Tau Paub Txog "Professional ILC8038 Function Generator DIY Kit": 5 Cov Kauj Ruam

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:24

Kuv tab tom hais txog qee qhov haujlwm tshiab hluav taws xob thaum kuv hla dhau qhov ntxim nyiam me me ua haujlwm cov khoom siv hluav taws xob. Nws tau sau nqi raws li "Professional ILC8038 Function Generator Sine Triangle Square Wave DIY Kit" thiab muaj los ntawm tus lej muag khoom ntawm eBay rau 8 txog 9 daus las (daim duab 1).

Daim duab 1. Tus Ua Haujlwm Me Me

Nws tau tsim nyob ib puag ncig Intersil ILC8038 lub tshuab hluav taws xob ua hluav taws xob nti raws li lub npe cuam tshuam. Nws yog qhov rov ua dua tshiab ntawm cov khoom siv hluav taws xob ua haujlwm uas tau muaj los ntawm eBay lossis Amazon ib ntus. Nws zoo li txaus txaus uas kuv xaj ib qho. Thawj qhov teeb meem - cov khoom siv nkoj los ntawm Tuam Tshoj yog li muaj li ob peb lub lis piam ncua ua ntej kuv tau txais nws, tab sis nws tau tuaj txog hauv lub sijhawm qhia.

Cov khoom siv tuaj txog lawm thiab tiav. Tag nrho cov khoom tau tshwm sim tiag tiag thiab PCB thiab cov ntaub ntawv acrylic tau ua tau zoo. Tom qab ntawd kuv tau txais cov lus qhia - ZOO TSHAJ PLAWS. Cov lus qhia, xws li lawv tau, zoo li lawv tau theej thiab txo kom haum rau ntawm 5.75 x 8 "daim ntawv, uas ua rau ntau kab tsis nkag siab (ntxiv rau qhov tseeb lawv tau sau ua pigeon Askiv). Cov tib peb ntu (ntu 3, 4 thiab 5) tau luam tawm ntawm ob sab pem hauv ntej thiab tom qab ntawm daim ntawv "qhia", tsis muaj Tshooj 1 lossis 2. Qhov no yog hmoov tsis zoo, vim tias tsis muaj ib yam dab tsi los qhia qhov muaj txiaj ntsig zoo nyob hauv qhov twg lub PCB.

Kuv tau sau Cov Lus Qhia no rau txhua tus uas muaj teeb meem zoo ib yam lossis lwm yam teeb meem, lossis leej twg tab tom txiav txim siab tsim lub pob khoom me me zoo no. Cov lus qhia ib qib zuj zus suav nrog tsis yog rau kev sib dhos nkaus xwb tab sis tseem siv ILC8038 lub tshuab hluav taws xob ua haujlwm.

Khoom siv

Ib lossis ntau dua "Kev tshaj lij ILC8038 Cov Khoom Siv Hluav Taws Xob DIY Cov Khoom Siv"

Ib qho Oscilloscope.

Cov hlau txuas thiab cov khoom siv ib txwm muaj ntawm cov cuab yeej hluav taws xob me me (tweezers, cov ntsia hlau tsav, thiab lwm yam).

Kauj Ruam 1: Yuav Muab Nws Ua Ke Li Cas?

Ntau yam ntawm cov khoom tuaj yeem nkag siab tau los ntawm kev saib cov duab hauv PCB (daim duab 2).

