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  • SeanB10 commented on GreatScottLab's instructable Make Your Own Solid State Relay3 days ago
    Make Your Own Solid State Relay

    My experience with zero crossing detectors and triacs to switch any device that induced a phase shift would destroy the triacs and leave them running, or short them out so to speak. The problem is that the triac is switch on at the wrong time because zero crossing detector couldn't handle the phase shift. This is motors, old CRTs, the like. You could tune the detector for a given phase shift. My solution was a relay.

    I suggest using a relay for the benefits mentioned in the video. Slow but nothing complex about them. Just use a flyback transistor across the solenoid coil and use an NPN transistor between the coil and ground to switch it. 15A is big, pumps switch slow, and ratings are reliable. Sainsmart relay boards are nice because they have optoisolators, protection diodes and relays, and little leds, all packaged pretty cheap. To get a sizable relay for your use, spec it out.

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  • SeanB10 commented on K3WFN's instructable Building a Solar Projector1 week ago
    Building a Solar Projector

    Not really, better than paper or tissue or other things, light transmission was pretty good and tension solved most wrinkle issues, it's highly uniform. A white garbage bag might make a good larger screen.

    I find a thin super cheap white plastic grocery bag makes a great screen.https://www.youtube.com/watch?v=S3V00X-O6mQ&t=55s

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  • Poor Man's Google Glass/Aid for Those With Tunnel Vision

    Thanks for the cover art to my new Night Core album!

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  • SeanB10's instructable Scrappy Hot Wire Cutter's weekly stats: 1 month ago
    • Scrappy Hot Wire Cutter
      4,847 views
      84 favorites
      12 comments
  • SeanB10 commented on tomanek007's instructable Clumsy House Decorator Costume.1 month ago
    Clumsy House Decorator Costume.

    This is going to be big. Huge.

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  • DIY Hot Wire Cutter for Plexiglass, Cardboard and Foam

    This was the inspiration for making my own wire cutter. Mine was more thrown together but table format and alligator clip was all you. I even made my own instructable. So far I've made a mess.

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  • SeanB10 commented on SeanB10's instructable Scrappy Hot Wire Cutter1 month ago
    Scrappy Hot Wire Cutter

    That would be much more efficient than moving an alligator clip along the nichrome. However, this project is devoid of electronics, soldering is optional. I love the 555 and use a few as flip flops. My mosfets are still in China but I may add a PWM controller later.

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  • SeanB10 commented on SeanB10's instructable Scrappy Hot Wire Cutter1 month ago
    Scrappy Hot Wire Cutter

    According to my calculations, a 1 amp 5 volt connection, say from a USB charger, should be enough to run at least 5 inches of 32 gauge nichrome. 12 volts was plenty and when I ran it full tilt the wire glowed red so that is probably too much. Thank you for your kind comments.

    Don't forget to smash that "I made this button" when you do!

    Thanks! I also added a switch and that has been super useful.

    Thank you for the encouraging message.

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  • Paleo Lighter - friction fire in your pocket!

    You could use your mind powers too. It's where the word "focus" comes from.

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  • SeanB10 commented on Nobilis's instructable Battery float charger1 year ago
    Battery float charger

    Laptops and cell phones do not use lead acid batteries (well, I could betray my age and say the very first cellular phones did, but that was a long time ago, and they looked more like suit cases than phones). Laptops and cell phones use Lithium based batteries, either Lithium Ion (LION) or Lithium Polymer (LIPO) batteries, and the chargers monitor every cell, and discharge also monitors every cell, so in short, do not build your own chargers for these devices. Lithium batteries are much, much more dangerous than lead acid batteries, and can catch fire and explode quite easily when improperly charged. There are Darwin Award contestants on YouTube that hit lithium batteries with HAMMERS to get them to explode. I do not recommend hacking lithium batteries, especially if you still own a...

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    Laptops and cell phones do not use lead acid batteries (well, I could betray my age and say the very first cellular phones did, but that was a long time ago, and they looked more like suit cases than phones). Laptops and cell phones use Lithium based batteries, either Lithium Ion (LION) or Lithium Polymer (LIPO) batteries, and the chargers monitor every cell, and discharge also monitors every cell, so in short, do not build your own chargers for these devices. Lithium batteries are much, much more dangerous than lead acid batteries, and can catch fire and explode quite easily when improperly charged. There are Darwin Award contestants on YouTube that hit lithium batteries with HAMMERS to get them to explode. I do not recommend hacking lithium batteries, especially if you still own all your body parts.

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  • SeanB10 commented on jessyratfink's instructable Unusual uses for ice cubes1 year ago
    Unusual uses for ice cubes

    Neato! FYI diamond is a phenomenal heat conductor. Cubic zirconium is more like an insulator. Hence diamonds are very easy to identify by touching them to say, a light bulb or other mild heat source.

    You can also use them to shrink metal parts slightly for difficult nuts/bolts, or fitting a tight pin into a hole, etc. If it is small enough you could just put the part you want to shrink in the freezer.

    You might want to look into a bidet. Toto makes something called a washlet and I swear by mine, it's integrated into the toilet seat, all you need to install it is a gfci outlet, it taps off the tank supply and heats the water too. And the seat.

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