Malangizo Opangira Wailesi Yokhala ndi Ma Circuits Apamwamba
Kupanga wailesi yanuyanu ndi ntchito yosangalatsa komanso yovuta yamagetsi. Ngakhale kuti ma wailesi kale ankafanana ndi ma circuits osavuta okhala ndi transistor ndi zigawo za analog, masiku ano mutha kupanga ma wailesi okhala ndi "ma circuits apamwamba" omwe amaphatikiza ma RF modules amakono, ma microcontrollers, digital signal processing (DSP), ndi zinthu zanzeru monga zowonetsera, malo osungiramo zinthu, ndi kulumikizana opanda zingwe. Nkhaniyi ifotokoza malangizo ofunikira popanga ndikumanga wailesi yamakono—kaya ndi wailesi ya FM, cholandirira cha AM chosavuta, kapena wailesi ya digito yochokera pa module yokonzeka kugwiritsidwa ntchito—kuti muwonetsetse kuti zotsatira zake ndi zokhazikika, zomveka bwino, komanso zosavuta kugwiritsa ntchito.
1. Dziwani mtundu wa wailesi yomwe mukufuna kupanga.
Gawo loyamba ndikudziwa cholinga chanu: wailesi ya analogi ya FM, wailesi ya FM yokhala ndi DSP, kapena wailesi yolandirira pa intaneti. Mtundu uliwonse umafuna mulingo wosiyana wa zovuta.
– Wailesi ya FM yochokera pa module ya DSP tuner: Yoyenera ogwiritsa ntchito oyamba kumene mpaka apakatikati. Mutha kugwiritsa ntchito ma module monga Si4703, RDA5807, kapena TEA5767, omwe ali kale ndi PLL, demodulator, ndi amplifier yamkati.
– SDR (Software Defined Radio): Yoyenera ogwiritsa ntchito apamwamba. Imagwiritsa ntchito RF front-end ndi digito processing (monga RTL-SDR kapena chip yapadera) kuti ipange ma frequency angapo mosavuta.
– Wailesi ya pa intaneti: Imagwiritsa ntchito ESP32/ESP8266 pofalitsa mawu; osati wailesi ya RF, koma ikadali "wailesi" mu lingaliro la wolandila wailesi.
Kudziwa mtundu wa wailesi kumakuthandizani kusankha zigawo zoyenera, mphamvu zomwe zimafunika, komanso kapangidwe ka antenna ndi mawu okulitsa.
2. Gwiritsani ntchito Module Yamakono Yosinthira Zinthu Kuti Zikhale Zokhazikika komanso Zosavuta
Chimodzi mwa "ma circuits apamwamba" othandiza kwambiri ndi DSP radio tuner module. Mtundu uwu wa module ndi wokhazikika kwambiri kuposa ma circuits a RF a analog chifukwa umaphatikizapo frequency lock (PLL) ndi ma filters amkati.
Malangizo posankha gawo losinthira:
- Onetsetsani kuti gawoli likuthandiza ma frequency omwe mukufuna (monga FM 87,5–108 MHz).
- Sankhani gawo lokhala ndi mawonekedwe a I2C kuti muzitha kulamulira mosavuta microcontroller.
- Yang'anani mtundu wa mawu otuluka (mono/stereo) ndi kufunikira kwa ma circuits owonjezera monga ma coupling capacitors.
Ndi gawo la DSP tuner, mutha kuyang'ana kwambiri pazinthu zowonjezera: kuwonetsa pafupipafupi, kusungira njira, kusanthula zokha, ndi kapangidwe ka mawu.
3. Phatikizani Microcontroller kuti mupeze Zinthu Zanzeru
Ma wailesi amakono nthawi zambiri amakhala ndi "ubongo" wowongolera. Ma microcontrollers monga Arduino, ESP32, kapena STM32 angagwiritsidwe ntchito ku:
- Khazikitsani ma frequency a tuner kudzera mu I2C
- Sungani zokonzedweratu mu EEPROM/flash
- Pangani njira yopezera zinthu zokha (kufufuza zokha)
- Imawonetsa zambiri pa OLED/LCD
- Werengani mabatani, ma encoder ozungulira, kapena kukhudza zolowetsa
- Sinthani voliyumu ya digito kapena potentiometer yamagetsi
Malangizo ofunikira:
- Gwiritsani ntchito cholembera chozungulira kuti chizimveke ngati wailesi yamalonda.
