The current ofLEDkuwedzera nekuda kwezvikonzero zvakasiyana mukushandiswa. Panguva ino, matanho ekudzivirira anofanirwa kutorwa kuti ave nechokwadi chekuti LED haizokuvadzwa nekuti yakawedzera ikozvino inodarika imwe nguva uye amplitude. Kushandisa dhizaini yekudzivirira midziyo ndiyo inonyanya kukosha uye ine mari yekudzivirira chiyero. Iyo inonyanya kushandiswa kudzivirira chinhu cheMwenje we LEDkuchengetedzwa kwedunhu iri varistor.

Varistor inoshandiswa kuchengetedza mwenje we LED. Zvinogona kutaurwa kuti pasinei nemagetsi emagetsi, kushandura magetsi uye magetsi emagetsi anoshandiswa kune mwenje we LED, kudzivirira kwakadaro kunodiwa. Inoshandiswa kuchengetedza surge voltage inowanzoitika pamanetiweki magetsi. Iyo inonzi surge voltage inonyanya kupfupika-yepamusoro-voltage pulse inokonzerwa nemheni sitiroko kana kutanga uye kumira kwepamusoro-simba magetsi emagetsi. Mheni sitiroko ndicho chikonzero chikuru. Kurova kwemheni kunogona kukamurwa kuita mheni yakananga kurova uye kurova kwemheni isina kunanga. Kurova kwemheni kwakananga kunoreva kuti mheni inorova network yemagetsi zvakananga, izvo zvisingawanzo, uye mazhinji makuru emagetsi emagetsi magidhi ane matanho ekudzivirira mheni ivo pachavo. Indirect mheni sitiroko inoreva kuvhiya kunofambiswa pane gidhi remagetsi kunokonzerwa nemheni. Kuvhiya uku kungangoitika, nekuti mabhanan'ana 1800 uye kupenya kwemheni mazana matanhatu kunoitika pasi rese nguva dzese. Kurova kwega kwemheni kunokonzeresa kuwedzera kwemagetsi pagidhi remagetsi riri pedyo. Upamhi hwekupuruzira pulse kazhinji hushoma hudiki kana kupfupika, uye amplitude yekupuruzira inogona kunge yakakwira sezviuru zvevolts. Kunyanya nekuda kwekukwirira kwayo kwepamusoro, ine yakanyanya kukanganisa pakukuvadzwa kwemidziyo yemagetsi. Pasina dziviriro, marudzi ese emidziyo yemagetsi ari nyore kukuvara. Neraki, kudzivirira kwekuvhiya kuri nyore. Ingo wedzera anti surge varistor, iyo inowanzobatanidzwa mukufanana pamberi pekugadzirisa.

Nheyo yeiyi varistor ndeyotevera: kune kupesana kusina mutsara uyo kupikisa kuri pedyo nedunhu rakazaruka mukati memuganhu wakatarwa, uye kana simba rinoshandiswa richipfuura pachikumbaridzo, kushorwa kwayo kuri pedyo ne zero pakarepo. Izvi zvinoita kuti zvive nyore kubata kuvhiya. Uyezve, varistor chinhu chinogona kudzoreredzwa. Mushure mekuvhiya kunyura, inogona kuita basa rekudzivirira.