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The printrbot already had pretty good print quality. I noticed marginal improvements in the 3 axis due to the x2 belt pulleys on the x and y and the m5 threaded rod on the z axis. Mostly in small detail prints with 0.1mm layer height.
Control RGB lights from Android with Arduino & Bluetooth LE (BLE)
Small LED Strip Controller with LED Amp and Arduino Nano
You can try to light up the array without the code. Attach 5V to a resistor and try to light up each of LEDs one at a time. This will tell you if it is a hardware or software. If the hardware is wrong rewire. If the code is wrong just double check it for errors.
Heatless (cold) Toner Transfer for PCB making
DIY 2G/3G/4G wireless cell phone signal booster
My Physical Web Space
Shelf Made Shed
Build a Robotic Remote Controller
Walking biped (4 servos per leg)
small folding table [UPDATED]
3D printed Survival Utility Knife
Super Light Quadcopter
Coffee Cold Brewer
InstaKISS : Networked Picture Frames
3D Printed DNA Lamp
An Almost Reliable, High Precision, 3D Printer: Son of MegaMax (SoM)
Make Your Own Smartwatch
3D Printed Desktop CNC mill
How to accurately calibrate your 3D Printer
Dead Bug Prototyping and Freeform Electronics
Extremely Low Cost 3D Printable 3D Printer / Plotter / CNC Machine
Build A Cheap Handcrafted CNC Mill
Increase the capacity (runtime) of your laptop battery.
3D printing / Brainstorming ideas and shapes for a light design.
The Eldredge Knot
Styrofoam chess game CNC hot wire cutted
Spark: The DIY Modular Tablet
Table Top Gaming Table Top
Casting Rings - From Startup to Finish
The real size LowCost robot wall.e made from water pipe and scraps
Customizable crossguard lightsaber, from The Force Awakens
Wall-e Project - Push toy Modified with an EZ-B
Build an autonomous Wall-E Robot
Dodecahedron 2015 Calendar
EWaste 60$ 3DPrinter
Poor Man's 3D Printer
Make An Ultimate Helping Hand Jig
Eggs in a Window
32x32 LED Matrix
3D Printed Humanoid Robot for under 1000.00 USD
Build a Foamcore CNC Machine
easy pcb etching holder
Arcadem Cardboredem "HOOPZ" -Mini Basketball Arcade Coinbank
Color changing display
long distance paper airplane
Low cost waveform generator (0 - 20MHz)
DIY - USB OSCILLOSCOPE IN A MATCHBOX
Technical sketching and drawing.
Polargraph Drawing Machine
Old laptop screen into Monitor
Burning the Bootloader on ATMega328 using Arduino UNO as ISP
A credit card sized Ethernet Arduino compatable controller board
Smartphone Charger Powered by Fire
Printer from a CD reader
Make Ferric Chloride (for etching printed circuit boards)
How to Convert a Laptop LCD into an External Monitor.
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