 

Posted by monkhm 7 years ago


Yanosuke Hirai

Here's another one of my occasional notes on Engineers  and engineering ethics. Yanosuke Hirai http://mdn.mainichi.jp/perspectives/pulse/news/20120319p2a00m0na020000c.html Hirai was responsible for insisting on the design of a sea wall which prevented another Japanese reactor being destroyed by the 2011 tsunami, and also for ensuring that, as the sea recedes sharply AFTER a tsunami, that the water intakes were placed so that cooling water could still be maintained.

Posted by steveastrouk 6 years ago


Help ! Auto CAD, Turbo CAD - What's best ??

I need a good CAD program. Have no experience in using CAD, but need something that will aid me in putting up a better wind charger tower (farmer, dependant on off grid power), need also to be able to design meshing gears and perhaps PC board layouts. The internet is so full of advice (read sales pitch) that I am frankly baffled. Come to think of it I also need the earth, but can't afford it. Need advice please

Posted by Karroo Oakey 9 years ago


>_< Specifications... i needz them.

So... about six months ago i moved into  new place.  it's great, but the previous tenants kinda trashed the place.  they left loads of rubbish around and were generally horrible to the house.  The previous tenants did leave a few things that are kinda nifty.  First, they left tons of PVC pipe. i have something like 20 ft of 2 inch pvc pipe, 15 ft of 3/4 inch pvc, and 10 or so feet of 1.25 inch pipe.  the second thing they left was an above ground water filter.  The owner's manual to the pump can be found here online:  http://www.pooltoysource.com/images/pdf/RVR005.pdf This got me to thinking i could setup a little hydroponic rig in my house. I have a hallway window which i'm too cheap to buy a blind for, and letting a bunch of plants cover it over appeals to me.  However, there's some problems.  The owners guide is critically lacking in any sort of technical specifications and all the info on the web just relates back to the pool pump being used as such.  Sooo... if anybody knows anything about what kind of performance can be expected out of this little dandy, let me know. 

Posted by Qcks 6 years ago


Electrical Engineering Project Suggestions

Kindly Suggests Electrical engineering projects for second semester of Undergraduate.

Posted by Ali khann 4 years ago


Biomedical engineering

Hi, My names Tom and I need a team of experienced engineers, biomedical engineers and programmers to try and design different biomedical devices. This will be a NON profitable team, so it would be more of a hobby than a job. But I will take anyone that thinks they will be helpful. Get back to me soon if your interested please, this would also be a great idea for students at universities or collages that want more experience. Thanks Tom

Posted by tommy7243 4 years ago


Getting kids interested in Electrical Engineering program

Getting kids interested in Electrical Engineering I am starting an entry level program for High school students in Electrical engineering. This program is going to be run in the upcoming summer. I believe it is going to be over a course of one month in July. I would like some help from you guys. I am trying to come up with list of topics and activities to cover with them. This is what I have so far. Voltage, Resistance. Explain different components and their functions Have a few activities with the components that I will introduce. So does any one know any topics I should cover and different activities that would supplement the topics.

Posted by DELETED_kclv1988 10 years ago


Engineering Class Suggestions

I'm part of an Engineering Club at my school and we're looking for future projects that just explore some ideas of Engineering in general. We would like to come up with our own ideas at some point, but for now, a lot of us are inexperienced, so I thought I could come here and find some stuff. So far, we have decided to build a bunch of Stirling Engines and use them for miscellaneous things, but after that, we have no other ideas. Could you guys come up with some ideas (possibly your own or ones that you have done), that are similar to this idea of teaching the basics of making things and stuff like that? Links would be helpful. Guidelines: Because we do this at school, there are certain rules that prevent us from bringing large knives and laser pointers on campus. Power tools and exacto knives are OK, though (IKR?). Also, because we are students, we have to scavenge around for materials, so unless it's less than ~30$, we might not be able to do that either.