Daim duab 2. Luam Circuit Board

Cov kab hluav taws xob (JK1), 3 txoj haujlwm dav dav dav dav (JP3), IC qhov (socket), jumper strips (JP1 thiab JP2), ICs U1 thiab U2, trimpots (R2 thiab R3), thiab cov tshuab hluav taws xob tuaj yeem tso nrog qhov tseeb, tab sis resistors, capacitors ceramic, ICs U3 thiab U4, thiab potentiometers (ib tus muaj tus nqi sib txawv dua li lwm qhov 3) tab tom nthuav tawm qhov teeb meem. Yog tias koj muaj lub qhov muag ntse koj yuav tuaj yeem nyeem cov npe ntawm ICs thiab cov xim xim ntawm tus tiv thaiv hauv daim duab 1. Dab tsi peb xav tau tiag tiag yog cov lus qhia zoo dua lossis cov phiaj xwm zoo. Kuv tsis muaj peev xwm nrhiav tau cov lus qhia zoo hauv is taws nem, tab sis kuv tau pom cov duab ntawm cov lus Suav. Hmoov zoo, cov cim hluav taws xob zoo nkauj heev thoob ntiaj teb thiab cov khoom muaj txiaj ntsig tau ua lus Askiv (daim duab 3). ICs U2 thiab U4 tau ploj lawm tab sis kuv tuaj yeem ua qhov zoo nkauj ntau qhov khoob. Kuv tau sau ib daim nqi ntawm cov ntaub ntawv (BOM), sib piv PCB cov khoom nrog lawv qhov tsim nyog, uas yog txhua yam koj xav tau tiag tiag los ua ke cov khoom siv. BOM suav nrog qhov kawg ntawm Cov Lus Qhia no.

Ntxiv rau cov txheej txheem thiab cov npe khoom kuv tseem tau muab cov lus qhia ib qib zuj zus ntawm kev sib dhos thiab ua haujlwm ntawm lub tshuab ua haujlwm me me txias no, yog li cia peb mus rau nws.

Daim duab 3. Schematic

Kauj Ruam 2: Cov Khoom Ua Ke

1. Solder hauv txhua qhov khoom siv inert (IC qhov (socket), jacks, dhia, thiab lub dav hlau). Nco ntsoov tias qhov thais ntawm qhov kawg ntawm txhua lub qhov (socket) IC sib haum nrog lub thais hauv nws daim duab PCB.

2. Solder tus resistors, trimpots, thiab potentiometers. Ceev faj kom tau txais 50kΩ potentiometer hauv R5 txoj haujlwm (AMP). Lwm cov potentiometers yog txhua 5kΩ.

3. Solder lub capacitors. Cov hmoov txhuas tsis zoo ntawm txhua lub tshuab hluav taws xob mus los ntawm lub qhov nyob hauv qhov ntxoov ntxoo lossis qhov sab ntawm nws daim duab PCB.

4. Solder hauv IC U2 (WS78L09) thiab ntsaws lwm 3 ICs rau hauv lawv cov qhov (socket) uas tsim nyog, ua kom haum qhov thais kom raug.

5. (Xaiv cov kauj ruam) Tshem tawm cov rosin ntws ntau dhau los ntawm cov ntsiab lus solder nrog 95% ethanol (Everclear) lossis 99% isopropanol ua raws tam sim los ntawm cov dej ntxhua dej yaug. Nco ntsoov kom qhuav lub rooj ua kom tiav ua ntej siv.

6. Nws yog. Sib dhos tiav lawm.

Tam sim no rau cov ntaub ntawv acrylic.

Daim ntawv tiv thaiv tev tawm yooj yim yog tias txhua daim tau tsau hauv dej kub li ib feeb lossis ob. Cov khoom tsis tas yuav tsum tau ua ke ua ke. (Kuv tau txuas ob daim ntawv ntev dua rau hauv qab nrog me ntsis acrylic cement). Thaum tag nrho cov tab ntawm sab ib sab tau zaum hauv qhov qhib ntawm cov phaj saum thiab hauv qab plaub qhov ntsia hlau ntev muab yuav tuav txhua yam ua ke.

Qhov luv 3Mx5mm ntsia hlau thiab txiv ntseej tau muab los txuas PCB rau hauv qab phaj ntawm rooj plaub. Cov ntsia hlau tsis ntev txaus. Kuv siv 8mm screws pib, tab sis tom qab ntawd txiav txim siab tsis txuas PCB txhua. Nws haum snugly hauv rooj plaub.

Kuv xaiv tsis tshem daim ntawv tiv thaiv los ntawm cov phaj saum toj ntawm rooj plaub vim tias nws tau luam tawm nrog cov ntawv lo rau lub hwj chim, cov dhia, thiab lub dav hlau dav hlau (daim duab 4).

Daim duab 4. Cov Khoom Sib Sau

Kauj ruam 3: Kev ua haujlwm

Kuv siv lub tshuab AC/DC me me uas muab 12 VDC/500mA los ua lub zog tsim hluav taws xob. Tsis txhob siv dab tsi siab dua kaum tsib volts. Kuv cov khoom siv tuaj nrog ntau zaus jumper teeb tsa rau 50 - 500Hz thiab cov qauv jumper teeb tsa rau SIN. Lwm txoj haujlwm tau cim TAI tab sis kuv xav tias qhov no yog kev sau tsis raug thiab yuav tsum yog TRI rau daim duab peb sab.

