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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...see more »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).
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.
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.
3D Printed PLA Hybrid Rocke...View Instructable »
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
How to Document your Busy Bees
Bring Your burnt LED back to life!
Pocket Lens Spherometer
Scientific Research High Altitude Balloon for Fun and Profit
DIY functional Sonic Screwdriver
A Scientist's Guide to Citizen Science
DIY 3D Tilt Sensor
Numechron digital clock
The Camera Track and Boom System
Labyrinth - From a Single 2x4
Brush Your Teeth with a Bottle of Jack (Jack Daniels Toothbrush)
Dead computer reincarnated as art, furniture, or incubator for new life
Building your own Micromite Companion Minicomputer
Mini high voltage supply
The Bike Watch
Make the best tweezers around
Nixie Tube Geiger Counter
Lamina Nixie Clock
7 things we learnt building the sugru Rainbow Gatling Water Pistol
Tip For How To Remove Dents From Wood With Just An Iron
Silicone Rubber -- Try Something Different!
Vehicle Accessory Webbing
Understanding Italian Gestures
Card Rabbet Tool
Pulsing fluidic heart micropump
Measuring Tape/Belt — A pocket reference for your waist
Fireant Plenum Robot
Color changing display
Is the best PCB etchant in every kitchen ?
Nature Nanotechnology reports this DIY AFM (Atomic Force Microscope) / 自己動手做原子力顯微鏡 and DIY AFM controller get hacked
Free Electronic Samples
Home Semiconductor Manufacturing
Upcycling parts from a Laser Printers Fuser unit.
How to reverse engineer a schematic from a circuit board
Encyclopedia of ATX to Bench Power Supply Conversion
How To Hack An Apple Time Capsule With A Raspberry Pi
Design for a 3D Printed Culinary Centrifuge
Programmable Temperature Controller + Hot Plate
SPKR MiK: How to make a microphone from a speaker.
Impowered electrical outlets
Frankenstein Laser Engraver
Pocket laser engraver.
LEGO + Arduino = Brickduino (1. the LED)
Easy IKEA SUNNAN hack (non destructive)
Can't Find the Correct Drill or Wrench Size? Here's How...
Stop using Ferric Chloride etchant! (A better etching solution.)
LED Pocket Watch
Hands Free Photography with a Smart Phone
Rover transforming rocket
Projector Bulb Conversion To LED
LEVEL HEADED - EL WIRE HEADPHONES
How to remove and re-attach LCD Ribbon from a PCB with a Fine Pitch
Audio Delay Module
A Preamplifier for Smartphone Oscilloscopes
Embroidered Fabric Speaker
RaspberryPi Powered Wearable Computer
When a Phillips is not a Phillips Plus So Much More!
The Near-Perfect Tent: Design and Build a Recycled Tent
Hard Drive Persistence of Vision (HDPOV)
Model complex solid shapes with cardboard.
How To Make a Cryptex
Making a Really Easy Solder Dispenser
Home-made Sun Jar (BFG dream jar)
Paper, Plastic, or Furoshiki?
How to join a F.I.R.S.T robotics team
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