Ngā Tohutohu mō te Hanga i tētahi Reo Irirangi me ngā Arahiko Matatau
He kaupapa hikohiko ngahau, he kaupapa wero hoki te hanga i tō ake reo irirangi. I mua, he rite tonu ngā reo irirangi ki ngā ara iahiko māmā e hangai ana ki te transistor me ngā wāhanga anaro, i ēnei rā ka taea e koe te hanga reo irirangi me ngā "ara iahiko matatau" e whakakotahi ana i ngā kōwae RF hou, ngā pūmana iti, te tukatuka tohu mamati (DSP), me ngā āhuatanga atamai pēnei i ngā whakaaturanga, te rokiroki kua whakaritea, me te hononga ahokore. Ka kapi i tēnei tuhinga ngā tohutohu nui mō te hoahoa me te hanga i tētahi reo irirangi hou—ahakoa he reo irirangi FM, he kaiwhiwhi AM māmā, he reo irirangi mamati rānei e hangai ana ki tētahi kōwae kua rite ki te whakamahi—kia pai ai te pumau, te mārama, me te ngāwari ki te whakamahi.
1. Whakatauhia te momo reo irirangi e hiahia ana koe ki te hanga.
Ko te taahiraa tuatahi ko te whakatau i tāu whāinga: he reo irirangi FM anaro, he reo irirangi FM me te DSP, he kaiwhiwhi reo irirangi ipurangi rānei. He rerekē te taumata uaua o ia momo.
– Te reo irirangi FM e hangai ana ki tētahi kōwae whakahāngai DSP: He pai mō ngā kaiwhakamahi tīmata ki ngā kaiwhakamahi waenga. Ka taea e koe te whakamahi i ngā kōwae pēnei i te Si4703, RDA5807, TEA5767 rānei, kua whai PLL, he demodulator, me te whakakaha ā-roto.
– SDR (Reo Irirangi Kua Tautuhia e te Pūmanawa): He pai mō ngā kaiwhakamahi matatau. Ka whakamahi i te tukatuka RF me te tukatuka mamati (hei tauira, RTL-SDR, i tētahi maramara motuhake rānei) mō te matawai ngāwari o ngā auau maha.
– Reo irirangi ipurangi: E whakamahi ana i te ESP32/ESP8266 mō te rere oro; ehara i te reo irirangi RF, engari he "reo irirangi" tonu i roto i te ariā kaiwhiwhi pāho.
Mā te whakatau i te momo reo irirangi ka āwhina i a koe ki te whiriwhiri i ngā wāhanga e tika ana, ngā whakaritenga mana, me te hoahoa pūihi me te whakakaha oro.
2. Whakamahia he Module Tuner Hou mō te Pūmautanga me te Whakangāwari
Ko tētahi o ngā "ara iahiko matatau" tino whai hua ko te waeine whakahāngai reo irirangi DSP. He tino pumau ake tēnei momo waeine i ngā ara iahiko RF anaro tuku iho nā te mea kei roto he raka auau (PLL) me ngā tātari ā-roto.
Ngā tohutohu mō te whiriwhiri i tētahi waeine whakahāngai:
– Kia tino tautokona e te kōwae te awhe auau e hiahiatia ana e koe (hei tauira, FM 87,5–108 MHz).
– Kōwhiria he kōwae me te atanga I2C hei whakahaere ngāwari i te pūmana iti.
– Tirohia te kounga o te putanga oro (mono/stereo) me te hiahia mō ētahi atu ara iahiko pēnei i ngā pūnga honohono.
Mā te kōwae whakahāngai DSP, ka taea e koe te arotahi ki ngā āhuatanga whakarei ake: te whakaatu auau, te rokiroki hongere, te matawai-aunoa, me te hoahoa oro.
3. Whakauruhia te Pūmanaiti mō ngā Āhuatanga Atamai
He "roro" whakahaere tonu tā ngā reo irirangi hou. Ka taea te whakamahi i ngā pūmana iti pēnei i a Arduino, ESP32, STM32 rānei ki te:
– Whakatakotoria te auau o te kaiwhakatakoto whakaaro mā te I2C
– Tiakina ngā tautuhinga kua whakaritea ki roto i te EEPROM/flash
– Waihangahia he āhuatanga rapu aunoa (rapu aunoa)
– E whakaatu ana i ngā mōhiohio i runga i te OLED/LCD
– Pānuihia ngā pātene, ngā waehere hurihuri, te tāuru pā rānei
– Whakahaere i te rōrahi mamati, i te potentiometer hiko rānei
Ngā tohutohu nui:
– Whakamahia te pūreretā hurihuri hei whakahāngai kia rite ki te reo irirangi arumoni.
