Dhonza pasi uye kukwevera kumusoro kuramba: zvese zvaunoda kuziva

resistance dhonza pasi dhonza kumusoro

Chokwadi dzimwe nguva wakasangana nemapurojekiti aunoda pushbuttons kana mabhatani ekuisa dhijitari, nekudaro uchikwanisa kudzvanya kuti ivhure kana kuvharika. Zvisinei, kuti rudzi urwu rwedunhu rushande zvakanaka, unoda resistors akagadzirirwa sekudhonza-pasi kana sekudhonza-kumusoro. Ndizvo chaizvo nekuda kweichi chikonzero tiri kuzokuratidza kuti zvii chaizvo zvigadziriso izvi, zvinoshanda sei, uye kuti ungazvishandisa sei mumapurojekiti ako Arduino.

Ziva kuti kudhonza-kumusoro uye kudhonza-pasi resistor zvigadziriso zvinobvumira seta standby voltages nekuti kana bhatani risina kudzvanywa uye nekudaro simbisa kuverenga kwakanaka kwedhijitari system, sezvo neimwe nzira, inogona kusaverengwa se0 kana 1 sezvainofanirwa.

push mabhatani

Chii chinoita resistor?

resistor kodhi kodhi

Unofanira kuziva sei kuramba Ndicho yakakosha yemagetsi chikamu iyo inogadzirwa nechinhu chinopesana nekufamba kwemagetsi emagetsi, ndiko kuti, kufamba kwemaerekitironi kuburikidza nayo, zvichiita kuti kufamba uku kunetse, simba remagetsi rinoshandurwa kuva kupisa, sezvo kukwesha kwemaerekitironi kuchaunza kupisa kwakataurwa.

Zvichienderana neiyo rudzi rwezvinhu, uye chikamu chayo, zvichatora basa rakawanda kana shoma kuti maerekitironi akwanise kufamba nechikamu ichi. Zvisinei, izvi hazvirevi kuti chinhu insulating, umo kwaisazova mukana kufamba maerekitironi kuburikidza nayo.

Kuedza uku kukunda maerekitironi kana zvasvika pakutenderera ndizvo chaizvo kusagadzikana kwemagetsi. Uhu ukuru hunoyerwa neOhms () uye inomiririrwa nebhii R. Nenzira imwecheteyo, maererano neOhm's Law formula, tine kuti kushorwa kwakaenzana ne:

R = V / Ini

Kureva, kuramba kwakaenzana nekugovanisa voltage nekusimba, ndiko kuti, volts pakati peamps. Maererano neizvi, kana isu tine simba rinopa simba rinogara riripo, kusimba kunenge kuri kushoma zvakanyanya kupikisa.

Dhonza Kupikisa

dhonza resistor

Sezvawaona, kuitira kuti voltage irege kusingagumi mudunhu rine pushbutton kana bhatani, kuitira kuti igare ichishanda nehupamhi hwepamusoro kana hushoma hwemagetsi, sezvinodiwa nedhijitari, a dhonza resistor, iro basa ndere kupatsanura voltage yakananga kunobva voltage (Vdd), inogona kuva 5v, 3.3v, nezvimwe. Nenzira iyi, kana bhatani rakavhurika kana pakuzorora, magetsi ekuisa anogara akakwira. Ndiko kuti, kana semuenzaniso isu tine dhijitari yedhijitari inoshanda pa5v, iyo yekuisa voltage yedhijitari yedhijitari inogara iri 5v mune iyi kesi.

Kana bhatani rikadzvanywa, ipapo ikozvino inoyerera kuburikidza neanopikisa uye ipapo kuburikidza nebhatani, ichitsausa voltage kubva pakupinza kuenda kudhijitari redunhu kusvika pasi kana GND, ndiko kuti, ingave 0v mune iyi kesi. Naizvozvo, nekudhonza-up resistor zvataizoita ndizvozvo iyo inopinza inenge iri pamutengo wepamusoro (1) chero bhatani risati rabatwa, uye kuti riri padanho rakaderera (0) kana radzvanywa..

Dhonza Pazasi Resistance

dhonza pasi resistor

Saizvozvo kune yapfuura, isu tine iyo dhonza pasi resistorKureva kuti zvinongopesana. Mune ino kesi isu tine iyo kana bhatani razorora voltage inopinda mudhijitari yakaderera (0V). Panguva iyo bhatani rikadzvanywa yakakwira voltage ikozvino inoyerera (1). Semuenzaniso, tinogona kuve ne5v kana tichidzvanya uye 0v kana tichiisiya yazorora.

Sezvauri kuona, ndizvo zvinopesana nekukwevera kumusoro, uye inogona kunyatsoshanda mune dzimwe nguva apo high voltage haina kuitirwa kutanga. pamwe izvi inokuyeuchidza zvakawanda relay, padzinowanzovhurwa kana kuti dzichiwanzovharwa, sezvatakamboona. Zvakanaka, ichi chinhu chakafanana ...

