Summary of Interactive Cylindrical Cube
This article describes an interactive cylindrical LED cube featuring proximity sensing via infrared LEDs and photo-transistors. The project uses an 8x8 grid of royal blue LEDs, arranged in a cylinder with a 50mm inner diameter. It incorporates 12 infrared LEDs for sensing and 16 photo-transistors to detect objects, allowing the device to function as an interactive flowerpot.
Parts used in the Interactive Cylindrical Cube:
- 64 Royal Blue LEDs
- 12 Infrared LEDs
- 16 Photo-Transistors
- Wooden Template
- PVC Pipe (50mm diameter)
- Current Limit Resistors (100 ohm)
- Current Limit Resistors (100 ~ 150 ohm)
- Resistors (~10Kohm)
- Soldering Materials
This is a creative cylindrical LED cube with proximity sensing by infrared led and photo-transistors. Interactive Cylindrical Cube includes: 8X8 royal blue LEDs, 12 infrared LEDs, 16 photo-transistors and all of them are bent & formed a cylindrical shape.
Please see video below when this interactive cylindrical cube is used as flowerpot.
Step 1: Bill of Material
Step 2: Project Schematic
You can download high resolution version at link: Interactive Cylindrical Cube Schematic
Step 3: Assembly and Soldering
- Cylindrical cube arrangement:
Let see the picture above to understand how to arrange Leds – Phototransistors – Infrared Leds.
– Yellow row: photo-transistors (x16 pcs), Common – Collector type with with RE ~ 10Kohm.
– Green color: infrared Leds (x12 pcs), connect to 5V with current limit resistor 100 ~ 150 ohm.
– White color: royal blue LED (x64 pcs), with current limit resistor 100 ohm.
- Build a cylindrical led 8×8:
In order to arrange leds in cylindrical form, I used a flat wooden template with LED spacing 20mm. And after all leds were soldered, I bent them to a cylindrical shape of 50mm inside diameter and 80mm outside diameter.
TIP: I used a PVC pipe with 50mm diameter and bent it slowly following this shape, then using a wooden template to fix the first column of leds while soldering last column and first column together.
Source: Interactive Cylindrical Cube
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How is the cylindrical shape formed?
A flat wooden template with 20mm LED spacing is used, then the soldered LEDs are bent into a cylinder with a 50mm inside diameter. -
What components provide the proximity sensing?
The system uses 12 infrared LEDs and 16 photo-transistors to enable proximity sensing. -
How are the photo-transistors connected?
The 16 photo-transistors are arranged in a yellow row as Common - Collector type with approximately 10Kohm resistors. -
What resistor value is used for the royal blue LEDs?
Royal blue LEDs require current limit resistors of 100 ohms. -
Can this project be used as a flowerpot?
Yes, the interactive cylindrical cube can be used as a flowerpot as demonstrated in the video. -
How do you fix the first column of LEDs during assembly?
A PVC pipe with 50mm diameter is bent slowly to the shape, and a wooden template fixes the first column while soldering the last and first columns together. -
What are the dimensions of the final cylinder?
The final cylinder has a 50mm inside diameter and an 80mm outside diameter.
