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5Instructables41,237Views30CommentsJoined August 15th, 2011

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  • dcolemans commented on Junophor's instructable UV-Fluorescence Steampunk Lamp2 days ago
    UV-Fluorescence Steampunk Lamp

    Very cool project. I love all things Steampunk. Nicely done.

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  • dcolemans commented on dcolemans's instructable DIY Submersible ROV26 days ago
    DIY Submersible ROV

    I used them straight from Thingiverse https://www.thingiverse.com/thing:639240. This link looks suspect here so within Thingiverse just query SOAR Propeller and pick the three bladed one.

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  • dcolemans commented on 271828-'s instructable Brushless Gimbal Balancing Robot4 weeks ago
    Brushless Gimbal Balancing Robot

    I was working on it when the smoke came out. I was struggling with using I2c to communicate from the OpenMV camera to the Arduino.

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  • dcolemans's entry Pirate Ship Tree House is a winner in the Tiny Home Contest contest 5 weeks ago
  • dcolemans's entry Pirate Ship Tree House is a finalist in the Tiny Home Contest contest 6 weeks ago
  • Arduino Robotic Bartender - 3D Printable & Bluetooth

    Very cool and well documented project. I attempted an automated bartender in 2014 but was only partly successful. My intent was to have a portable setup, all built into a suitcase, and with a steampunk flair. I used pumps and a scale to regulate how much liquid to pour. The scale was the problem area since it was vulnerable to moisture. Here's a pic.

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  • dcolemans commented on dcolemans's instructable Pirate Ship Tree House2 months ago
    Pirate Ship Tree House

    I didn't look that hard at what the restrictions might be and never asked (forgiveness being easier than permission). But I did know that it had to be under xx square feet. I never heard from anyone official. Fortunately the neighbors who live closest also have kids, and I interacted with them some during the build process. Their kids came over and tried it out, etc.

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  • dcolemans commented on dcolemans's instructable DIY Submersible ROV2 months ago
    DIY Submersible ROV

    Just saw your question...The depth sensor is connected via SPI. I found the code somewhere, and it's all in depthSensor.ino tab.Hope that helps.

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  • dcolemans's instructable Pirate Ship Tree House's weekly stats: 2 months ago
    • Pirate Ship Tree House
      11,601 views
      128 favorites
      29 comments
  • dcolemans commented on 271828-'s instructable Brushless Gimbal Balancing Robot2 months ago
    Brushless Gimbal Balancing Robot

    Very nice project and very cool design. I learned a lot following in your footsteps, in particular use of the timer interrupt to get more precise timing. It's amazing what you made the little gimbal controller do! I have a link to a video of mine in the I Made It section.

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  • dcolemans made the instructable Brushless Gimbal Balancing Robot2 months ago
    Brushless Gimbal Balancing Robot

    https://youtu.be/WdgefVsIm0w I hope the video works here since I don't have any pics of the thing.

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  • dcolemans made the instructable Brushless Gimbal Balancing Robot2 months ago
    Brushless Gimbal Balancing Robot

    Very cool design. Amazing what you can put into one little gimbal controller board. I added an OpenMV camera on top in hopes of getting it to autonomously follow a line. I was struggling trying to get the camera to talk to the Arduino via I2C when the board burned out. So here it is as far as I got.

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  • dcolemans commented on dcolemans's instructable Pirate Ship Tree House2 months ago
    Pirate Ship Tree House

    That's why they invented grandkids - even step-grandkids. You could build one on spec. (a treehouse, not a grandkid).

    It's been over a year and the trees seem fine. It's the treehouse that's eventually going to be torn apart by the trees growing.

    Yes. One inch diameter of course. Needed special order. They don't stock these at the local hardware store.

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  • dcolemans entered Pirate Ship Tree House in the Tiny Home Contest contest 2 months ago
  • dcolemans's entry DIY Submersible ROV is a winner in the Make it Move Contest contest 4 months ago
  • dcolemans's entry DIY Submersible ROV is a finalist in the Make it Move Contest contest 4 months ago
  • dcolemans commented on dcolemans's instructable DIY Submersible ROV5 months ago
    DIY Submersible ROV

    I think that the need to recalibrate at power up is the nature of the beast. My mobile phone compass also requires moving it around to calibrate when the app is brought up. I read somewhere that this is normal and perhaps unavoidable. After I power up (connect the battery) I just dangle my sub and turn in 360 before putting it in the water. But I can see that for a ground based rover it would be awkward, more awkward for a big one.For the non-automatic 9 axis compasses, I have seen code that does a calibration at the beginning. I've not been successful with that. Good luck.

