Kev Siv Hluav Taws Xob thiab Qhov Chaw Tam Sim No 4-20mA: 7 Cov Kauj Ruam

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:25

Cov lus qhia ntxaws no yuav ua li cas 0-20mA +/- 10V lub tshuab hluav taws xob teeb liab siv tus nqi pheej yig LM324 opamp. Cov hom hluav taws xob tsim hluav taws xob no muaj txiaj ntsig zoo hauv kev lag luam txhawm rau ntsuas cov tswv yim nkag los yog tsav cov khoom lag luam muaj zog.

Txawm hais tias nws muaj peev xwm yuav cov no lawv feem ntau kim thiab yog tias tawg tuaj yeem nyuaj kho. Kev siv cov khoom siv yooj yim tso cai rau koj los tsim cov khoom siv hluav taws xob uas tuaj yeem kho tau yog tias nws tawg ntawm ib feem ntawm tus nqi!

Cov khoom siv muaj nyob ntawm kuv lub khw Tindie lossis koj tuaj yeem ua rau koj tus kheej!

Kauj Ruam 1: Txoj Kev Ntseeg Me…

Cov schematic saum toj no piav qhia qhov hluav taws xob rau qhov hloov pauv tam sim no. Txij li qhov hluav taws xob ntawm opamps cov tswv yim sib npaug thaum lub davhlau ya nyob twg zoo yog 5V lub davhlau ya nyob twg tsis zoo yuav tsum zoo ib yam.

Tib qhov chaw rau qhov no los ntawm yog op amps tso tawm yog li ntawd op amp cov peev txheej txaus tam sim no kom ntseeg tau tias qhov dav tsis zoo nyob ntawm 5V. Yog tias V (R1) = 5V ces kuv (R1) = 5/250 = 20mA thiab txij li RL tsim cov ntawv cct (tsis muaj qhov ntws tam sim no mus rau (-) davhlau ya nyob twg) nrog qhov no nws yuav tsum muaj 20mA ntws los ntawm nws.

Yog li peb tuaj yeem tsim lub voj voog uas hloov pauv qhov hluav taws xob mus rau qhov tam sim no.

Saib ntawm cov ntawv teev npe rau LM324 peb tuaj yeem pom nws muaj peev xwm tsav 30mA thiab yog li ntawd tuaj yeem siv los ua lub hauv paus ntawm peb qhov yooj yim tam sim no tsis muaj txuas ntxiv transistor.

Ntxiv rau qhov peb xav tau 0-10V lossis +/- 10V tso tawm. Qhov no tuaj yeem ua tiav tau yooj yim los ntawm kev nthuav tawm 0-5V lub teeb liab peb tau tsim tawm 0-20mA cct los ntawm qhov tseem ceeb ntawm 2 los tsim 0-10V cov teeb liab tso tawm.

Txhawm rau tsim lub +/- 10V teeb liab peb tuaj yeem dag me ntsis thiab hloov kho peb lub tshuab hluav taws xob kom ua kom nrov nrov los ntawm qhov tseem ceeb ntawm 4 muab 0-20V tso tawm. Ib lub tshuab hluav taws xob thib peb tuaj yeem tsim lub cim 10V zoo li qub uas thaum siv los hais txog 0-20V teeb liab muab qhov hluav taws xob ntau ntawm +/- 10V.

Kuv tau muab cov lus qhia yuav ua li cas paub qhov no. Kuv muaj kev tiv thaiv diodes uas yuav lossis tsis tsim nyog nyob ntawm koj daim ntawv thov ntxiv rau ob peb lub lauj kaub rau kev txiav tawm.

Kauj Ruam 2: Cia Pib Nrog Cov Ntaub Ntawv

Nrog txoj kev xav tawm txoj hauv kev peb tuaj yeem tsim rooj plaub rau peb qhov project. Kuv tau siv lub hammond 1593PBK. Yog tias koj ua koj tus kheej PCB koj yuav xav xaiv qhov loj dua.

Kuv tau txiav txim siab ntxiv ib qho LED thiab ntau lub lauj kaub, Kuv kuj tseem xav tau lub swb swb ntawm ib sab ib yam li 2 kab txuas rau 0-20mA thiab +/- 10V.

Kuv tau tsim daim npog uas siv cov yas nplaum los pab nrog qhov qhia tau ntau yam.

Siv lub hauv paus nruab nrab xaum thiab lub npog npog tawm ntawm lub qhov thiab tom qab ntawd tshem tawm qhov:

• Taub 7mm
• LED 6.5 hli
• Cable nkag 5mm
• Qhov rau hloov 2mm

Lub hacksaw thiab cov ntaub ntawv tuaj yeem siv los txiav tawm lub qhov qhib rau qhov swb swb.

Thaum ua tiav thov daim npog npog thiab teeb LED, lub lauj kaub thiab hloov.

NCO TSEG - cov xov hlau ntev yuav tsum tau ua siab dav yog li lawv tuaj yeem txiav tom qab thaum peb sib dhos rooj plaub, txhua lub xov hlau yuav tsum tau cua sov ntsws txhawm rau tiv thaiv kab mob tawg.

Kauj Ruam 3: Ntxiv Cov Khoom Siv Hluav Taws Xob

Peb tab tom siv tus nqi pheej yig txhawb DCDC hloov pauv ntawm ebay. Qhov no tuaj yeem ua rau lub roj teeb 9V Kuv tab tom npaj siv txog 22V Kuv yuav tsum paub txog +/- 10V cct. Nws tau txais lub lauj kaub hloov kho Kuv yuav xav tau txiav me ntsis tom qab.