Posted by jaxter184 5 years ago


Old Engineering Exercise

Hello all! I was just looking through various Maker projects, here and elsewhere, and was reminded of a collage engineering exercise I was told about growing up.  Apparently, they don't do it any more.  My education is only up to an Associates Degree in Drafting and Design, and I never got this at that level. This exercise (near as I can remember) consisted of a student being given a piece of aluminum (I think) and a set of files, a caliper, and a few other small tools.  The student then had to turn the piece of aluminum into as near a perfect cube as they could, using only those tools. Has anyone out there heard of this exercise before?  Maybe done it themselfs? Namely wanted to through this out there, see what people thought.

Posted by ProfCoppersmith 1 year 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?

Posted by guyfrom7up 9 years ago


How to measure distance with a contact microphone?

Hey, I`m trying to create a project about echolocation, so, I´m gonna use contact microphones, give me some ideas mates. PLEASE

Posted by JoséG100 2 years ago


UK internship (no longer) available

Anyone interested in a northern UK based internship ? We are an engineering design company, with many areas of expertise in electronics, software and mechanical design and manufacture, and our current crop of interns are returning whence they came.   We have some amazing projects coming up at the moment which will eventually look great on anyone's CV.  This is an entry level position, for which we will pay expenses only, for a suitable applicant to gain access to our tools and knowledge. We aim to have fun along the way. Internship available for 1 month, 3 months or 6 months, starting Mid-September or later. Steve

Posted by steveastrouk 7 years ago


Job Opening: Instructor & Teaching Assistants for BlueStamp Engineering

About The Program: BlueStamp Engineering is a summer program in New York, NY, Houston, TX, and San Francisco, CA where high school students individually build engineering projects. Students select and build a project of interest (e.g. solar powered electronics, robots, GPS devices, mini wind turbines, etc.)with a motto of "learning by doing". Students go through the entire process of making the devices and support their work with full documentation. Projects have a wide degree of difficulty, from electronics kits customized designs. Please visit our 'Meet The Students' page  to see what previous students have built.  For detailed information about the 2013 program, please visit our 'Info' page. BlueStamp is looking for independent, motivated, kind, and technical people to join our 2013 staff.  We will hire one 'Lead Instructor' and two 'Teaching Assistants' in San Francisco for part-time summer work. Strong performers may be offered the opportunity to take on a more prominent role as the program expands. Position Responsibilities: -All staff will assist students in creating their projects.  This will include teaching engineering techniques and concepts, tools and safety, technical documentation, and troubleshooting methods. Instructors/TA's will guide students to ideas, approaches, and sources of solutions without "just doing it for them". -The Instructor will be responsible for guiding class everyday, ensuring students meet project requirements on time, and supervising the TAs. The instructor will also engage students a month before the program begins, spending 2-8 hours per week over phone/email to help students select a project and order the required parts. -TAs will supplement the instructor's experience in guiding students as all 3 staff members will come from different engineering disciplines. -Where qualified, staff will give lectures and lead discussions regarding topics of student interest (e.g. Alternative Energy, Electronics, Automotives, Entrepreneurship, World Challenges, etc.) Candidate Requirements: -Education and practical experience in one or more of the following three areas: (1) Electronics Hardware, (2) Firmware/Software, (3) Mechanical Design and Drafting. -Extensive experience with building, designing, and troubleshooting devices or prototypes for school, work, or as a hobby. Applicants should be able to showcase and discuss, in depth, any of their projects. -Skilled in troubleshooting problems and using the engineering tools of their discipline. -Experience teaching/leading students (e.g. instructor roles, youth camps, tutoring, mentoring, etc.). -Ability to think and act quickly on a project to identify solutions that can meet goals on a rigid, aggressive schedule. -Desire to share the excitement of designing and engineering with high school students, while motivating students through the challenging and frustrating stages of prototype construction. -Excellent communication skills, unfettered honesty and integrity, and the ability to work with minimal supervision is a must. -Be the type of person that can "Get Things Done" Program Logistics: -Class meets Monday-Friday for 6 weeks for 4 hours per day starting in San Francisco on 6/10, Houston on 6/17, and New York on 6/24 (excluding 4th of July). -TAs will be paid $13 - $16 per hour, Instructors will be paid a stipend of $4,000-$5,000.  All staff are paid as a contractor and are eligible for a significant performance-based bonus. -Each class will be made of 10-12 motivated students who have passed a rigorous application process. -All staff must pass a background check. To Apply: Submit a resume to our 'Contact Us' page.

