Spark coil

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Spark coil
2o4b2o$obo2bobo$2bo2bo2b$obo2bobo$2o4b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ GPS 2 THUMBSIZE 2 ]]
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 | 0.10
Kinetic symmetry +e
Rotor type Orthogonal on-off
Discovered by Unknown
Year of discovery 1971

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.

x = 37, y = 24, rule = B3/S23 20b2o2$16bo8bo$15b2o8b2o$15b2o8b2o$18b6o$13bo14bo$12b4o10b4o$11bo3bo10b o3bo$12b3o12b3o2$bo34bo$obo4bo4b3o3b2o7b3o4b3o$bobo2bobo2bobobobo2bo2b o2bobobo2bo$3bo2bobo2b2ob2obo2b4o2b2ob2o2bob2o$bobo2bobo2bobobobo2bo2b o2bobobo2bo2bo$obo4bo4b3o3b2o7b3o4b2o$bo2$12b3o12b3o$11bo3bo10bo3bo$11b obobo10b2ob2o$12bobo$13bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ ZOOM 12 AUTOSTART GPS 2 ]]
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.
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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.

x = 18, y = 13, rule = B3/S23 2b2ob2o4b2ob2o$3bobobo2bobobo$bobobob4obobobo$obobo8bobobo$o16bo$b5o6b5o2$b5o6b5o$o16bo$obobo8bobobo$bobobob4obobobo$3bobobo2bobobo$2b2ob2o4b2ob2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 3 HEIGHT 480 ZOOM 30 AUTOSTART GPS 2 ]]
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Catagoluehere

See also

References

  1. Robert Wainwright (September 1971). Lifeline, vol 3, page 3.
  2. Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.
  3. Achim Flammenkamp (September 7, 2004). "Most seen natural occurring ash objects in Game of Life". Retrieved on January 15, 2009.
  4. the attribute page for a more common but larger stator variant that was the first to occur

External links