Art and Technology are Friends

Posts tagged “Art

R48 and Li-Ion Charger

R48 comes with a non-rechargeable battery (CR2450) and a black cord (lanyard) to hang around the neck. The battery lasts for about 7-8 hours in continuous run.

There are also rechargeable battery (LIR2450) and the charger available. With those, you won’t need to keep buying batteries.
The charger is very compact and plugs right into an USB port.


White LEDs look yellow when they are not lit. Other colors (red, green, and blue) look like the photo above.

Features/Notes:

  • Available with 4 different color LEDs: Red, Green, Blue, and White.
  • Each R48 is fully assembled, and comes with a non-rechargeable battery (CR2450, easily replaceable).
  • Battery will typically last about 7-8 hours continuously.
  • Also comes with black cord (lanyard) to hang R48 around your neck.
  • 25 beautiful animation patterns preprogrammed.
  • “Demo” mode automatically runs though all animation patterns – changes every minute. (Activated by holding the button at the startup.)
  • Rechargeable battery (LIR2450) is also available as an option. This recommended option lights the LEDs brighter, as it has higher voltage.
  • The charger for the above is also available.
  • Dimension: 1.9 inch diameter, 0.4 inch thick (including the battery)

In-stock and shipping now!


R48 – an Wearable LED Gadget Pre-order Starts

Here’s the sneak peak at the upcoming wearable piece – R48. (I promise that better video will come soon.) Four different LED colors (Red, Green Blue, and White) are planned, but the first color available would be blue.

The item will be in stock in the 3nd week of July, and the price will be $49. Pre-order starts now at $45 a piece.

Also available are optional rechargeable Lithium-Ion battery and the charger. The charger is very compact and plugs into an USB port. The photo below is showing the prototype. The final version will look better in black. (Will post the photo as soon as available.)

Features/Notes:

  • Each R48 will be fully assembled, and comes with a non-rechargeable battery (CR2450, easily replaceable).
  • Battery will typically last about 5 hours continuously.
  • Also comes with a black cord to wear R48 as a neckless.
  • 25 beautiful animation patterns preprogrammed.
  • “Demo” mode automatically runs though all animation patterns – changes every minute. (Activated by holding the button at the start up.)
  • Rechargeable type battery (LIR2450) is also available as an option. This recommended option lights the LED brighter, as it has higher voltage.
  • The charger for the above is also available.
  • Dimension: 1.9 inch diameter, 0.4 inch thick (including the battery)

R48 is now shipping – pre-order is ended.


Aurora 9×18 Teaser Video

I thought it’s time for me to start putting some effort in creating better presentation of the work I do. Here are two versions of video that showcase Aurora 9×18.


Aurora 9×18 assembled

Just finished assembling Aurora 9×18. Based on the prototype aurora 9, this unit has 18 tri-color LEDs in each of 9 circles.
Because of the number of components (162 LEDs), assembly was quite a chore. Tri-color LED has pins that are close together, very narrow for a through-hole component. Solder bridging can happen very easily. (I’ve been soldering for over 30 years now, and thought I had good enough skill to get through the soldering, but I had a bit of a struggle…)

Now it’s done, and the hard work is worth it. It’s beautiful… LEDs are controlled in 9 groups of 18 each. Each group of LEDs are forming a circle. Each RGB component is controlled by PWM, with effective resolution of about 13 bits.

The colors produced by those LEDs are beautiful, the transitions between colors are smooth. To me this is fascinating…

Here’s the schematic if you are interested.
Aurora 9x18 Schematic


Sneak Peek

Here’s a sneak peek at the new creation. Those small (4 inch dia.) ones are created as teaser/samples of my other, larger objects.

Each has 144 white LEDs. 8 channel PWM to create smooth motion of lights. This microcontroller (PIC16F616) only has one 10 bit PWM module, however I’m combining the hardware PWM with software PWM to create very smooth (equivalent to 16 bit or more resolution) gradation.


LED art installation in Brooklyn

Installation overview


Close up

Held at Goliath Visual Space in Brooklyn, NY.
11 circuit boards with 576 LEDs each creating various patterns of moving lights.