Posted by dyoung41 5 years ago


Fun (Techie) Question(s)...(will be continued if there is interest) This is #1:

Engineering problem: The problem is to take an extension cord (you will have to figure the gauge at some point), and wire in 2 more "sockets" (for plugs) in series or in parallel, plus 3 neon bulbs in such a way that they only light when something is...#1: plugged into the corresponding socket &#2: the something (appliance, light, etc) is turned on, in other words, when that portion of the circuit is closed. The cord will be for very light rated appliances or bulbs. Nothing beyond a kilowatt althogether. Specify extension cord wire gauge and anything else needed for the project and it's necessary rating / part number. And most of all, have fun....and don't over think the problem ;-) OK, I blew it.....I knew I had created a similar cord to the one I described, and finally found it....only it doesn't do what I said it does. I merely had Neons that come on when the cord is plugged in.......this is what happens to your memory as you get older LOL.

Posted by Goodhart 10 years ago


3D Modeling Program?

I have some ideas for a project I want to build, but I'd let to sketch it out in 3D form and create a model. Are there programs that can do this? I'd prefer free ones, but I guess I can shell out a few bucks if needed. I basically just need somewhere to put my thoughts into a 3D design so I can view what I'm actually building.

Posted by freethetech 7 years ago


Using "Phun" to simulate mechanisms

I'm not an engineer, and don't have access to Autodesk / AutoCAD, so I've been using Phun to simulate mechanical design.It's not strictly valid in an engineering sense, but it works pretty well for roughing out ideas. The polygons were created in Inkscape, then converted to Phun scenes with SVG2Phun. Some objects won't translate (like grouped objects), so it's necessary to simplify (hence the two images from Inkscape.)

Posted by gmoon 9 years ago


Which 3d modeling and engineering program

Hello all, I am new to 3d modeling and printing. Before I go and buy or build a 3d printer I would like to start 3d modeling. Out there is chaos. I mean there are over 15 programs that do 3d modeling. Each  friend I ask he uses a different one. So I need some help. Here are the requirements: 1)Software must be good for 3d printing 2)I don't care if it is hard to learn (if the results are good and the possibilities are endless) 3)Must be  also engineering  compatible (e.g I would like to build a suspension, or apply heat to a model and see what happens,  or apply pressure at a specific  point and see what happens) 4)Cost is not a problem,because my boss is paying 5)I have windows 7 64bit 4GB ram Thank you all

Posted by DJman230 3 years ago


Thermodynamics for Highschool

So, I work at a science center and we have our annual Engineering Olympics coming up and we've been brainstorming something about thermodynamics. The general format is 6 teams from different highschools in the area are given a task to complete from one engineering discipline, such as construct windmill blades to achieve the highest amperage from an attatched motor or insullate a container of water with random materials to prevent it heating up when submerged in boiling water. This year, I haven't really found an idea for thermo that really excites me. Thermo isn't the easiest thing in the world in highschool, and since we're dealing with kids from different schools, we have no way of knowing how advanced they are. So, any ideas of a project to test their thermodynamic mettle?

Posted by Dinkum Thinkum 9 years ago


School course of study?