– Tāpirihia ngā pātene “tautuhinga 1–5” hei uru tere.
– Me whakarite kei ngā aho I2C ngā ātete kukume-ake e tika ana mēnā kāore i te whakaratohia e te kōwae.
Mā te whakamahi i tētahi pūmana iti, ka nui ake te taunekeneke me te tika o tō reo irirangi.
4. Hoahoahia he Pūnaha Hiko Ma, Pūmau hoki
Ko te āhuatanga e warewarehia ana i roto i te huihuinga reo irirangi ko te kounga o te pūhiko. He tino tairongo ngā reo irirangi—ina koa ko ngā wāhanga RF me te oro—ki te haruru.
Ētahi tohutohu mō te pūhiko hiko:
– Whakamahia he kaiwhakahaere haruru iti (LDO) mō te wāhanga RF i ngā wā katoa e taea ai.
– Wehea ngā aho hiko RF me ngā aho hiko oro mai i te kawenga matihiko (te pūmana iti, te whakaaturanga) kia kore ai e pokanoa tetahi ki tetahi.
– Tāpirihia he pūnga wetewete tata ki ia IC (hei tauira, 100 nF + 10 µF).
– Mena kei te whakamahi koe i tētahi urutau whakawhiti, whakaratohia he tātari tāpiri (LC, he titi ferrite rānei) hei whakaiti i te ngaru.
Mā te pūtake hiko pai ka whakaiti i te ngunguru, te haruru whiowhio, me te pokanoa ina kā te mata.
5. Kia aro ki te whenua me te tahora PCB
I roto i te reo irirangi, he mea nui ake te tahora i te hoahoa. Mena kei te hanga koe i tō ake PCB, kei te hanga rānei i runga i tētahi papa tauira, whakaarohia ēnei e whai ake nei:
– Whakamahia he papa whenua ina hanga ana i tētahi PCB.
– Whakaitihia ngā koropiko whenua i te ara oro.
– Puritia ngā aho RF kia matara atu i ngā aho matihiko tere-rahi.
– Whakatakotoria te waeine whakahāngai me ngā wāhanga RF ki te taha o te pūihi, ā, karohia ngā taura roa.
– Ki te whakamahi koe i tētahi papa taro, kia rite mō ngā taumata haruru teitei ake; mō te mahi pai rawa atu, whakamahia he PCB, he papa perf rānei he poto ngā waea.
Ka poto ake, ka ma ake te ara, ka iti ake te pokanoa e tomo mai.
6. Kōwhiria te Antenna Tika, ā, Whakatikatikahia te Ārai
Ko te pūihi te "wāhi tomo" mō ngā tohu reo irirangi. Ahakoa he reo irirangi pai, engari he pūihi kino, ka ngoikore tonu te whiwhinga oro.
Ngā tohutohu mō te pūihi FM:
– Whakamahia he pūihi waea 75 cm te roa (tata ki te hauwhā ngaru FM) hei otinga māmā.
– Mō ngā hua pai ake, whakamahia he pūihi karu, he pūihi dipole rānei.
– Whakatakotoria te pūihi kia matara atu i ngā pūtake haruru: ngā rihi utu iti, ngā motuka DC, me ngā mata nui.
Ki te hiahia koe ki te whakapiki ake i tō aro, whakaarohia he ara iahiko taurite māmā, whakamahia rānei te tāuru pūihi e taunakitia ana e te waeine whakahāngai.
7. Whakapai ake i te Kounga Ororongo me te Whakakaha Pai
He iti te taumata o te tohu oro mai i te kaiwhakaara, ā, me whakanui. Mō te tangi reo irirangi pakari, whakamahia he whakakaha reo whai hua, marino hoki.
Ngā kōwhiringa rongonui:
– Ngā whakakaha oro Akomanga D pērā i te PAM8403 (mō ngā kaikorero iti, penapena hiko)
– he whakakaha IC pērā i te LM386 (he māmā, engari he haruru ake i te akomanga D o ēnei rā)
– Whakakaha me te mana oro mamati mō te wheako kaiwhakamahi pai ake
Ngā tohutohu ororongo:
– Whakamahia ngā pūnga honohono kia rite ki ngā taunakitanga o te pepa raraunga hei ārai i te ngaronga o te oro papaku.
