Spark coil
| Spark coil | |||||||||||
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| Pattern type | Oscillator | ||||||||||
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| Oscillator type | Babbling brook | ||||||||||
| Number of cells | 18 | ||||||||||
| Bounding box | 8×5 | ||||||||||
| Frequency class | 24.0 | ||||||||||
| Period | 2 | ||||||||||
| Mod | 2 | ||||||||||
| Heat | 2 | ||||||||||
| Volatility | 0.10 | ||||||||||
| Strict volatility | 0.10 | ||||||||||
| Rotor type | Orthogonal on-off | ||||||||||
| Discovered by | Unknown | ||||||||||
| Year of discovery | 1971 | ||||||||||
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The spark coil is a period-2 oscillator found in 1971.[1][2] Despite its name, it does not produce sparks; however, the rotor resembles an electric spark.
Welded together with minimal separating stators, it can be extended indefinitely along its axis, so that it is the first in a series that continues with the piston and the long piston. It can also be arranged in two directions, as shown at Agar#Tile_agars.
Commonness
Spark coil is the eleventh most common naturally-occurring oscillator in Achim Flammenkamp's census, being less common than the figure eight but more common than the mold.[3] It is the eleventh most common oscillator on Adam P. Goucher's Catagolue.
In even orthogonal symmetries (D2_+2, D4_+2, D4_+4, D8_4), it is the sixteenth to twentieth most common object, fourth to sixth most common oscillator, and fourth most common period-2 oscillator.
Glider synthesis
All strict still lifes with a population of 20 or fewer cells, as well as all oscillators and spaceships with 16 or fewer cells, are known to be glider-constructible. A glider synthesis of this object can be found in the infobox to the right.
See also
References
- ↑ Robert Wainwright (September 1971). Lifeline, vol 3, page 3.
- ↑ Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.
- ↑ Achim Flammenkamp (September 7, 2004). "Most seen natural occurring ash objects in Game of Life". Retrieved on January 15, 2009.
External links
- Spark coil at the Life Lexicon
- 18P2.28 at Heinrich Koenig's Game of Life Object Catalogs
- Patterns
- Patterns with Catagolue frequency class 24
- Natural periodic objects
- Oscillators with 18 cells
- Periodic objects with minimum population 18
- Patterns with 18 cells
- Patterns found in 1971
- Patterns that can be constructed with 4 gliders
- Oscillators
- Babbling brooks
- Oscillators with period 2
- Oscillators with mod 2
- Oscillators with heat 2
- Oscillators with volatility 0.10
- Oscillators with strict volatility 0.10
- Oscillators with rotor Orthogonal on-off
- Patterns with rectangular orthogonal symmetry