- Onjezani mabatani a "preset 1-5" kuti muwafikire mwachangu.
- Onetsetsani kuti mizere ya I2C ili ndi zotsukira zoyenera ngati gawo silikupereka.
Ndi microcontroller, wailesi yanu imakhala yolumikizana bwino komanso yolondola.
4. Pangani Mphamvu Yoyera Komanso Yokhazikika
Mbali yomwe nthawi zambiri imaiwalika pokonza wailesi ndi mtundu wa magetsi. Ma wailesi—makamaka RF ndi zigawo za mawu—amamva phokoso kwambiri.
Malangizo ena okhudza magetsi:
- Gwiritsani ntchito chowongolera phokoso lotsika (LDO) pa gawo la RF nthawi iliyonse ikatheka.
- Patulani mawaya amagetsi a RF ndi audio kuchokera ku digito (microcontroller, display) kuti asasokoneze wina ndi mnzake.
- Onjezani capacitor yolumikizira pafupi ndi IC iliyonse (monga 100 nF + 10 µF).
- Ngati mukugwiritsa ntchito adaputala yosinthira, perekani fyuluta yowonjezera (LC kapena ferrite bead) kuti muchepetse kugwedezeka.
Mphamvu yabwino imachepetsa phokoso, phokoso lofuula, ndi kusokoneza pamene chinsalucho chikuyatsidwa.
5. Samalani ndi kukhazikika pansi ndi kapangidwe ka PCB
Mu wailesi, kapangidwe kake nthawi zambiri kamakhala kofunikira kwambiri kuposa kapangidwe kake. Ngati mukumanga PCB yanu kapena nyumba yanu pa protoboard, ganizirani izi:
- Gwiritsani ntchito pulani yapansi popanga PCB.
- Chepetsani kuzungulira kwa nthaka munjira yamawu.
- Sungani mizere ya RF kutali ndi mizere ya digito yothamanga kwambiri.
- Ikani gawo lotulutsira ndi zigawo za RF pafupi ndi antenna, ndipo pewani zingwe zazitali.
- Ngati mukugwiritsa ntchito bolodi lopangira mkate, konzekerani phokoso lalikulu; kuti mugwire bwino ntchito, gwiritsani ntchito PCB kapena bolodi lopaka utoto wokhala ndi waya waufupi.
Njirayo ikakhala yoyera komanso yaifupi, kusokonezana sikudzalowa.
6. Sankhani Antena Yoyenera ndi Kusintha Impedance
Antena ndiye "malo olowera" ma siginecha a wailesi. Wailesi yabwino yokhala ndi antena yoyipa idzakhalabe yosalandira bwino.
Malangizo a Antena a FM:
- Gwiritsani ntchito antenna ya waya ya 75 cm (pafupifupi kotala la mafunde a FM) ngati yankho losavuta.
- Kuti mupeze zotsatira zabwino, gwiritsani ntchito antenna ya telescopic kapena antenna ya dipole.
- Ikani antenna kutali ndi malo osowetsa phokoso: ma charger otsika mtengo, ma DC motors, ndi ma screen akuluakulu.
Ngati mukufuna kukhala wozama kwambiri, ganizirani za dera losavuta lofananira kapena gwiritsani ntchito input ya antenna yomwe ikulangizidwa ndi gawo la tuner.
7. Sinthani Ubwino wa Ma Audio ndi Chokulitsa Ma Amplifera Chabwino
Chizindikiro cha mawu kuchokera ku chotulutsira mawu nthawi zambiri chimakhala chotsika ndipo chimafuna kukulitsidwa. Kuti mumve mawu olimba a wailesi, gwiritsani ntchito amplifier yogwira ntchito bwino komanso yopanda phokoso.
Zosankha zodziwika bwino:
- Ma amplifiers a Class D monga PAM8403 (a ma speaker ang'onoang'ono, osawononga mphamvu)
- Chowonjezera cha IC monga LM386 (chosavuta, koma chomveka bwino kuposa kalasi ya D yamakono)
- Amplifier yokhala ndi digito voliyumu yowongolera kuti ogwiritsa ntchito azikhala aukhondo
Malangizo a Audio:
- Gwiritsani ntchito ma capacitor olumikizirana motsatira malangizo a datasheet kuti mupewe kutayika kwa bass.
