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What's the difference between a bike light app and a flashlight app or built-in flashlight function?
You shouldn't put LEDs directly in parallel like that, sharing one resistor, especially in something you're selling as a product, and especially in something that may be exposed to extremes of temperature, or light/shadows falling on some of the LEDs but not the others. LEDs will always have slightly different forward voltage drops, and whichever one has the lowest will pass the greatest current. This, combined with or partially caused by the environmental factors I mentioned, will cause that LED to wear out more quickly, accelerating the degradation. Eventually that one will burn out, and the one resistor will then be too small for the remaining LEDs, which will then burn out in succession. Instead, give each LED its own resistor, or put all of the LEDs in series (which obviously makes sure they all pass the same current, but requires much more voltage).
3D Printed PLA Hybrid Rocket with 3D Printed PLA Fuel
The intent is that the plastic (combusted with air or another oxidizer supplied through the hose) will produce the thrust, and the butane/naphtha/sawdust is just to help ignite it. So far we haven't managed to ignite it successfully, so I don't know if it actually does produce significant thrust.
Wait so the fuel itself is PLA plastic? Does the plastic itself generate thrust, or just the starter? Does it generate enough thrust to make an actual rocket? Sorry I dont know much about this stuff.
Over the past few hours, while writing my instructable 3D Printed PLA Hybrid Rocket With 3D Printed PLA Fuel, I was able to use the in-editor image uploader with no trouble. I have not retried the two library uploaders.
Transform a worn out tape measure into a plentiful supply of one foot rules.
10 Tips and Tricks for Laser Engraving and Cutting
Oh, and the new uploader tells me how to select multiple files, but if I do so, it then tells me I can only give it one file at a time.
I am having the same problem. Windows 7 Enterprise x64, Chrome and Firefox. Neither uploader works. The old uploader just spins forever and nothing gets uploaded. The new uploader says every photo failed with "Server (IO) error". I have checked to make sure I'm not blocking anything that could be required for this.
Digging Out: the Low Stress Way to a Clean Desk
Inverted shadows: a polarization frame
How to Make a Rainbow Felt-Tip Pen
DIY Transcribe Controller
Interactive led lamp | tensegrity structure + arduino
Simple Solar Circuits
For the YX8018, just do a Google search for the name and you can find some uses for it. One interesting one is a stable 5 V boost converter so you can run 5 V volt devices off of one or two 1.2–1.5 V cells.
Reverse Engineer RF Remote Controller for IoT!
One Format to Rule Them All
it's fully operational but has a wired remoteandStep 5: Wiring and remoteThough it has no stabilization nor even proportional control, so it will be incredibly difficult if not impossible to fly successfully at all.
3D Printing the San Francisco Sewers
Print A Bone on the Ember Printer
Spoken Word Chess Pieces
Encyclopedia of ATX to Bench Power Supply Conversion
Home-made Sun Jar (BFG dream jar)
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