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  • RFID NFC Tap and Go Ring for Credit Card Payment

    If in a watch band, you could make it out of silicone and zig-zag the wire so it could stretch. And maybe put the electronics so they're on the underside of your wrist so you could just wave over the terminal.

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  • ChipStewart followed jiripraus4 months ago
      • Ever Blooming Mechanical Tulip
      • Arduinoflake - PCB Version
      • Glowing Ornament
  • ChipStewart commented on tallman1996's instructable PVC Instrument1 year ago
    PVC Instrument

    Anyone find a good cheap source for the pipe & fittings online?

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  • How to Make GRBL + CNC V3 Shield Based Mini CNC Machine From Scrap DVD Drive

    Let's try external links . . . Small low res file: https://drive.google.com/file/d/1O0eUgWIM4dq3mY_Dz...Large hi-res file: https://drive.google.com/file/d/1bbaG1mQKr_HlZO5Tw...

    I build one almost exactly like this, then found this Instructable. Only differences were the use of RJ45 jacks for X, Y, & Z axis inputs; and, floppy drive stepper for pen up/down.Unfortunately, I'm still trying to get it to work. The X axis works beautifully, moving strongly and smoothly. The Z is a little weak, but will probably suffice. The Y axis, however, has been a PITA from the beginning! First, it wouldn't do anything, which I fixed by re-soldering the connection and covering with U-cure glue for strength. Then it would twitch a little, but not really move. I was able to adjust the trimmer on the driver to get it to move. It's weak, but at least moves most of the time.Only problem is, it only moves in one direction - regardless of whether I press +Y or -Y! I tried ...

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    I build one almost exactly like this, then found this Instructable. Only differences were the use of RJ45 jacks for X, Y, & Z axis inputs; and, floppy drive stepper for pen up/down.Unfortunately, I'm still trying to get it to work. The X axis works beautifully, moving strongly and smoothly. The Z is a little weak, but will probably suffice. The Y axis, however, has been a PITA from the beginning! First, it wouldn't do anything, which I fixed by re-soldering the connection and covering with U-cure glue for strength. Then it would twitch a little, but not really move. I was able to adjust the trimmer on the driver to get it to move. It's weak, but at least moves most of the time.Only problem is, it only moves in one direction - regardless of whether I press +Y or -Y! I tried another stepper: same result. Switching another A4988 driver board didn't make a difference either. Should I bump up the voltage a little more? I'm at a measured voltage of 12.02V now. If I go higher, will I fry the steppers?Any ideas why? Any suggestions? I've added pics of the front and back, and a video of X, A, and Y movement.Thanks

    Now the X Axis is doing it! I tried using another arduino and another driver. I guess I've fried the steppers.

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  • How to Make GRBL + CNC V3 Shield Based Mini CNC Machine From Scrap DVD Drive

    I made one almost exactly like this one, before seeing this. The physical build went well, using polycarbonate and steel. I used RJ45 jacks to connect the X, Y, and Z axis, so I can switch machines.The x-axis stepper works great - seems good and strong. The z is okay, after I got it to work. The Y, however, has been giving me a hard time. I finally got it working - kind of. At first it would only twitch. By fiddling with the driver trimmer, I got it to turn. Only problem is, it goes the same direction whether I jog +Y or -Y. I tried switching drivers, switching steppers, moving the cables around on the Y stepper outputs. Still, no change.Any ideas?

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  • ChipStewart made the instructable OLED I2c Display With Arduino2 years ago
    OLED I2c Display With Arduino

    I got the code to load and the display to light, but everything seems to be in a narrow band at the top (photo left). After the 128x64 fix, the band got even narrower (photo right). Any idea why?

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  • ChipStewart followed Dennisv153 years ago
  • Acrylic sheet RGB glowing Weather station with indoor/outdoor/forecast using ESP8266

    Okay, I'll shelve the TFT plans . . . for now. I do have the libraries for the display, though. Still, the TFT's are SO much less expensive, and it would be nice to have color - I wonder if any of the color OLED displays would work?I may still pursue the 'lectronics in the base idea, though. I could always use multiple caps in parallel. And since the neopixels touch the base, it seems like you could start / end them there.I wonder if I would be able to add a weather alert feature, in which it would flash and/or activate a small piezo beeper when a local weather alert is issued. Could be a valuable feature.

    Okay, I'll shelve the TFT plans . . . for now. I do have the libraries for the display, though. Still, the TFT's are SO much less expensive, and it would be nice to have color - I wonder if any of the color OLED displays would work?I may still pursue the 'lectronics in the base idea, though. I could always use multiple caps in parallel. And since the neopixels touch the base, it seems like you could start / end them there.

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  • Acrylic sheet RGB glowing Weather station with indoor/outdoor/forecast using ESP8266

    Dennisv15Thanks for such a great project! I've just downloaded everything and have everything I need to build it, except for one thing - instead of an OLED, I have a nice little TFT display I would like to use with UART, I2C, and SPI. I'm fairy new at Arduino programming and ESP's. What would be required to convert the sketch? Would this be do-able, or require a major reworking?I was also thinking of hiding the circuit board in the base and just running very thin wires directly to the display. Any reason this wouldn't work?Also, I'd love to buy a board or two from you. Do you have any left? I'll PayPal you the the money right away.

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