Roheline elu

Niisiis, nüüd olen tükk aega elanud päikseeli kasutades. Jätkuvalt ei ole mul laadimisregulaatorit. Ehk siis vaatan aku pinget, tõmban paneeli juhtme välja, vaatan pinget, panen juhtme tagasi jne.

Päiksepaneelilt toidetav isetehtud võimendi

Lõpuks sain valmis ühe oma teise rohelise eluga seotud projekti – võimendi. Mu vanaisa leidis kuskilt Logitech X-530 5.1 kõlarid. Neil oli ilmselt mingi toiteskeemi probleem, aga ma ei saanudki seda täpselt teada, sest vanaisa otsustas terve bassikõlarikasti koos võimendiga ära lõhkuda ja minema visata. Ehk siis mulle jäi bassikõlari element ja viis väiksemat kõlarit.

Kuna ma polnud kunagi varem mitte ühtegi analoogplaati teinud mõtlesin lihtsalt alustada. Ehk siis alustada kahe kanalilisest võimendist. Ostsin siis ebayst TDA2009A kivi. Asi on võimeline 2 kanalit 10W juures mängima. Võtsin andmelehest kõige lihtsama skeemi, lõikasin makettplaadist täpselt sellise tüki, mis kõlari sisse mahtus ja jootsin asjad peale. Avastasin ka veidi toredaid asju, näiteks kui kanalite negatiivse tagasiside jalad omavahel ära vahetada tekib võimendi asemel heligeneraator jne. Lisaks avastasin ka, et helitugevus jääb samaks, olenemata toitepingest. Ainus asi mis muutub on kuumus. Madalamate pingetega hakkavad tugevamad helid üle peksma, mida madalam pinge on seda madalamal hakkab üle peksma. Huvitav.

555 põhinev laadimisregulaator

Praeguseks kõlarid töötavad normaalselt aku pealt. Päiksepaneel suudab ka pilvise päevaga mu UPSi aku täis laadida ja see on piisav kogus elektrit, et kõlareid ja laualampi õhtu otsa toita, mõnus. Avastasin ka, et kui aku tagant ära võtta siis päevasel ajal saab muusikat kuulata ka otse päiksepaneeli pealt. Kõvemad helid hakkavad küll üle peksma, aga no, misiganes.

Laadimisregulaatori plaadi jootsin ka kokku, lasin veidi suitsu välja, pean veidi veel tegelema, et seda piisavalt hästi tööle saada, et julgeks oma akut selle käsutusse anda.

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