– Wehea te whenua ororongo mai i te whenua matihiko mēnā e tika ana (whenua whetu).
– Tāpirihia he tātari māmā hei ārai i te haruru PWM mai i te whakakaha akomanga D kei uru ki te pūnaha.
Ki te tāpirihia e koe he whakaōrite oro mamati, he whakahaere oro rānei, kia tino mohio kāore e nui rawa te haruru.
8. Tāpirihia he Whakaaturanga me he Atanga Whakamarie
Ehara i te mea ko te whiwhi pāhotanga anake te mea e hiahiatia ana e te reo irirangi hangarau-teitei, engari ko te wheako kaiwhakamahi anō hoki. Ka taea e koe te tāpiri:
– 0.96” OLED hei whakaatu i te auau, te kaha o te tohu, te aratau stereo/mono
– LCD 16×2 mō te whakaaturanga māmā me te utu iti
– Pae tohu, tohu taumata oro rānei
Whakamahia ngā tahua māmā: te whakahāngai, te rapu, ngā tautuhinga oro, me ngā tautuhinga oro. Nā te atanga hoahoa pai ka rite te reo irirangi kua huihuia ki tētahi hua ngaio.
9. Whakaarohia ngā Āhuatanga Tāpiri: Nihokikorangi, Pūreretā, Karaka Mamati rānei
Ki te hiahia koe ki te whakanui ake i te taumata o te kaupapa, anei ngā āhuatanga ka taea te tāpiri:
– He kaiwhiwhi oro Nihokikorangi kia taea ai e te reo irirangi te noho hei kaikorero Nihokikorangi
– Kōwae RTC (Karaka Wā Tūturu) mō te karaka me te whakaoho
– Te rokiroki o ngā tautuhinga me ngā tautuhinga i roto i te mahara kore-rerekē
– Te tuhi pāpāho (me whakamahi kāri ADC me te SD hei rokiroki, he uaua ake)
Kia tino mohio kei whakararuraru ngā āhuatanga tāpiri i te haruru RF. Ka taea e ngā kōwae Nihokikorangi me ngā kōwae kāri SD te whakararuraru, nō reira he mea nui te whakatakotoranga me te tātari tika.
10. Te Whakamātautau me te Whakatau Rapanga i te Hipanga-i-te-Hipanga mā te Tikanga Tika
He hapa noa te ngana ki te huihui i ngā mea katoa i te wā kotahi, kātahi ka pōhēhē ina kore e mahi. Whakamātauria he whakamātautau taahiraa-i-te-taahiraa:
1. Whakamātauria te pūtake hiko (ngaohiko tika, riu iti)
2. Whakamātauria te pūmana iti me te matawai I2C (mēnā kua kitea te waeine whakahāngai)
3. Whakamātauria te pūoro me te auau kaha i tō rohe.
4. Whakamātauria te ara iahiko oro mā te whakamahi i te tohu whakamātautau, i te putanga whakaōrite rānei.
5. Tāutahia noa te whakaaturanga, ngā pātene, me ngā āhuatanga tāpiri
Ki te haruru te oro, ngana:
– Whakakapia te urutau hiko
– Tāpirihia he pūnga me te titi ferrite
– Whakapotohia ngā taura whenua me ngā taura ororongo
– Puritia te pūihi kia matara atu i te wae matihiko
Te Katinga
Ko te hanga i tētahi reo irirangi me ngā ara iahiko matatau he whakakotahitanga o te māramatanga RF, te hoahoa hiko, te tahora ara iahiko, me te hōtaka moroiti. Mā te kōwae whakahāngai DSP, ka taea e koe te whakatutuki i te whiwhinga pumau me ngā āhuatanga hou me te ngāwari. Ko te kī ki te angitu ko te whakahaere i ngā taipitopito "kāore e kitea" pērā i te whenua, te tātari, me te tahora. Kia pai te oma o tō reo irirangi taketake, tāpirihia ngā āhuatanga pērā i te whakaaturanga, ngā tautuhinga kua whakaritea, te Nihokikorangi, te karaka mamati rānei kia pai ake ai te ahua o tō kaupapa.
Ki te hiahia koe, ka taea hoki e au te āwhina i a koe ki te waihanga i tētahi rārangi wāhanga (BOM) me ngā tauira ara iahiko poraka e ai ki te momo reo irirangi e whiriwhiria ana e koe (FM DSP, SDR, reo irirangi ipurangi rānei), me ngā taunakitanga mō ngā kōwae e ngāwari ana te kitea i te mākete.