Hello everyone, I am not sure if this is the right place to post this or not, but I am looking into going back to school. I would like to be in an industry where I can learn how to make things like robots, and electric cars etc.. I am sure these things will require more then just a basic degree but I would like to get started in the right path. The problem I have is, would these fall under mechanical engineering or would if be electrical engineering? I like the idea of building something from concept to final design where I learn the hardware as well as the programming skills to make the device do what I want it to do. So can someone tell me what course of study would be best? Thanks, Jester

Posted by Jester_boy2 8 years ago


need help with joining 6 speakers

Hi~ I currently need help in knowing how to attach 4 speakers and 2 subwoofer together while making sure it's portable. It also needs a mic jack plus a plug to be able to plug to a mp3 player or a smart phone. I think it needs to be powered by batteries as well? It's for a cosplay costume i am doing that have speaker attached to it and since the costume will have my mouth covered by a mask, i decided i could actually make good use of the speakers to talk to people with a small mic hidden under the mask. But the thing is that i have totally no idea on how to do it, i have found some tutorials but it doesn't seem to match what i am planning to do. It would be nice if anyone is kind enough to help me with this problem. Thanks :) Here is the image of the cosplay i'm planning to do:

Posted by sakura_rin 4 years ago


Is anyone skilled in metallurgical engineering?

*Yes, I know, another question involving college and my future life.*I am kind of split between mechanical engineer and metallurgical engineer. They both have some great benefits and trades that I'd love to go into, but it's difficult deciding which would be better for me.I do aspire, no matter what field I go into, to weld and do other metalworking, although I don't just want to weld for people. I know it sounds weird, but I like to take the time to know about what I am working on, and not work at "face value", if you will.So, any mechanical or metallurgical engineers who want to try to sway me one way or another, please do so now. ;-) Thanks,Bran.

Posted by Bran 10 years ago


potato cannon engineering survey

Hey, I need help from people who have built or bought potato cannons. my capstone high school senior engineering project is centered around building a better potato cannon, and part of the project is doing some market research. I've got a quick (10 question) survey that's built to just get an idea of problems with current potato cannons, the kind of demographic that generally uses them, etc. Please help with this project. I'll probably post instructions on making it here when we're done. here's the link to the survey. http://www.surveymonkey.com/s/PTNSBJW thanks if you can help.

Posted by codongolev 6 years ago


For All the Concrete Enthusiasts at Instructables

Dr Purnell is actively seeking other researchers, engineers, scientists, designers or even sculptors and artists who also have ideas for new uses for cement.I'm not sure if anyone is interested or if someone in the community previously posted this, but I thought I might throw this out to the ingenious and innovative Instructables community. I thought some of you all might be interested.Main Page / Network Link:http://www.engineering.leeds.ac.uk/resilience/research/NACNetCementingtheFuture.shtmlLeeds engineers developing bullet proof vests from cementhttp://www.leeds.ac.uk/media/press_releases/current09/bullet.htmMight be a good way for interested Instructables folk to continue contributing on a global scale and to showcase the open-source power of the Instructables community. Plus, it might help you out if you're younger and/or looking for undergrad or graduate level resume boosting aspects for design and/or engineering programs.