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  • dcolemans's instructable DIY Submersible ROV's weekly stats: 5 months ago
    • DIY Submersible ROV
      2,380 views
      74 favorites
      19 comments
  • dcolemans commented on DIYunderwater's instructable ROV Quard Patrol System5 months ago
    ROV Quard Patrol System

    Thank you for the response. Wi-Fi enabled by temporary connection between ROV and wire to the surface has got me thinking...

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  • dcolemans's instructable Gas Heated Hot Tub's weekly stats: 5 months ago
    • Gas Heated Hot Tub
      45 views
      0 favorites
      0 comments
  • dcolemans commented on dcolemans's instructable DIY Submersible ROV5 months ago
    DIY Submersible ROV

    For the acrylic dome, do a search in Amazon for Acrylic Dome 4". It was $12.99.Re. the RC, the receiver I use is one that has a separate PPM output. You have to look for that when you buy a receiver. To decode the PPM signal, there's pretty good discussion in Instructables here https://www.instructables.com/id/Reading-RC-Receiv... And many other sources if you Google "decoding PPM with Arduino". The only extra trick I needed was that stray erroneous signals would come in and cause the thrusters to twitch and spasm. The prefect solution was to use a Median Filter https://github.com/daPhoosa/MedianFilter to get rid of the extra high and extra low values. The filter takes the last 5 (in my case) readings, sorts them in value sequence, and gives you the center readin...

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    For the acrylic dome, do a search in Amazon for Acrylic Dome 4". It was $12.99.Re. the RC, the receiver I use is one that has a separate PPM output. You have to look for that when you buy a receiver. To decode the PPM signal, there's pretty good discussion in Instructables here https://www.instructables.com/id/Reading-RC-Receiv... And many other sources if you Google "decoding PPM with Arduino". The only extra trick I needed was that stray erroneous signals would come in and cause the thrusters to twitch and spasm. The prefect solution was to use a Median Filter https://github.com/daPhoosa/MedianFilter to get rid of the extra high and extra low values. The filter takes the last 5 (in my case) readings, sorts them in value sequence, and gives you the center reading. Hope this helps.

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  • dcolemans commented on Tustin High T-Tech's instructable First Person View RC Car5 months ago
    First Person View  RC Car

    Very cool project! Makes me want to do a VR goggle FPV project.

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  • dcolemans commented on DIYunderwater's instructable ROV Quard Patrol System5 months ago
    ROV Quard Patrol System

    Very interesting project. The induction charging and autonomous patrolling are impressive. Several questions though:Can you provide a few more details about how the wifi signal goes via "metal guide rings" and how this retrieves the video recording and allows re-programming the Arduino? Where does the video go after it "comes up" via wifi. Does someone manually scan 24 hours of recording to look for damage?What is the status of the project?

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  • dcolemans commented on dcolemans's instructable DIY Submersible ROV5 months ago
    DIY Submersible ROV

    Good old Amazon, where two day shipping has made me an impatient person. Here's the link to the 500 GPH cartridge https://www.amazon.com/gp/product/B001446X1Q/ref=o... If the link doesn't work, just search for Johnson Marine Pump Cartridge. BTW, the 500 GPH has the same dimensions as the 1000 GPH. I guess "cheap" is relative - compared to ready to go thrusters.

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  • dcolemans made the instructable DIY Submersible ROV5 months ago
    DIY Submersible ROV

    I see where you are headed with the mesh bag. Other folks have used wine corks for tether floats, but hey, we lucky folks with 3D printers... Good idea about hollow forms. Clip on would be better. They could be pretty skinny with thin plastic. Make a hole and shoot in some foam as you say. Float in pic is 30mm long.

