Me pēhea te hanga i tētahi reo irirangi me te kaha ki te whiwhi i ngā auau maha
Ko te reo irirangi tētahi o ngā taputapu hiko tino whakamīharo hei ako mā te mea e whakakotahi ana i ngā ariā taketake o te hiko, ngā ngaru hikohiko, me te tukatuka tohu. Ahakoa i tēnei ao matihiko, kei te whai tikanga tonu te reo irirangi—ehara i te mea mō te whakangahau anake, engari mō ngā whakawhitiwhiti kōrero ohorere, te ako hikohiko, me ngā whakamātautau whakangahau. Ka matapakihia e tēnei tuhinga te hanga i tētahi reo irirangi ka taea te whiwhi i te whānuitanga o ngā auau, inā koa i roto i ngā roopu AM me te FM, me tētahi huarahi pono e tika ana mō ngā tīmatanga ki ngā taumata waenga.
1. Te Mārama ki ngā "Auau Rerekē" i te Reo Irirangi
I mua i te tīmatanga o te huihuinga, he mea nui kia mārama ki te tikanga o te "whiwhi i te whānuitanga o ngā auau". Ko ngā reo irirangi te tikanga ka hopu i ngā tohu mai i tētahi whānuitanga auau motuhake, i runga i te hoahoa o te waeine me te ara iahiko. Ko ētahi tauira o ngā whānuitanga noa:
– AM (Whakarerekētanga Amplitude): tata ki te 520–1710 kHz (ngaru waenga/MW)
– FM (Whakarerekētanga Auau): tata ki te 88–108 MHz (pāhotanga FM)
– SW (Ngaru Poto): tata ki te 3–30 MHz (he maha ngā momo roopu)
– Airband (whakawhitiwhiti kōrero rererangi): 118–136 MHz (te nuinga o te wā he AM)
– VHF/UHF Amateur: rerekē, hei tauira 144–148 MHz, 430–440 MHz rānei
Mō tētahi kaupapa DIY haumaru, whai hua hoki mō ngā wāhanga, ko te huarahi tino whaihua ko te hanga i tētahi reo irirangi i runga i tētahi waeine kaiwhiwhi kua oti te hanga, kua whai IC whakahāngai me te tango oro, kia kore ai koe e hiahia ki te hoahoa i tētahi wāhanga RF uaua mai i te tīmatanga.
2. Whakatauhia te Huarahi Hanga
E rua ngā huarahi matua:
1. Reo irirangi anaro tawhito (whakatika LC + whakakaha + whakawehe oro): he mea ngahau ki te ako, engari he uaua ki te hanga kia pumau, inā koa mō te maha o ngā roopu oro.
2. Reo irirangi e hangai ana ki te tūhono IC/kōwae mamati: he māmā ake, he pumau ake, ā, ka taea te kapi i ngā auau maha (AM/FM tae atu ki te SW) i runga i te kōwae.
Mō te kaupapa o te "whiwhi i ngā auau maha", he pai ake te whakamahi i te huarahi tuarua.
3. Kōwhiringa Pūhara: Wāhanga Reo Irirangi Maha-roopu
Ko ētahi kōwae/IC rongonui mō ngā kaupapa reo irirangi maha-rohe:
– Si4732/Si4735 (Silicon Labs): ka taea te whiwhi i te FM, AM (MW), me te SW (ngaru poto). He maha ngā kōwae pakaru kua rite ki te whakamahi e wātea ana.
– TEA5767 / RDA5807: he FM anake te nuinga, he pai mēnā ko te FM kounga pai anake te mea e hiahiatia ana e koe.
– RTL-SDR (Reo Irirangi Kua Tautuhia e te Pūmanawa): he tino ngāwari, ka taea te whiwhi i te whānuitanga auau whānui (i runga i te dongle), engari me whakamahi rorohiko/waea pūkoro me te tukatuka mamati.
Ki te hiahia koe ki tētahi reo irirangi whānui, ko te RTL-SDR te mea tino ngāwari, engari he rite tōna hoahoa ki tētahi reo irirangi e ahu mai ana i te pūmanawa. Ki te hiahia koe ki tētahi taputapu takitahi māmā, ko te kōwae Si4732/Si4735 te kōwhiringa pai rawa atu.
I roto i tēnei tuhinga, ko tā mātou arotahi ko te hanga i tētahi reo irirangi maha-roopu mā te whakamahi i te Si4732/Si4735 nā te mea he tino māmā, he iti te utu, ā, kāore e hiahiatia he rorohiko.