Posted by MolecularMaestro 8 years ago


Electrical / Electronics Engineering Position in Chicago - RAW THRILLS

Hi everyone, We have one of the ultimate electronics positions available. We make coin-op arcade games and constantly innovate our electronics to differentiate our games from the home consoles. We're looking for someone that can hack innovative technology and make it work in our market. Official job posting is below. Please check out www.rawthrills.com for more information about our company! JOB INQUIRIES SHOULD BE SENT TO jobs@rawthrills.com. Please include a resume and an explanation of your qualifications and interest. ====================================== Available Position: Highly Motivated, Entry Level Electrical or Computer Engineer Raw Thrills, Inc. - February 2010 Raw Thrills, the leading US manufacturer of coin-operated video games, is looking for an enthusiastic Electrical or Computer engineer to join our Electronics Engineering design team. You will be working as an efficient member of a small team on products that continue to gain domestic and international market-share. Immediately, you will contribute to the design and verification of electronics, firmware, and software. In addition to the internal team, you will work with partner engineering companies to develop & maintain products, and interact with contract manufacturers to troubleshoot issues on-the-fly as they arise on the production line. You will collaborate with several experienced engineers and programmers, all the while working independently most of the work day. At Raw Thrills, our arcade games are designed entirely in-house, from the ground up. They are composed of custom mechanical parts (wood cabinet, plastics, metals, etc.), an off-the-shelf PC, a monitor, custom wiring, custom electronics & interface devices, and custom game software. As part of the Electronics Engineering team, you will be involved in much of the arcade game’s design, from low-level circuitry to high level software, and everything in between: * ESD testing & EM compliance * Custom circuit & firmware design * System integration & validation (peripherals ↔ PC ↔ API ↔ software) * Operating System (Windows Embedded) maintenance * Device driver & device-application interface (API) programming * Device functional & longevity test design (including GUI PC software, firmware, and mechanical construction) * Coordination between mechanical and electronics design * and more! Required Skills: * Demonstrable working knowledge of C/C++: need examples of work and debugging proficiency * Solid understanding of digital circuit design & troubleshooting digital systems (from circuit to PC software) * Experience designing & implementing a digital system from the ground up (school project, internship, etc.) * FPGA (VHDL or Verilog) and/or MCU (c or asm) programming competency * Self-sufficient and motivated to independently learn * Proficient with standard bench tools: soldering iron, oscilloscope, DMM, etc. Bonus Skills: * Programming experience with PC↔device communication: USB, RS232, LPT, etc. * Schematic capture and PCB layout experience * GUI programming experience (Win32 or Linux) * Active knowledge of Linux / home Linux user * Working knowledge of common scripting languages (Python, bash, Windows batch, etc.) Example Projects: * Design low-cost circuitry to robustly control addressable LEDs for eye-popping lighting effects * Design, implement, and perform game system latency testing (create hardware/software as needed) o EX: What is the round trip time from button-press to in-game feedback? Where are the bottlenecks? * Design hardware diagnostic software to allow automatic system diagnosis by end-user * Design automated functional test software for completed PCB assemblies * Design circuit and layout PCB for contact-less sensor module o Determine and perform validation testing * Add interface firmware features (i2c, Dallas 1-Wire, etc.) to MCU based board and update PC API so that game programmers can leverage the new features

Posted by rawthrills 7 years ago


The site you haven't visited yet (but probably should have)

Okay, maybe you have visited before.  But it's still worth going back.   Check out AfriGadget : http://www.afrigadget.com/ They bill themselves as "solving everyday problems with African ingenuity".  If necessity is the mother of invention, it's original home is Africa.  For the rest of us in the world who are far from Africa, they may be encountering problems we've never considered, and are solving them with limited tools and materials in very unique ways.  For example, go check out Richard's "Lion Lights".  There's a problem you won't encounter in Wisconsin (in my case), but the creativity is undeniable.  I've bookmarked it.

Posted by Kozz 6 years ago


Building a custom shaped Compressed air tank

Hello, am looking into the possibility of building my own paintball markers, and wanted to do a custom way of using the air system, compared to most markers. I was thinking either a square shape, but after finding an article that was talking about water and gases tanks and why they are build cylindrical, i realized that maybe that might not be as easy or practical. another possible idea would be a flask shaped tank, but for the design am looking at it would need special commendations, none the less I wish to see if something like that could be possible.

Posted by Mac yet more irish 1 year ago


Internship Search

Hello, I am in search of companies that offer internships to high school graduates going into college as a way to gain experience. The problem is that companies I want to intern for all want (Idaho Power, Union Pacific Railroad) college experience and previous college education in that field. I am primarily interested in the industry side of things, because I want to see how things work and experience them myself. The industry is considered “dangerous” so therefore I have not been able to find any companies willing to offer internships to high school graduates. I really don’t care about pay, because I am only interested in education as of right now and this would be very valuable. I would prefer local companies, but I would be willing to go out of state. What I really want to know is: How can I convince companies to let me shadow an employee or be an unofficial intern? Do you need documentation from companies that you interned with them when writing college resumes? What sort of companies would be interesting (Idaho Power, Union Pacific, Norco, etc.)? Anything else you may be able to suggest. Thanks!

Posted by tinstructable 6 years ago


Renegade Teenage Engineers

Now this is a collaboration.

