A saan bi duuru ye nin ye, mɔgɔw tun be lɔnniya jɔnjɔn faamu ka ban ko fɛɛn minw be se ka yeelen bɔ, ani diyɔdi fɔlɔ min be sɔrɔ jagokɛyɔrɔw la, o dilanna saan 1960. LED ye Light Emitting Diode ka kuma surun ye. A ka baara jɔnjɔn ye fɛɛn dɔ ye min be yeelen bɔ ani a be bila nɛgɛdaga dɔ kan, o kɔ, a be datugu ni epokisi ye walisa ka nɛgɛjuru kɔnɔnafɛnw latanga, o min b’a to LEDw be se ka yɛlɛma ɲuman kɛ.
Yeelen-diyɔdi min be yeelen bɔ, o yɔrɔ ye p-sugu ani n-sugu tilancɛlanw ye. p-sugu ni n-sugu tilancɛlanw cɛ, yɛlɛmayɔrɔ dɔ be yen min be weele ko ap-n ɲɔgɔndan. PN ɲɔgɔndan na minan dɔw la minw be yɛlɛmayɛlɛma, ni fɛn misɛnninw minw donna, olu be fara ɲɔgɔn kan tugun ni fɛn caaman ye, fanga caaman be bɔ yeelen cogoya la, o cogo la, kuran ka fanga be yɛlɛma ka kɛ yeelen fanga ye. Ni yɛlɛmani donna PN ɲɔgɔndan na, a ka gwɛlɛ ka fɛn misɛnw don, o la yeelen si tɛ bɔ.
O diyɔdi sugu min dilanna ni pikirikɛlan yeelenbɔlan sariya ye, o be weele ko diyɔdi min be yeelenbɔ -, min be weele ko LED. N’a be baara kɛcogo la ɲɛfɛ (o kɔrɔ, ɲɛfɛ tansɔn be don a ka yɔrɔw bɛɛ la), komi kuran be bɔ LED anodi la ka taga katodi la, kristali semi-conducteur be yeelen bɔ min ɲɛgɛnw tɛ kelen ye k’a ta ultraviolet ma ka taga a bila infrarouge la, ani yeelen fanga be taga ni kuran ye.
