Know How...

Dec 21st 2017

Know How... 361

Christmas Feedback

LEDs, 3d filament, WiFi, WS2812, Arduino, ZPM, MSE Droid

Although the show is no longer in production, you can enjoy episodes from the TWiT Archives.
Category: Help & How To

In a Christmas edition of KH Feedback, Padre and Patrick Delahanty answer questions about lighting up workspaces and Christmas trees alike! Also, what filament does Padre trust why you shouldn't use hidden SSIDs, and previews of our 2018 KH projects.

LED Strip Lights
-- Bob Clingan
"I want to mount a 3-4 foot strip of LED lights under the cabinets above my work area. This looks pretty simple with an HUE light strip but kinda expensive.  Can this be achieved in DIY fashion more affordably? Pointers to any previous episodes that might be helpful are appreciated. I'm a relatively new viewer so I'm sure there may be something out there."
SMD 5050 LEDs (16.4" + Control Unit) ~$14
  • 300 LEDs that can do RGB via an IR remote & control unit
  • The ones with a silicon cover ALWAYS yellow over time
Could do it BETTER with an Arduino & a strip driver ~$8
Filament Suggestions
-- Heath Reeder
"Hey guys and gals, my 3d printer will arrive tomorrow, and I need to order some filament, any suggestions?  I would prefer to order from amazon but it's not a must. Also, what is the modeling program that Padre suggested?"
  • Typically runs $23-$33 (depending on color and type of filament)
  • Good accuracy
  • Prone to breaking if left out for an extended period of time
  • $16-$26
  • Less expensive than Hatchbox
  • Good durability (Doesn't enbrittle as quickly)
  • VERY good with transparent materials
eSun (Specialty)
  • PETG
  • ~$26
Asus Needs some Juice
-- John D. Hawkins
"So I was describing how awesome the dynamics of the group are to my wife when I realized I've been fighting an issue the KITA's might be able to help with on my home network.  Connectivity drops for my laptop and when I go to log into the router it says that my IP information has changed and the page will refresh.  The page refreshes and I'm up and running.  It wouldn't be a huge deal except it happens pretty frequently.  I tried giving my laptop a static IP address on the router but it didn't seem to do anything.  Would it help to put the same static IP on the laptop itself?"
High-level info on my network:
Router: ASUS RT-AC68U
Firmware: Updated 12/9
Networks: 2G, 5G, 2G Guest, 5G Guest
SSID Hidden for all networks
IoT devices: Echo Dots x2 on Guest
My kids' Pi3 on guest
PS3 (WL) & 4 (Ethernet)
TV (Ethernet)
Laptops x2 (WL)
Desktop x1 (WL)
iPhone x4
iPad x1
Christmas Project!
-- John Saunders
"I've placed an order for two 16.4ft WS2812B LED strips. My idea is to place them around the outside of my 2-door garage and program them based on time, whether the garage door is open of closed, and season. However, I've searched and could not find the answer for this:Can you install the WS2812 data wire in series of the two strips, so the end of strip 1 continues to send data to strip 2? I've already planned and wired for one massive power supply to independently drive the strips, but I didn't know if the data pin was as simple as wiring in series then changing the code to include the added LEDs. Thanks in advance."
We're going to preview the ZPM!
Project Summary:
A ZPM is an extremely powerful artifact from the "Stargate" Franchise what pulls zero-point energy from an artificially created pocket universe. (In other words, it has the ability to pull energy from this pocket universe until it reaches the point of maximum entropy" -- We're going to use it to light up our den!
Project Requirements:
  1. Battery Powered
  2. Should have the ability to do the traditional "golden" color of a ZPM + some animation
  3. Must have a way to turn OFF power completely (to prevent draining the battery pack)
  4. Must operate or more than 3 hours
  5. Should have a cradle for charging
  6. It's gotta look GOOD!
ZPM Parts
  1. Arduino Nano
  2. 1 x 18650 LiPo Cell (4000mAh)
  3. 2 x 16bit WS2812 LED Rings
Mouse Droid Preview!
Project Summary:
The MSE-6-series repair droid, sometimes referred to as the mouse droid, was a small, box-shaped, wheeled general purpose MSE-series droid often used for delivery and maintenance purposes. MSE-6 units were most notably on Star Destroyers and both Death Stars during the time of the Galactic Empire.
MSE-6 Parts:
  1. The outer shell (1:1 scale purchased from Granite Earth)
  2. Frame (wood or 3D printed)
  3. RC car (such as RJ Speed Legends or Traxxas Bandit)
  4. Wheels (3D printed) & tires
  5. side panels (parts salvage, parts run, or 3D printed)
  6. top rack (parts run or 3D printed)
  7. Bluetooth speaker
  8. Sound files

Connect with us!

Thanks to CacheFly for the bandwidth for this show.