Posted by fungus amungus 10 years ago


jet engines

Hey! i want to built a gas jet engine without the turbocharger! can u help me with combustion chamber and inside shaft ! and one more question! how to convert the power of a jet engine in speed!?

Posted by hreashi 8 years ago


lego steam engine

Enginethis isnt my site but here are instructions for a lego steam engine

Posted by nick.z 11 years ago


Steam engine model made entirely with glass!

Here is a beautiful model of a steam engine made with glass.

Posted by blkhawk 4 years ago


A cheap gas turbine jet engine.

Where can I find a cheap priced rc or small gas turbine jet engine?

Posted by koolsk8ter111 10 years ago


Artificial Intelligence VS Mechanical Engineering

This year I'll choose a study, and I'm still hesitating between Artificial Intelligence and Mechanical Engineering. Which one do you think is the best choice, and why?

Posted by merijnvw 9 years ago


Pocket Jet Engine

Where can I find The metal pen barrel and parts, for the pocket jet engine?

Posted by koolsk8ter111 10 years ago


What kind of relay do I need?

How do I find out which kind of relay switch I need for my alarm clock project (connecting an alarm clock to a motorized water gun). What information do you need? Thanks.

Posted by hthnc-student 5 years ago


Year 12 System Engineering final project idea

Hey guys! i am in need of your help For my year 12 Systems Engineering class we are required to make a electronics project, which will account for 90% of our grade. only problem is i am stuck for ideas. in previous years, enteries have been things such as: RC boats, Home made vehicles, model functioning elevator, rc helicopter, arcade machines (which i did like very much :D), air hockey and even miniature rocket launching pads ect.  any ideas will help, if there is a link on instructables that would be even better :D note: my teacher gets off over things with sensors so if the project has them it might help, but personally i couldnt care less.

Posted by malt3z 6 years ago


Looking for a cheap and easy project for a beginner

Hi :) Next year, I'm planning on starting a Mechanical Engineering degree. I want to get some hands on experience with making stuff just as preparation, but I've never done anything like this. What's a good place to start? And something that won't cost a lot as I don't have much money? Any help is appreciated :D thanks

Posted by mheywood 5 years ago


Something of interest for kids who have an interest in inventing and outer space.

NASA is holding a sort of contest for kids in grades K-12 to design a specifically-sized 3D-printable device that astronauts can use in the International Space Station. I figured it may be of interest to people here. I would participate myself but I am just a little over the maximum grade threshold. Info here. Good luck! -Nerfrocketeer

Posted by nerfrocketeer 2 years ago


Need Project Ideas for 4-H SET

Hi, I am a third year project volunteer with 4-H and looking for ideas on what our next years project theme should be, So far in year one we did robotics (vibrating bots, BEAM, Legos, and underwater ROVs). In year two we did mechanical devices (solar cars, catapults and compressed air rockets). Any unique ideas for our 7-12 year old age group is encouraged. Info on our activities are here.

Posted by phatguppy 7 years ago


Cheap Jet Engine.

What Jet engine can I build for $50-$200 in price? And that is small? it could be any type of jet engine, I just want to start building one.

Posted by koolsk8ter111 9 years ago


The Memristor - they've found it!