- Siyanitsani mawu omveka ndi mawu a digito ngati pakufunika kutero (nyenyezi).
- Onjezani fyuluta yosavuta kuti mupewe phokoso la PWM kuchokera ku amplifier ya kalasi D kuti isalowe mu dongosolo.
Ngati muwonjezera choyezera cha digito kapena chowongolera mawu, onetsetsani kuti sichikuwonjezera phokoso lochuluka.
8. Onjezani Chiwonetsero Chosavuta ndi Chiyanjano
Wailesi yapamwamba si yongolandira mauthenga okha, komanso yokhudza momwe wogwiritsa ntchito amagwirira ntchito. Mutha kuwonjezera:
– 0.96” OLED kuti iwonetse pafupipafupi, mphamvu ya chizindikiro, mawonekedwe a stereo/mono
- LCD ya 16×2 kuti iwonetsedwe mosavuta komanso motsika mtengo
- Chizindikiro cha chizindikiro kapena chizindikiro cha mulingo wa mawu
Gwiritsani ntchito menyu yosavuta: kusintha, kufunafuna, kukonza zinthu, ndi makonda a voliyumu. Mawonekedwe opangidwa bwino amapangitsa wailesi yosonkhanitsidwayo kumveka ngati chinthu chaukadaulo.
9. Ganizirani Zina Zowonjezera: Bluetooth, Recorder, kapena Digital Clock
Ngati mukufuna kuwonjezera kuchuluka kwa polojekitiyi, nazi zinthu zomwe zingawonjezedwe:
- Cholandirira mawu cha Bluetooth kotero kuti wailesi ikhozanso kukhala cholankhulira cha Bluetooth
- Gawo la RTC (Real Time Clock) la wotchi ndi alamu
- Kusunga zinthu zomwe zakonzedweratu ndi zoikamo mu kukumbukira kosasinthasintha
- Kujambula pa wailesi (kumafuna kusungirako ADC ndi khadi la SD, zovuta kwambiri)
Onetsetsani kuti zinthu zina sizikusokoneza phokoso la RF. Ma module a Bluetooth ndi SD card angayambitse kusokoneza, kotero kukonza bwino ndi kusefa ndikofunikira.
10. Kuyesa ndi Kuthetsa Mavuto Pang'onopang'ono Pogwiritsa Ntchito Njira Yolondola
Cholakwika chofala kwambiri ndi kuyesa kusonkhanitsa chilichonse nthawi imodzi, kenako n’kusokonezeka ngati sichikugwira ntchito. Chitani mayeso pang’onopang’ono:
1. Yesani magetsi (voltage yolondola, ripple yochepa)
2. Yesani microcontroller ndi I2C scanner (ngati gawo la tuner lapezeka)
3. Yesani chochuniracho ndi ma frequency amphamvu m'dera lanu.
4. Yesani dera la mawu pogwiritsa ntchito chizindikiro choyesera kapena chotulutsira chotulutsira mawu.
5. Ingoyikani chowonetsera, mabatani, ndi zina zowonjezera
Ngati mawuwo ali ndi phokoso, yesani:
- Sinthani adaputala yamagetsi
- Onjezani capacitor ndi ferrite bead
- Kuchepetsa zingwe zapansi ndi zomvera
- Sungani antenna kutali ndi gawo la digito
Kutseka
Kupanga wailesi yokhala ndi ma circuitry apamwamba ndi kuphatikiza kumvetsetsa kwa RF, kapangidwe ka magetsi, kapangidwe ka ma circuit, ndi mapulogalamu a microcontroller. Ndi DSP tuner module, mutha kupeza njira zolandirira bwino komanso zamakono mosavuta. Chinsinsi cha kupambana ndikudziletsa pazinthu "zosawoneka" monga kuyika pansi, kusefa, ndi kapangidwe. Radio yanu yoyambira ikayamba kuyenda bwino, onjezani zinthu monga chiwonetsero, zokonzedweratu, Bluetooth, kapena wotchi ya digito kuti pulojekiti yanu izioneka ngati yapamwamba kwambiri.
Ngati mukufuna, ndingakuthandizeninso kupanga mndandanda wa zigawo (BOM) ndi zitsanzo za ma block circuit malinga ndi mtundu wa wailesi yomwe mwasankha (FM DSP, SDR, kapena wailesi ya pa intaneti), yokhala ndi malangizo a ma module omwe ndi osavuta kupeza pamsika.
