Search results

  1. chopnhack

    Advice on becoming an engineer?

    Thank you gents, great information. I would like to ask more participants to share if they would. How about some of our newer members?? @Nettle Creek UAV , @Ron Paul , @GeekGuy
  2. chopnhack

    Advice on becoming an engineer?

    Hello all, I would like to ask some broad open ended questions to illicit as much constructive conversation as possible. Why did you choose to become an EE? Did you graduate from an ABET accredited school? Do you hold a professional license (PE)? What type of work did you end up doing? Thank...
  3. chopnhack

    struggling to learn basics - 555 timer led flasher

    @messy - here is another very good webpage dedicated to the 555. It is quite in depth but easily understood. http://www.doctronics.co.uk/555.htm
  4. chopnhack

    How can we Improve EP in 2017?

    I agree with your desire for documentation, but there is a real need for a chat area where members can interact in real time to resolve questions on large projects. As I mentioned before, I think if the chat is transcribed - much like the companies that have those chat windows for service calls...
  5. chopnhack

    I need a critical help in designing a magic toy

    Good point, dave. OP - the schematic you included has a microprocessor - that could be used to give your ball the roll on/off signal based on feedback (i.e. distance) from the ball. The transmission and reception would be ongoing at all times, so you would need to make sure you use low powered...
  6. chopnhack

    struggling to learn basics - 555 timer led flasher

    Yes, and its called electron flow theory. It is predominantly used in physics and as far as electronic's are concerned, you can choose to ignore it and use conventional flow so that passive components will make sense, such as the arrow of a diode. Indeed, when you first start out its a vertical...
  7. chopnhack

    How can we Improve EP in 2017?

    Maybe it is only available as a feature of the full adobe acrobat software? It is easy enough to copy and paste. Cataloging the knowledge is another issue! Anybody have an easy way to make all these separate text or pdf files searchable?
  8. chopnhack

    How can we Improve EP in 2017?

    I have been using the feature since XP I believe. I do not think its a Windows feature, but rather the drivers for the printer and PDF support. I have Acrobat full version 8.0 installed so that may have something to do with it as well. I really am going to miss being able to own your software...
  9. chopnhack

    How can we Improve EP in 2017?

    You can do this on PC as well, when print dialog box comes up, switch printer to PDF instead and it saves as such. I think the layout is good. It's broad enough to allow for placement of posts without overwhelming the casual member.
  10. chopnhack

    UV LED PCB Lithography Exposure Unit

    Wow! Really nice job Canobi! :D You put my scrap box to shame here :(:p. Have you used it yet? What was your time of exposure like? I wondered about height as well. I ended up going about 3" distance from LED to pcb. My thought on that was giving enough room for the beams to spread and produce...
  11. chopnhack

    solution of Waveguide selection

    You were given pretty explicit instructions on what was desired. Essentially the teacher is asking you to research and understand the principals of waveguide, selection of spectrum and why, the technology used to 'form' the beam, the potential savings when used correctly,etc. I would approach...
  12. chopnhack

    solution of Waveguide selection

    It would be advisable to detail your problem a bit more to receive useful help. http://www.tvtechnology.com/rf-technology/0146/basics-of-waveguide-selection/262521
  13. chopnhack

    Please help identifying this and advise on how to remove or cover...

    In the colder states they often sell specialized insulation, thin sheets of preformed foam with cutouts for the screw holes for the purpose of insulating drafty electrical openings. Home Depot typically carries them, it may help your situation.
  14. chopnhack

    Question regarding ic / microcontroller chips

    Of course it would matter what is connected to these pins in common. There is a chance to damage the μcu during the change over. As mentioned, programming and logic gates would be key to operating this system. Can you not get everything you need out of one μcu?
  15. chopnhack

    UV LED PCB Lithography Exposure Unit

    I wasn't aware of it at first. Most of the resources I had read stated to expose to UV light and didn't get into specifics. My source for the film was e-bay so no spec sheet. I guess it will be 'determined empirically' LOL
  16. chopnhack

    UV LED PCB Lithography Exposure Unit

    Yes, they have, but the 380 and lower wavelength are still pretty pricey as far as LED's go. The jump is amazing, that is why I went with the 390nm. I hope its not a bad decision!
  17. chopnhack

    How can we Improve EP in 2017?

    That is what I ended up doing, I guess if it ain't broke don't spend any resources there! Maybe a quick FAQ sticky on writing Project Logs then?
  18. chopnhack

    How can we Improve EP in 2017?

    Hi Ian, as I mention in the post, the contents would update an existing thread or create one if it didn't exist. I think it would be very handy for rapid idea exchange, while still being visible to all. Perhaps I am not using it properly, but on the project log page, the update section doesn't...
  19. chopnhack

    Getting from circuits to data.

    Quite a bit. I would suggest this free course if you are interested. I took it and it did a great job covering from logic gates to binary. https://www.edx.org/course/computing-technology-inside-smartphone-cornellx-engri1210x-0
  20. chopnhack

    UV LED PCB Lithography Exposure Unit

    Thanks Steve, keen on knowing what wavelength he will get on with. I will certainly post them, perhaps later this week if I get some time.... found my water tank to be leaking while I was in the shop :mad: - if it leaks it takes precedence!
Top