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  • dcolemans commented on dcolemans's instructable DIY Submersible ROV5 months ago
    DIY Submersible ROV

    Thanks.

    It's a 10 Amp/Hr battery. Just observing the Ammeter, it draws 2 to 4 Amps only when it's pushing hard one direction or another. So based on the assumption one is not constantly travelling, it would only be drawing an average of 1 Amp, it should last several hours, say 5, taking it to 50%. That sounds optimistic though huh? Just playing around with it in the pool etc, the battery never seems to go down much. The voltage shown on the pics of the screen is not valid, not calibrated right.

    Re.filling the pipes with silicone: Why not just let it flood with water?You're right about risking the cable getting nicked. I hope it's well enough protected with the rope. The depth meter wires are individually potted but not the tether cable.You're right about the tether drooping down to the lake floor. If it all works well, I may try a longer tether at which time I'll try for positive buoyancy (maybe a larger poly rope). I've also read where folks have used cork floats strung along the tether, but that sounds like a mess. I'm not clear about how the light mesh bag approach would work... Would it uncoil as needed, coming out of the bag? Or is the bag more of a long sleeve?Re. salt water conductivity: It would be an easy experiment to dip a couple of terminals and see how cl...

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    Re.filling the pipes with silicone: Why not just let it flood with water?You're right about risking the cable getting nicked. I hope it's well enough protected with the rope. The depth meter wires are individually potted but not the tether cable.You're right about the tether drooping down to the lake floor. If it all works well, I may try a longer tether at which time I'll try for positive buoyancy (maybe a larger poly rope). I've also read where folks have used cork floats strung along the tether, but that sounds like a mess. I'm not clear about how the light mesh bag approach would work... Would it uncoil as needed, coming out of the bag? Or is the bag more of a long sleeve?Re. salt water conductivity: It would be an easy experiment to dip a couple of terminals and see how close they can get before they short out. My battery terminals are a good 2 inches apart. And maybe one could coat it all with waterproof goop. Then you'd need a reed switch inside the dry tube and a magnet on the outside.

    Thank you.

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  • dcolemans entered DIY Submersible ROV in the Make it Move Contest contest 5 months ago
  • dcolemans commented on dcolemans's instructable DIY Submersible ROV5 months ago
    DIY Submersible ROV

    Right now it's limited by the 50 foot tether. I've only had it to swimming pool depth so far. I don't know how much pressure it will withstand before it leaks. I think the seal around the acrylic dome is weakest point. The potting around the holes seems secure and the rubber hub-less connectors seem secure too.

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  • dcolemans commented on joesinstructables's instructable Snake Robot1 year ago
    Snake Robot

    Thanks for the reply. I guess I'll do some experimenting as soon as I can get the snake untethered (electronics and batteries onboard). I do want it to go as quickly as it can.

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  • dcolemans commented on joesinstructables's instructable Snake Robot1 year ago
    Snake Robot

    Very cool project. I am making a robot snake with 3d printed parts and am using your neat math for the serpentine motion. Question though, if you have a 12 segment snake (12 servos), why did you calculate angle of lag between segments using 11 as the divisor? I plan to increase my current 12 to 16 segments. Should I divide 2Pi by 15?

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  • dcolemans made the instructable Solar System Orrery (3D Printed)1 year ago
    Solar System Orrery (3D Printed)

    I did make it, but gave up trying to get the moon to go around. It's a wonderful design, quite thorough and well documented. I did enlarge the x&y dimensions of the gear arms by 1.5%. Also there was a bit too much reliance on superglue so I used set-screws to secure the gear arms and the body to the center shaft (threaded into the plastic). To mount the slip ring, I replaced the motor driven gear with a gear with riser and flange. Also I got fancy for Earth and used a beautiful little painted marble I bought on Ebay.

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  • dcolemans commented on Mixed Output's instructable Wifi Dot Matrix Sign1 year ago
    Wifi Dot Matrix Sign

    My dream is to have a heads up karaoke display in the car so I can sing while driving. My vague plan is to use an Arduino with MP3 module to send audio to the car's stereo and send synchonized text to the scrolling display on the dashboard. However most karaoke files are MP3 + a CDG video file. I'd need something like an SRT file where the timing and words are in text. Ideas?

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