Txuas ib feem ntawm PP3 clip rau qhov swb swb thiab xaim lub dav hlau tom ntej mus rau DCDC cov tswv yim. Hlau kab thib ob ntawm PP3 clip mus rau lub davhlau ya nyob twg ntxiv ntawm DCDC hloov pauv. Tam sim no koj yuav muaj DCDC hloov pauv uas tau tswj los ntawm cov swb swb. DCDC yuav tsum tau ua kom pom zoo kom ua rau cov kauj ruam no yooj yim.

Tam sim no txuas ntawm ob peb ntawm cov xov hluav taws xob tso rau koj DCDC khaws qhov ntev ncaj ncees nyob rau theem no.

Siv rab phom kub kub txhawm rau txhim kho DCDC hloov chaw tab sis xyuas kom tseeb tias lub lauj kaub hloov qhov hluav taws xob tuaj yeem nkag tau. Tam sim no siv lub roj teeb PP3 thiab kho DCDC kom muab cov zis ntawm 22V.

CEEB TOOM - Txawm tias qhov hluav taws xob qis xws li 9V thiab 20V tseem tuaj yeem ua rau tuag taus yog tias lawv raug rau cov tawv nqaij ntub, thov ua tib zoo tiv thaiv thaum siv cov ntsuas no. Ib qho twg uas tsis tau siv yuav tsum tau nyab xeeb hauv cov davhlau ya nyob twg thaiv kom tsis txhob raug xwm txheej (tiag!). Tsis txhob siv qhov ntsuas no ze dej lossis tawv nqaij ntub.

Kauj Ruam 4: Lub Sijhawm Rau Qee Lub Cev Soldering…

Tam sim no koj tuaj yeem ua qhov no ntawm daim ntawv tais lossis ua koj tus kheej PCB zoo li kuv. Xijpeem nws yog lub sijhawm los sib sau ua ke.

Yog tias koj tsis tuaj yeem ua ntsej muag ua koj tus kheej lub thawv ntawv Kuv tau txais qhov tsawg ntawm kuv li kev muag ntawm tindie.

www.tindie.com/products/industry/handheld-…

Thawj qhov uas yuav tsum ua yog luam tawm cov txheej txheem thiab cov txheej txheem thiab sau cov lus piav qhia kom pom tias qhov twg txhua qhov khoom siv mus. Qhov no yooj yim dua li siv cov txheej txheem thiab yuav ua rau muaj qhov yuam kev tsawg dua.

Tam sim no muab tshuaj txhuam koj cov khoom sib xyaw, txiav cov khoom nrog cov txiav sab tom qab.

Los ntawm txoj kev yog tias koj siv daim ntawv qhia zaub mov koj yuav xav tau rooj plaub loj dua kuv.

Kauj Ruam 5: Xeem Leads

Kuv siv qee txoj hlua sib txuas sib txuas thiab muab qee cov xov hluav taws xob thiab cov hlua txuas los tiv thaiv cov xov hluav taws xob thiab qhia rau kuv paub tias cov xov tooj twg yog qhov twg.

Qhov no yuav muab rau kuv 2 xeem ua ib qho rau qhov hluav taws xob thiab ib qho rau tam sim no.

Kauj Ruam 6: Kawg Kawg

Tam sim no kuv yuav tsum tau pib siv cov khoom txuas ntxiv rau kuv PCB.

Nws tsim nyog tso tawm PCB ntawm qhov no thiab ua kom ntseeg tau tias nws yuav haum xws li tsis muaj kev sib tsoo. Muaj qee qhov khoom siab ntawm kuv tus PCB thiab qee qhov khoom siab ntawm kuv rooj plaub (lauj kaub, DCDC). Kuv yuav tsum tau ua kom ntseeg tau tias txhua yam yuav haum ua ntej kuv ua dab tsi.

Thaum kuv zoo siab nws mus ua ke Kuv tuaj yeem pib soldering thiab txiav kuv cov xov hlau ntev kom haum. Ntawm kuv tus PCB Kuv siv lub qhov nyem nyem qhov nkag / tawm cov ntsiab lus.

Thaum kuv paub tias nws yuav mus ua ke nws yog lub sijhawm rau commission nws…

NCO TSEG - Ceev faj nrog LED thiab lub lauj kaub raws li lawv xav tau muab muag rau qhov chaw kom raug, yog tias lub lauj kaub yog txoj kev tsis raug puag ncig nws yuav ua rau rov qab.

Kauj Ruam 7: Kev Ua Haujlwm…

Yog li ntawm kuv qhov kev tsim muaj 8 kauj ruam ua haujlwm txheej txheem.

Xyuas nws haum

Kuv puas kaw tau lub hau

Txheeb LEDCheck LED teeb thaum lub zog tawm ntawm PP3

Txheeb xyuas 5V siv

Fais fab PCB txheeb xyuas 5V siv cct muab 5V.

Tshawb xyuas 10V cov zis

Txheeb 10V tam sim no ntawm J2 tus pin 1

Txheeb xyuas 20V cov zis

Txheeb 20V tam sim no ntawm J2 tus pin 2, kho lub lauj kaub R12 txog thaum nws yog.

Txheeb xyuas +/- 10V kev ua haujlwm

Nruab nrab ntawm J1 thiab 2 nws yuav tsum muaj peev xwm tsim tau +/- 10V siv lub lauj kaub.

Txheeb xyuas 20mA cov zis

Nrog lub lauj kaub teeb tsa kom siab, kos J1 cov zis yog 20mA, kho lub lauj kaub R3 txog thaum nws yog.

Sib sau rooj plaub thiab sim dua

Sib sau ua ke thiab ua qhov kev tshuaj xyuas zaum kawg.