Ovoz davri uchun o'lchash o'rni?

Texnik bo'lmagan odam bu yerda, shuning uchun muloyim bo'ling. Men har bir xonada shinam dinamik bo'lgan joyga ko'chib o'tdim (sinab ko'rdim, lekin ular bir-biridan ajralib turolmaydi, ishlab chiqaruvchilardan farqli emas va 15+ yil oldin ishdan ketgan kompaniya). Shunday qilib, ular 8 ohmli karnay deb ataymiz.

Media-kuchaytirgichim bor va barcha ma'ruzachilarning musiqasini muvaffaqiyatli ijro etmoqdaman, shuning uchun men ular ishlayotganini bilaman.

Xotinim qaysi dinamiklarni yoqish yoki o'chirishni tanlash qobiliyatini xohlaydi, shuning uchun men tezkor Arduino loyihasi va 8-12 o'rni bilan relyef kartasini o'ylayman ... lekin yukni qanday baholashni bilmayman, shuning uchun men O'rni qanday o'lchash kerakligini bilish.

Buning eng yaxshi usuli haqida biron-bir maslahat, yoki men faqatgina elektr-energiya relyeflari va bularning barchasidan magistrlarni ortiqcha muhandisga aylantirishim kerakmi?

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O'rnimizni bu hiyla qiladi. Siz FET yoki tranzistorlarni sinashingiz mumkin.
qo'shib qo'ydi muallif dotnetengineer, manba
Siz hatto arduinolarga ham kerak emas, halol bo'lishingiz kerak. O'rnimizni o'chirish/yoqish uchun ba'zi bir kalitlarni qo'ying. Agar veb-interfeysning bir nechta turini yoki vaqt jadvalini yoki 1-on-1-ni kalit bilan bog'lanmagan narsa qilmoqchi bo'lsangiz :)
qo'shib qo'ydi muallif dotnetengineer, manba
Agar kilo-vattli audio asboblar bilan ishlamasangiz, ostidagi yordamida o'rni bilan muhandislik qilish qiyin bo'ladi.
qo'shib qo'ydi muallif Majenko, manba
EBayda "Arduino" reley-kartasi etarli darajada ko'p bo'ladi va siz kerakli barcha gijgijlash tizimlari mavjud.
qo'shib qo'ydi muallif Majenko, manba
O'rnimizni haydash uchun transistorlar kerak bo'lishi mumkinligini yodda tuting. O'rnimizni rulonlari ustidan snubber diyotlarini unutmang. Siz oddiy echim bo'lishi mumkin bo'lgan "karnaychali kalitlarga qutilarini" sotib olishingiz mumkin.
qo'shib qo'ydi muallif Nick Gammon, manba
Men shunga o'xshash loyihani ko'rib chiqdim: iceboundflame.com/projects/multi-room -o-rupiya-audio-nazorat-i va ma'ruzachi bilan bog'liq bo'lgan savol: electronics.stackexchange.com/questions/155779/…
qo'shib qo'ydi muallif Shelvacu, manba

1 javoblar

If you can estimate speaker power, it probably is reasonable to use the ordinary power formula P = I²R for estimating the current the relay needs to handle. Typically, high-power speakers of a given kind are bigger than low-power speakers of the same kind. But as you can see from pictures of 5W, 10W, and 40W speakers, some 10W speakers are smaller than some 5W speakers, and some are bigger than 40W speakers, so power estimation based on speaker size can be difficult.

Ovoz manbaiga (tyuner yoki pleer yoki biron bir kuchaytirgichga ulangan) kirishingiz bo'lsa, kuchaytirgichda ko'rsatilgan chiqish quvvatini topishingiz mumkin.

Har qanday holatda, kuch formula bo'yicha I2 terminiga qarab, rejalashtiradigan oqim oralig'i nisbatan kichik. Misol uchun, agar 5W 8 Ō dinamik, 5/8 = I² va I = 0.79 A bo'lsa, u holda 40W bo'lsa, u holda I = 2.24 A bo'ladi. Arduino bilan oddiy foydalanish uchun sotiladigan o'rni tizimlari.

Note 1: A relay's current rating ordinarily is derated significantly when the relay is used to switch DC or high-voltage AC. Audio is low-voltage AC and relay derating probably isn't needed. Note 2: The current a relay can safely switch in a live circuit may be much less than the unswitched current that closed contacts can carry. This might not be a problem with low-voltage audio. Note 3: Some commercial high-wattage audio distribution systems operate at higher voltages (see, eg, wikipedia's high-voltage audio distribution systems article, re 70.7 V etc systems); if you have one of those – as amplifier labeling might reveal – the example calculations shown above would need adapting.

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