Sine yoj

Txuas lub oscilloscope coj mus rau SIN/TAI txoj haujlwm ntawm lub davhlau ya nyob twg thiab teeb tsa lub dav hlau jumper rau SIN. Kuv siv 50-500Hz ntau rau feem ntau ntawm kev ua yeeb yam hauv qab no. Kuv tso tawm sine wave nrog P-P amplitude ntawm ~ 5V thiab zaus ntawm 100Hz siv AMP (R5) thiab FREQ (R4). Koj yuav tsum tau ua si ib puag ncig nrog cov teeb tsa me ntsis kom txog thaum koj tau txais kab ntawm oscilloscope. Kho ob lub trimpots (R2 thiab R3) thiab tom qab ntawd DUTY potentiometer txhawm rau ua kom zoo dua cov duab ntawm sine wave. R2 hloov kho qhov siab tshaj plaws thiab R3 hloov kho qhov siab tshaj hauv qab ntawm sine wave. DUTY (R1) kho sab laug thiab sab xis ntawm txoj kev yoj. Thawj sine yoj kuv tsim tau qhia hauv daim duab 5. Tsis phem heev. Koj tuaj yeem suav suav lub hauv paus txhais tau tias yog qhov ntsuas hluav taws xob yog tias koj nyiam heev.

(Vrms = Vp-p * 0.35355). Nws yog 1.77 volts rau sine wave hauv daim duab 5.

Daim duab 5. Sine Waveform

Txheeb Zaus (yeem)

Qhov ntxiv uas kuv tau ua yog ntsuas qhov siab tshaj plaws thiab yam tsawg kawg uas kuv tuaj yeem tau txais ntawm txhua qhov ntawm cov zaus.

Cov txiaj ntsig tau yog:

5 Hz txog 50Hz ntau: yam tsawg 1Hz, siab tshaj 71Hz

50Hz txog 500Hz ntau yam: yam tsawg kawg 42Hz, siab tshaj 588Hz

500Hz txog 20kHz ntau yam: yam tsawg kawg 227Hz, siab tshaj 22.7kHz

20kHz txog 400kHz ntau yam: yam tsawg kawg, 31kHz, siab tshaj 250kHz

Yam tsawg kawg rau 500Hz txog 20kHz ntau thiab qhov siab tshaj plaws rau 20 txog 400kHz ntau tau tawm los ntawm cov ntawv luam tawm, tab sis feem ntau txhua yam ntxiv yog nyob hauv lub tshav pob.

Daim duab peb sab Wave

Teem lub waveform jumper rau TAI (TRI) thiab txuas lub oscilloscope mus rau TAI/SIN txoj haujlwm ntawm lub davhlau ya nyob twg. Lub tshuab hluav taws xob ua haujlwm tsim lub ntsej muag zoo nkauj daim duab peb sab nrog lub ntsej muag ntse (daim duab 6).

Daim duab 6. Daim duab peb sab Waveform

RAMP (Sawtooth) Yoj

Ib txoj kab rov tav tuaj yeem tau txais los ntawm daim duab peb sab yoj los tig DUTY potentiometer rov qab. Kuv tsis muaj peev xwm tau txais lub nthwv dej ib txwm los ntawm kev tig lub hwj chim lub zog mus rau lwm txoj kev. Lub teeb liab tau ploj los ntawm kev tig lub xov tooj nyob deb dhau, yog li ua rau ntug ntawm nthwv dej tsis tau zoo ib yam, thiab qhov nqis qis ntawm txoj kev taw qhia pom me ntsis sib thooj. Tsis yog cov hniav zoo meej, tab sis nws yog dab tsi (daim duab 7).