This came out quite a few days ago, but I haven't seen it until today.HP's Henry Williams and his group have accidentally stumbled upon the fourth fundamental element in electronics - the memory resistor, or memristor. Basically, it's a resistor that changes its resistance with elapsed current flow, or total amount of charge that has passed through it, and retains its resistance even after current ceases to flow through it. From the article:"The classic analogy for a resistor is a pipe through which water (electricity) runs. The width of the pipe is analogous to the resistance of the flow of current—the narrower the pipe, the greater the resistance. Normal resistors have an unchanging pipe size. A memristor, on the other hand, changes with the amount of water that gets pushed through. If you push water through the pipe in one direction, the pipe gets larger (less resistive). If you push the water in the other direction, the pipe gets smaller (more resistive). And the memristor remembers. When the water flow is turned off, the pipe size does not change.Such a mechanism could technically be replicated using transistors and capacitors, but, Williams says, “it takes a lot of transistors and capacitors to do the job of a single memristor.”The memristor's memory has consequences: the reason computers have to be rebooted every time they are turned on is that their logic circuits are incapable of holding their bits after the power is shut off. But because a memristor can remember voltages, a memristor-driven computer would arguably never need a reboot. “You could leave all your Word files and spreadsheets open, turn off your computer, and go get a cup of coffee or go on vacation for two weeks,” says Williams. “When you come back, you turn on your computer and everything is instantly on the screen exactly the way you left it. "Apparently, evidence of memristors has been around for quite a while, but it was only until now, during the age of nano-technological exploration, that we finally have labeled the "strange voltages" we've found in experimental circuits as a result of memristor behavior. The discovery was made while doping Titanium dioxide with some dopant that the article fails to cover. Anyhow, the resistance of TiO2 changes with the amount of dopant covering it. Since the dopant does not adhere perfectly to the TiO2 substrate, the flow of charges (electrons) can move the dopant, and cause it to cover more or less of the substrate, thus changing its resistance. "Williams found an ideal memristor in titanium dioxide—the stuff of white paint and sunscreen. Like silicon, titanium dioxide (TiO2) is a semiconductor, and in its pure state it is highly resistive. However, it can be doped with other elements to make it very conductive. In TiO2, the dopants don't stay stationary in a high electric field; they tend to drift in the direction of the current. Such mobility is poison to a transistor, but it turns out that's exactly what makes a memristor work. Putting a bias voltage across a thin film of TiO2 semiconductor that has dopants only on one side causes them to move into the pure TiO2 on the other side and thus lowers the resistance. Running current in the other direction will then push the dopants back into place, increasing the TiO2's resistance.HP Labs is now working out how to manufacture memristors from TiO2 and other materials and figuring out the physics behind them. They also have a circuit group working out how to integrate memristors and silicon circuits on the same chip. The HP group has a hybrid silicon CMOS memristor chip “sitting on a chip tester in our lab right now,” says Williams."I think this is pretty awesome, considering the current breakthroughs in nanotechnology and downsizing of transistors, memristors would enable a whole new field to be born, and circuit theory may have to be re-designed.Like Leon Chua said, the man who first came up with the idea of a memristor, "now all the EE textbooks need to be changed."These next few years in the field of EE should be very interesting =)Image from Spectrum Online

Posted by T3h_Muffinator 10 years ago


Mechanical Engineering Assistance

I am a mechanical engineer and solidworks expert with over 10 years experience in new product design and development. I offer services for hire and free advice when I'm available. Feel free to contact me for advice or assistance.

Posted by lymanjbishop 5 years ago


Propulsion Engineer

I want to design new propulsion systems that don't need to use combustion, what should I major in, I was thinking of majoring  in Aerospace engineering and minoring in Electrical engineering. Any suggestions? p.s. the propulsion includes, but is not limited to: anti-gravity/warp-drives  (Which physics says is plausible)

Posted by monkhm 7 years ago


Honda NSR 500 engine

Hi i am looking to build a race bike and i want to use a Honda nsr 500 V4 engine for its pure power but i am having hard times finding that engine can someone help me please? Thankyou Darren

Posted by dazzer730 7 years ago


Knex hi-torque(?) engine idea

Right, i've just had a brainstorm what if you made a knex engine to power a gun, here is an picture of it, unfortunatly its in paint but ive just thought of it.

Posted by CrazyCHRIS!! 9 years ago


motorbike engine tuning

Just download and start reading

Posted by axeman.99 4 years ago


stirling engine

This is just my burning question for anyone who has mad skills in engineering. how do I build a small stirling engine generator for home use to run off a non-combustion heat source ie solar panels?

Posted by djsc 10 years ago


Interview: the man who makes the smallest engines.

I lone this guy's work - tiny, working, hand made models of IC engines - but I love his attitude even more...

Posted by Kiteman 6 years ago