4. Ngā Wāhanga e Hiahiatia ana
Anei te rārangi o ngā wāhanga noa mō te reo irirangi maha-roopu e hangai ana ki te Si4732/Si4735:
1. Kōwae Si4732/Si4735 (papa pakaru e tautoko ana i te AM/FM/SW)
2. Pūmana iti (hei tauira, Arduino Nano/Uno, ESP32, STM32 rānei)
3. Mata (kāore he whiringa engari he tino āwhina):
– OLED 0.96” I2C (SSD1306), LCD 16×2 rānei
4. Whakakaha oro:
– PAM8403 (3W) LM386 rānei (he mea tawhito ake) te kōwae
5. Ngā kaikorero 4–8 ohms (1–3 watts)
6. Pūihi:
– Mō te FM: taura 70–75 cm (hei pūihi māmā)
– Mō te AM/SW: he pūihi waea roa ake (he pai ake te 5–10 mita mō te SW)
7. Pūwhakamātautau hurihuri + porowhita mō te whakahāngai ngāwari (whiringa)
8. Pūnaha hiko:
– 5V (ka taea te tiki mai i te pākahiko + te pikinga hiko, te pēke hiko, te urutau rānei)
9. Ngā wāhanga tautoko:
– Ngā taura pekepeke, papa taro/papa-whakakotahi, pūnga wetewete (100 nF), pūmana rōrahi, pana.
5. Hoahoa Poraka Pūnaha
He māmā noa te hanganga o te pūnaha:
Pūihi → Kōwae Si473x (tuner + demo) → Putanga oro → Whakakaha oro → Kaikōrero
Ā, mō te whakahaere:
Pūmana iti → I2C/SPI → Kōwae Si473x + Whakaaturanga + Tāuru Pātene/Waehere
Ko te tikanga ka whakahaerehia ngā kōwae Si473x mā te I2C, nō reira ehara i te mea uaua te waea.
6. Ngā Hipanga Huihuinga Taputapu
A. Te hono i te Module Si473x ki te Microcontroller
Ko te hononga I2C noa ko:
– Kōwae VCC → 3.3V, 5V rānei (whai i ngā whakaritenga mō te kōwae)
– GND → GND
– SDA → Arduino SDA (A4 i runga i te Uno/Nano)
– SCL → SCL Arduino (A5 i runga i te Uno/Nano)
Me tautuhi anō, me whakahohe rānei te pine o ētahi kōwae. Tirohia te pepa raraunga o tō kōwae me ngā tauira waea a te kaihoko.
B. Te Tāuta i te Mata OLED (Whiringa)
– VCC → 5V
– GND → GND
– Ngā Rauemi Taiao → Ngā Rauemi Taiao
– SCL → SCL
Ka taea e ngā waeine OLED me ngā waeine reo irirangi te whakamahi tahi i ngā aho I2C, mena he rerekē ngā wāhitau.
C. Te Hononga Ororongo ki te Whakakaha me ngā Kaikōrero
– Ororongo mai i Si473x → Tāurunga kōwae PAM8403/LM386
– Putanga whakakaha → kaikorero
– Tāpirihia he potentiometer ki te tāuru, ki te putanga rānei o te whakakaha oro hei whakahaere i te oro.
Kia tūpato ki te whenua: me ātaahua te taura oro GND kia kore ai e haruru.
D. Pūihi
– Mō te FM, tāpirihia he taura e 70 cm te roa ki te pine pūihi FM (ki te papa pūihi rānei i runga i te kōwae).
– Mō te AM/SW, whakamahia he pūihi waea roa ake. Ka roa ake, ka teitei ake hoki te pūihi, ka pai ake te whiwhinga SW.
7. Te Whakatakotoranga Hōtaka me te Whakatūnga Arorau
Kia taea ai e te reo irirangi te "whiwhi i ngā auau maha", me hiahia koe ki tētahi pūmanawa ka taea te:
1. Kōwhiria te aratau: FM / AM / SW
2. Whakatikatikahia te auau (whakatikatika) kia rite ki ngā waeine:
– Ko te FM he 50/100 kHz te taahiraa i te nuinga o te wā
– AM/MW te tikanga 9/10 kHz
– Ka taea te SW ki te 1–5 kHz (i runga i ngā hiahia)
3. Whakaatuhia ngā mōhiohio:
– Auautanga o nāianei
– RSSI / kaha tohu
– Aratau roopu
Mō Arduino, he whare pukapuka hapori kei te wātea mō te Si4735. He māmā noa iho:
– Tāutahia te whare pukapuka mā te Kaiwhakahaere Whare Pukapuka, mā GitHub rānei
– Whakamahia te tauira waehere “reo irirangi FM/AM/SW”
– Whakarerekētia ngā tāurunga whakahāngai (ngā pātene whakarunga/whakararo, te encoder hurihuri)
– Tāpirihia he atanga tahua hei whakawhiti i ngā roopu
Ki te whakamahi koe i te ESP32, ka taea hoki e koe te tāpiri i ngā āhuatanga hou pēnei i:
– te rokiroki o mua o te teihana,
– Mana whakahaere Wi-Fi mō te atanga tukutuku māmā,
– te whakatūnga aunoa (matawai teihana).
