We all have family, in one form or another. Parents, siblings, aunts, uncles, cousins, grandparents, friends, pets... In some cases, even a delapitated, 20 year-old Honda Civic lovingly referred to as Lou. It has rust in the rear quarter panels and the steering wheel squeeks when it gets cold, but things just wouldn't be the […]
APA102-2020 MicroNova Custom LED Choker
Solarbotics Ltd
February 23, 2018
I created this choker as a project to demonstrate the new MicroNova APA102-2020 LED strips.
Photo by Yeti, edited by Batgirl
These addressable LEDs are extremely small, less than 1/4 the size of a standard 5050 LED.
This project was built using engineering sample standard MicroNova 99 LED / meter strips . The MicroNova strips we are selling have 198/meter - twice the density!
Reason for a Choker necklace:
Hats have been done, shoes have been done, pendants have been done. This is something new for a Valentine’s dance costume, so I decided to go with a choker design. I also wanted something that was interactive, something that would add another layer of WOW to just lighting.
The Build:
I used a Wemos D1 Mini development board along with a boost-converting battery shield for the Wemos D1.
The battery shield was a particularly good choice here because the MicroNova LEDs should be supplied a solid 5VDC. This board boosts the battery voltage to 5V, and then the Wemos D1 Mini bucks it down to 3V3 for it's own operation.
A mini SPDT Slide switch toggles the power from the battery shield to the D1. This allows charging the battery using the battery shield USB connector while not powering the D1.
Epoxy locks the switch and wires in place.
The battery used is a conveniently handy older 450mAh Lithium Polymer. Depending on the lighting mode, this battery can power the necklace for a couple of hours.
I used elastic thread to attach the LED strip and components to the necklace. A heavy duty needle was all that was needed to punch through the (imitation) leather belt. Because the thread was elastic and tied under tension, it held the MicroNova strip well in place.
Operation:
When the choker powers up, it creates a WiFi Access Point called "HeartBurnChoker1".
Once I connected to this WiFi, I opened a browser and went to 192.168.4.1. The control interface is simple, but effective. The D1 Mini has more than ample power and speed to effectively drive these LEDs. The MicroNova features separate clock & data lines, so even relatively slow I/O (like Raspberry Pi) can still make it work.
Video of the Collar in Action
MORE POSTS
New Product: Thymio Robot and ESP01
Thymio II Educational Robot $182.25 The Thymio 2 is a fully-functional robot out-of-the-box, with a excellent pedigree. Thymio II Educational Robot - Wireless $249.75 The Thymio 2 is a fully-functional robot out-of-the-box, with a excellent pedigree. This wireless version offers some excellent live features not available in the stock version. ESP01 programmer $7.80 The ESP-01 […]
Project Monday: BEAM Solar Chariots
"Project Monday"? What the heck is that? We're giving our news postin' habits a bit of an overhaul. Here's the plan: instead of one massive newspost once a week, we're going to break things up a bit. Monday's we'll post a cool project or tutorial that might be fun to try. Wednesdays, we'll post some […]
The Marble Machine at Solarbotics
Aaaand this is a quick note to remind everyone that the Solar Marble Machine is now fully available for purchase from our website. Enjoy!
Solarbotics has been operating for more than 25 years, bringing electronics know-how and supplies to both the electronics professional and hobbyist. We'll be happy to help you too!
Solarbotics, Ltd. is not responsible for misprints or errors on product prices or information. For more information, please see our Terms and Conditions.
Warning: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.
Please visit www.P65Warnings.ca.gov for more information. This item was manufactured prior to August 31, 2018.