Inowanzobvunzwa mibvunzo

Pakupedzisira, ngationei zvimwe kusava nechokwadi kazhinji Nezve aya ekudhonza-kumusoro uye kudhonza-pasi resistor setups:

Ndeipi yandinofanira kushandisa?

Shandisa a kudhonza-kumusoro kana kudhonza-pasi configuration zvinoenderana neimwe nyaya. Ichokwadi kuti kudhonza-pasi kunogona kuve kwakakurumbira mune dzimwe nguva, asi haifaniri kunge iri yakanakisisa, kure nayo. Kuzvipedzisa:

  • Kana, semuenzaniso, uri kushandisa gedhi rine logic rine mabhatani maviri akabatana kune zvaro uye iwe uchida kuti zvinopinza zvive zero iwe usiri kuadzvanya, wobva washandisa kudhonza-pasi.
  • Kana, semuenzaniso, uri kushandisa gedhi rine logic rine mabhatani maviri akabatanidzwa kune zvaro uye iwe uchida kuti izvo zvinopinza zvive imwe iwe usiri kudzvanya, wobva washandisa kudhonza-kumusoro.

Sezvauri kuona, hapana chiri nani kana chakaipisisa, inongova nyaya yekuda.

Kugonesa Yemukati Kudhonza-kumusoro paArduino

Mamwe ma microcontrollers anosanganisira emukati ekudhonza-up resistors kuitira kuti agone kuvhurwa. Izvi zvinowanikwa nemimwe mirairo yakaiswa mukodhi. Kana iwe uchida kumisa kudhonza-kumusoro kweiyo arduino microcontroller, chiziviso chaunofanirwa kuisa mukuseta kwe sketch yako ndeiyi inotevera:

pinMode(pini, INPUT_PULLUP); // declare pini seyokupinza uye shandisa iyo yemukati yekudhonza resistor yepini iyoyo

Iyi tekinoroji inoshandiswa zvakanyanya ese ekubatanidza mabhatani ekusundidzira uye eI2C maseketi.

Ndeipi resistor value yandinofanira kushandisa?

Pakupedzisira, inofanirawo kutaurwa kuti inogona kushandiswa zvakasiyana-siyana resistor values mukudhonza-kumusoro nekudhonzera pasi zvigadziriso. Semuenzaniso, inogona kushandiswa kubva pa1K kusvika 10K zvichienderana nezvimwe zvinhu senge frequency yekusiyana, kureba kwetambo yakashandiswa, nezvimwe.

Mukuru wacho kushorwa kwekudhonza-kumusoro, iyo inononoka pini ndeyekupindura kuchinja kwemagetsi. Izvi zvinodaro nekuti sisitimu inodyisa pini yekupinza ndeye capacitor pamwe chete nekudhonza-up resistor, nekudaro kugadzira RC wedunhu kana sefa, izvo zvinotora nguva kubhadharisa uye kuburitsa sezvaunotoziva. Naizvozvo, kana iwe uchida masiginecha anokurumidza, zviri nani kushandisa zvinopikisa pakati pe1KΩ ne4.7KΩ.

Sezvo mutemo, vazhinji vanodhonza-kumusoro uye kudhonza-pasi setups vanoshandisa resistors ne 10KΩ kukosha. Uye izvi zvinodaro nekuti zvinokurudzirwa kushandisa kuramba kanokwana ka10 zvishoma pane iyo impedance yepini yedhijitari iri kushandiswa. Kana mapini edhijitari achishandiswa sekuisa, ane chinosiyana impedance, zvichienderana neiyo chip yekugadzira tekinoroji, asi kazhinji iyo impedance ndeye 1MΩ.

Izvo zvinodiwawo kufunga nezve mashandisirwo uye zvazvino izvo zvichapinda mudhijitari wedunhu, iyo yakaderera kushorwa, iyo yakakwirira ikozvino uye saka yakanyanya kushandiswa uye ikozvino ichapinda chip. Uye isu hatigone kuisa yakanyanyisa kupikisa kuti tive nekushandisa kwakaderera, nekuti kana ikozvino iri diki kwazvo zvinogona kuitika kuti chip hachikonzereki nekuchinja kudiki kwakadaro uye haizive kana iri pakakwirira kana yakaderera voltage nguva dzese. . Semuenzaniso, munharaunda ine 5V simba rekushandisa, kupikisa kunogona kuva 10KΩ, kuziva kuti ikozvino iyo ichapinda dunhu ndeye 0.5mA, chimwe chinhu icho maererano nekushandiswa hachina basa, sezvo inofunga simba re 2.5 mW.


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  1. Inotarisira iyo data: Miguel Ángel Gatón
  2. Chinangwa cheiyo data: Kudzora SPAM, manejimendi manejimendi.
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