8. Te Whakatikatika, te Whakamātautau, me te Arotau
A. Te wikitoria i ngā pāhotanga kāore i whiwhihia
– Tirohia te pūihi me te ahunga tāutanga.
– Puritia te ara iahiko kia matara atu i ngā pūtake haruru: ngā rihi utu iti, ngā motuka DC, ētahi rama LED.
– Whakamātauria te whakamahi i tētahi pēke hiko hei pūtake hiko hei whakaiti i te ngaru o te urutau.
B. Te Whakaiti i te Haruru me te Haruru
– Tāpirihia he pūnga 100 nF ki te taha o te VCC o te waeine reo irirangi me te whakakaha oro.
– Whakamahia ngā whakatakotoranga taura poto mō ngā aho oro.
– Wehea ngā aho hiko o te whakakaha oro mai i ngā aho I2C mēnā ka taea.
C. Te Whakanui i ngā Āheinga "Maha-Auautanga"
– Kōwhiria he roopu SW (hei tauira, 3–5 MHz, 5–7 MHz, 7–10 MHz, me ētahi atu) kia pai ake ai te whakaōrite.
– Tāpirihia te pātene “taahiraa” hei whakarerekē i ngā taahiraa whakarārangi (1 kHz, 5 kHz, 10 kHz).
– Tāpirihia te āhuatanga “rapu” me te āhuatanga “matawai” rānei.
9. Whakapai ake i te Āpitihanga kia Ngaio
Kia oti te mahi a te ara iahiko, whakapaipaihia te kaupapa ki te anga:
– Whakamahia he pouaka kaupapa kirihou, he pouaka tānga 3D rānei.
– Me whakarite he kōhao/pūhau whakapūoro kei mua o te kaikorero.
– Hangaia he pūihi o waho (hononga) kia taea ai te whakakapi ina hiahiatia.
– Tāpirihia ngā tapanga pātene: Band, Seek, Vol, Preset.
Ehara i te mea he ātaahua te āhua o tētahi pouaka pai, engari ka whakanui ake hoki i te whakamarie me te whakaiti i te raruraru o ngā taura tarewa.
10. Ngā Tuhipoka Ture me ngā Tuhipoka Matatika
He haumaru ture ngā kaiwhiwhi reo irirangi nā te mea ko ngā pāhotanga tūmatanui anake ka whiwhi koe. Heoi, mō ētahi auau (pēnei i ngā whakawhitiwhiti kōrero motuhake), he ture kei reira e pā ana ki te horapa o ngā mōhiohio e aroturukitia ana. Arotahi ki ngā pāhotanga (AM/FM) me ngā whakamātautau mātauranga.
Te Katinga
He kaupapa tino whakamere te hanga i tētahi reo irirangi ka taea te whiwhi i ngā auau maha, e whakakotahi ana i ngā hikohiko, te hōtaka, me te toi o te arotau i te pūihi me te whakaiti i te haruru. Ko te huarahi tino whaihua mō ngā tīmatanga ko te whakamahi i tētahi kōwae maha-roopu pērā i te Si4732/Si4735 me tētahi pūmana iti (Arduino/ESP32), he whakakaha oro, me tētahi kaikorero. Mā te tāpiri i tētahi whakaaturanga me ngā mana whakahāngai watea, ka taea e koe te whai i tētahi reo irirangi AM/FM/SW hanga-kāinga pumau me te mahi.
Ki te hiahia koe, ka taea e au te āwhina i a koe ki te hanga:
– te kaupapa waea e ai ki te kōwae kei a koe,
– rārangi hokohoko wāhanga (putanga ōhanga me te putanga mōrahi),
– Ngā tauira waehere Arduino/ESP32 mō te FM/AM/SW me te roopu roopu me ngā tahua kua whakaritea.
