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12Instructables615,382Views129CommentsOceanside, CAJoined June 10th, 2007

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  • doctek commented on doctek's instructable I2C Bus for ATtiny and ATmega6 weeks ago
    I2C Bus for ATtiny and ATmega

    While I have no experience with the attiny816, a quick Google for info about it tells me that it is different from most of the preceding attinys. As such, many existing libraries don't work for it. Now I have no idea if the I2C stuff in this Instructable will work or not, but you should proceed with care and be prepared to experiment and learn if you want to use this code.The data sheet is your best guide. Read it carefully. There may also be some apps notes that will help. Apps notes are what I got a lot of useful information from.Sorry I can't be of more help.

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  • doctek commented on gzumwalt's instructable Hummingbird6 months ago
    Hummingbird

    Greg, that is really good to know! Perhaps this is just an old wive's tale? I was told this by people at a major copier machine manufacturer who certainly should know, but maybe not. Anyway, I appreciate the feedback.

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  • doctek commented on doctek's instructable Simple Robotics Breadboard6 months ago
    Simple Robotics Breadboard

    Thanks for building this. I hope you enjoy working with it!Could you tell me more what sort of problem you are having? Perhaps I can help you.

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  • doctek commented on gzumwalt's instructable Hummingbird7 months ago
    Hummingbird

    Amazing model! Your attention to detail is wonderful.My only caution is that petroleum jelly is not a suitable lubricant for plastic. Petroleum-based lubricants make the plastic swell. Use a lithium or silicone based lubricant to avoid the problem.

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  • Silhouette Cut Public Lab Mobile Spectrometer

    Yes, if I remember right. I think I was looking in the wrong place. Anyway, I stopped working with it and took another approach. See my stuff on Hack-A-Day.

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  • doctek commented on novelchip's instructable Easy Rubber Machining With a Needle1 year ago
    Easy Rubber Machining With a Needle

    Outstanding work! This is a real enabler for biomedical microfluidics experiments and allows use of materials that can't be cut safely with lasers (like pvc). Plus, it enables those who don't have a laser to begin with.Can't wait to see the devices you'll create with this technique.

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  • doctek commented on GreatScottLab's instructable Make Your Own ESC1 year ago
    Make Your Own ESC

    Perfect. Thanks!

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  • doctek commented on GreatScottLab's instructable Make Your Own ESC1 year ago
    Make Your Own ESC

    Very nice! How about a high res version of the schematic that I could actually read? That would be much appreciated.

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  • doctek commented on doctek's instructable I2C Bus for ATtiny and ATmega1 year ago
    I2C Bus for ATtiny and ATmega

    IMHO, an Instructables author that doesn't respond to comments has only done half the job. So I feel it's important to continue to respond as much as possible. Thanks for your interest!To answer your question, the code for the 2313 should work with the 85 after appropriate pin number changes. Note that the Ram should work with no problems, but larger EEPROMs may require buffer sizes that will eat up all the 85's sram. See the response to the comment below about using Arduino and the 85 as well. Might be a quick way to test feasibility without worrying about details of code conversion.

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  • doctek's instructable Surprise Picture Card's weekly stats: 1 year ago
    • Surprise Picture Card
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  • doctek entered Surprise Picture Card in the Papercraft Contest 2017 contest 1 year ago
  • A Practical Guide to FDM 3D Printing Gears

    Very nice Instructable with lots of good resources! One you left out is one of my favorites: FreeCAD (https://www.freecadweb.org/ ). Has a nice gear generator built in and can be used to create the rest of your machine's design as well.

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  • doctek commented on doctek's instructable Cheap, One Chip Arduino1 year ago
    Cheap, One Chip Arduino

    I assume by your question that you are just starting out. (If not, I apologize.) So I would suggest the Arduino Uno R3. You might consider an experimenter's kit along with it. Google for these. Adafruit is a great source.

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  • doctek commented on doctek's instructable Cheap, One Chip Arduino1 year ago
    Cheap, One Chip Arduino

    Yup. Ya gotta have something to start with. Maybe you can borrow one from a friend? This 'ible is most useful for someone who has an arduino, has developed some apps, and doesn't want to spend the price of an arduino to build a stand-alone version of an app.Could also work for a group that wants all the members to have a cheap arduino to experiment with.

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  • doctek commented on doctek's instructable Build a Dual Extruder for 3D Printing1 year ago
    Build a Dual Extruder for 3D Printing

    I don't use repetier so I can't really help you. Maybe try the RepRap site?

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  • Super Simple Electrocardiogram (ECG) Circuit

    Great 'Ible! I have one question: In Step 8 you say, "Reasons for the deviations will be explained in Step 9."I've read Step 9 closely and don't see any reasons. What am I missing?Thanks.

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  • doctek commented on doctek's instructable Cheap, One Chip Arduino2 years ago
    Cheap, One Chip Arduino

    Thanks for your interest! Please try the latest version (it's 1.6.12 now, I think) and see if it works. I haven't tried using earlier versions, so I can't help you there.

    Great question! To make a truly tiny one-chip Arduino, the tqfp is the way to go. However, the software side should be the same and this Instructable should guide you. But, of course, the hardware side is a different matter. You need to figure out how to get access to the necessary pins so the part can be programmed. Typically, the 6-pin programming header is used for this purpose. Then you need to decide how many I/O pins you want to have access to for your target project or projects. Lots of details to think through, but it's a great learning experience. Go for it!

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  • doctek commented on doctek's instructable I2C Bus for ATtiny and ATmega2 years ago
    I2C Bus for ATtiny and ATmega

    Thanks for your interest in this project! Let's see if I can help you.Note that the ATTINY85 has the same USI as the ATTINY2313, so the code should work with it. What problems are you having and what have you tried?Note that there is now support for the ATTINY85 in Arduino. That might be a simple way to get things going and experiment. Have a look here:http://highlowtech.org/?p=1695HTH!

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  • doctek commented on doctek's instructable Cheap, One Chip Arduino2 years ago
    Cheap, One Chip Arduino

    Thanks for your interest in 328/Duino. Note that you can get 328P chips from the same Chinese sources for a bit less than the Pro Mini. The Pro Mini is nearly twice as wide as the 328P, so might be large for some projects. But as you say, we're rapidly losing our hardware skills to the Chinese. I personally like to be close to the hardware I use and know its strengths and weaknesses. I hope there are others like me. That's who this Instructable is for, after all.

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  • doctek commented on doctek's instructable Cheap, One Chip Arduino2 years ago
    Cheap, One Chip Arduino

    Should say "just as detailed in the figure for Step 3." Sorry.

    Thanks for your interest in 328/Duino! Did you follow the instructions in Step 3 of this Instructable? When I follow those instructions and check the Tools -> Board drop down, I find the ATMEGA328... just as detailed above.

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  • doctek commented on doctek's instructable Build a Dual Extruder for 3D Printing2 years ago
    Build a Dual Extruder for 3D Printing

    Glad my work can help you.Good luck with your project!

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