Daim duab 7. Ramp (Sawtooth) Waveform

Square Wave

Txuas lub oscilloscope coj mus rau txoj haujlwm nruab nrab ntawm lub davhlau ya nyob twg thaiv cim SQU kom tso tawm ib lub xwmfab yoj (daim duab 8). AMP (R5) thiab OFFSET (R6) potentiometers zoo li tsis muaj kev cuam tshuam rau ntawm lub xwmfab yoj. Qhov hluav taws xob ntawm cov qauv hluav taws xob tau tsim yog hais txog qhov hluav taws xob nkag (12 volts). Kuv yuav tsum tau tshem tawm lub dav hlau jumper tag nrho kom pom tias qhov ntawd txhim kho yam tab sis qhov kev xav tam sim no tuaj rau kuv.

Daim duab 8. Square Waveform

Duty Cycle

Lub luag haujlwm hloov pauv ntawm lub xwmfab yoj tuaj yeem hloov pauv nrog DUTY potentiometer (R1), Tig lub xov tooj rov qab rau lub moos kom luv thiab raws lub moos kom ntev dua lub luag haujlwm. Muaj teeb meem me me nrog DUTY. Hloov pauv lub luag haujlwm tseem yuav hloov pauv me ntsis, yog li nws yuav tsum tau rov kho dua tom qab lub luag haujlwm hloov pauv.

Duty Cycle = feem pua ntawm lub sijhawm nyob rau hauv lub xeev siab faib los ntawm lub sijhawm ntawm cov xwm txheej yoj.

Raws li qhov piv txwv, lub xwmfab hauv daim duab 9 muaj lub sijhawm 10msec thiab nyob hauv lub xeev siab rau 5msec (tseem nyob hauv lub xeev qis rau 5msec).

Yog li, lub voj voog ua haujlwm = (5msec /10msec) *100 = 50%. Cov duab 10 thiab 11 qhia lub luag haujlwm hloov pauv mus rau 60% thiab 40%, feem.

Daim duab 9. Lub voj voog ua haujlwm = 50%

Daim duab 10. Duty Cycle = 60%

Daim duab 11. Lub voj voog ua haujlwm = 40%

Kauj Ruam 4: Nov Yog Txhua Tus, Cov Neeg

Qhov no yog hais txog nws rau Cov Lus Qhia no. Yog tias koj pom nws muaj txiaj ntsig, tawm mus thiab tsim koj tus kheej lub tshuab ua haujlwm lub hnab tshos. Koj tuaj yeem muaj kev lom zem ntau rau 8 lossis 9 USD. Qhov yooj yim Circuit Court kos npe tawm.

Kauj Ruam 5: ILC8038 Cov Khoom Siv Hluav Taws Xob Bill of Materials (BOM)

Resistors

R1 Potentiometer 5kΩ DUTY

R2 Trimpot 100kΩ

R3 Trimpot 100kΩ

R4 Potentiometer 5kΩ FREQ

R5 Potentiometer 50kΩ AMP

R6 Potentiometer 5kΩ OFFSET

R7 Resistor 1kΩ

R8 Resistor 1kΩ

R9 Resistor 10kΩ

R10 Resistor 10kΩ

R11 Resistor 4.7kΩ

R12 Resistor 30kΩ

R13 Resistor 10kΩ

R14 Resistor 4.7kΩ

R15 Resistor 10kΩ

R16 Resistor 10kΩ

Kev Sib Koom Ua Ke

U1 ICL8038 CCPD Precision Waveform Generator

U2 WS 78L09 Tus Tswj Hluav Taws Xob Zoo

U3 18MDSHY TL082CP JFET-Kev Tawm Tswv Yim Ua Haujlwm Amplifier

U4 7660S CPAZ Voltage Converter

Capacitors

C1 Ceramic 100nF

C2 Ceramic 100nF

C3 Ceramic 100pF

C4 Ceramic 2.2nF

C5 Ceramic 100nF

C6 Ceramic 1µF

C7 Ceramic 100nF

C8 Ceramic 100nF

C9 Ceramic 100nF

C10 Electrolytic 100µF

C11 Electrolytic 10µF

C12 Electrolytic 10µF

Jack, Jumpers, thiab Terminal

JK1 Barrel Jack

JP1 2 txoj haujlwm jumper thaiv TAI (TRI), SIN

JP2 4 txoj hauj lwm jumper thaiv 5-50Hz, 50-500Hz, 500Hz-20kHz, 20kHz-400kHz

JP3 3 txoj haujlwm davhlau ya nyob twg thaiv GND, SQU, SIN/TAI (TRI)