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  • LeeDr850 commented on Biodynamic's instructable Soda Bottle Rockets!!5 weeks ago
    Soda Bottle Rockets!!

    We did these with my Cub Scout pack with a few differences;We figured out that a garden hose in some areas has about 90 PSI pressure so we just slide a bottle down onto a PVC pipe that we had heated up (like with a candle) and pushed to make it swell a bit. Push the bottle down pretty hard on to that and turn on the hose. You end up with about the right amount of water and compressed air in the bottle. The bottle releases once the pressure gets high enough. I know, it's not very accurate but it's super-simple. I'm sure there's instructables showing this technique.I purposely angled all the fins on one bottle the same direction so it would spiral as it flew (like how a bullet goes through a rifled barrel). This seemed to make it fly straighter.We generally used a single bottle for ...

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    We did these with my Cub Scout pack with a few differences;We figured out that a garden hose in some areas has about 90 PSI pressure so we just slide a bottle down onto a PVC pipe that we had heated up (like with a candle) and pushed to make it swell a bit. Push the bottle down pretty hard on to that and turn on the hose. You end up with about the right amount of water and compressed air in the bottle. The bottle releases once the pressure gets high enough. I know, it's not very accurate but it's super-simple. I'm sure there's instructables showing this technique.I purposely angled all the fins on one bottle the same direction so it would spiral as it flew (like how a bullet goes through a rifled barrel). This seemed to make it fly straighter.We generally used a single bottle for ours. We hot glued foam board fins on. We made nose cones out of paper and taped them on (they didn't last once they got wet but they also won't hurt anybody if they fall on you). WARNING: A 2-liter bottle like these falling down on a car could put a small dent in it so make sure you're clear of parking areas.

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  • LeeDr850 commented on Honus's instructable Kitchen Remodel on a Budget5 months ago
    Kitchen Remodel on a Budget

    I've been thinking I'd rather have some large drawers on the bottom cabinets instead of a door and shelves. I see you put slide out drawers behind the door in this picture;"Step 2: Budgeting -both Time and Money"Did you consider just having drawers with faces on them vs behind a door you have to open? And the previous comment from ycc who used IKEA cabinets, wonder if you used more drawers on the bottom or stuck with cabinet doors?

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  • DIY Grid Tied Inverter (doesn't Feed the Grid) UPS Alternative

    What you've described here is not actually a "grid tied" system. It's an off-grid solar power system with a transfer switch. In a grid tied system the inverter is sync'd with the AC frequency of the main power grid and can supply some percentage of your power (sometimes more than 100% and that would feed back into the grid).But you made great efforts. I also think along the lines of @ron342 (minus the blocking diodes) that picking a few house circuits that could be dedicated to the solar power system might be best. Ideally ones that have most of their load during the day when the sun is up.

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  • Face detection Security System using Pi, Node-red, IBM-Watson, Twilio, Email service

    Thanks for the instructable! I think I have all the parts needed, Raspberry Pi, PIR sensor, and spare Android phone. I already use IP Webcam on my front door and iSpy Control on a PC to detect motion and record video clips. But the wind blowing trees and other things cause a lot of false motion detection.I also just tried out Salient Eye mobile Securityhttps://play.google.com/store/apps/details?id=com....For that all you need is the old Android phone and it detects motion (not necessarily people or faces) and can alarm, email, and/or sms. Only took about 10 minutes to install, setup, and test.

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