Spark coil
| Spark coil | |||||||||
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| Pattern type | Oscillator | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 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.
One or both of the houses can be replaced with other induction coils containing a line of three.
| Several ways to extend a spark coil and terminate it, using a honeycombinator, G, house, scrubber, piston, Line of three, phi spark, snake and p6 domino fountain. (click above to open LifeViewer) |
Commonness
- Main article: List of common oscillators
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
Spark coil can be very simply synthesised in four gliders via two colliding pi-heptominoes, which take two gliders each.
Hasslers
On February 16, 2022,[4] Charity Engine found a period-7 oscillator containing spark coil rotors being rephased as their casing is perturbed. As of February 11, 2024, it has occurred in 16 different stator variants, of 31 different period-7 oscillators in the D4_+2 census.
| (click above to open LifeViewer) Catagolue: here |
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.
- ↑ the attribute page for a more common but larger stator variant that was the first to occur
External links
- Spark coil at the Life Lexicon
- Spark coil at Adam P. Goucher's Catagolue
- 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
- Extendable oscillators