請問基本的電池作電源供應問題

[uuccq]

是這樣的


因為加入熱音社學BASS

一直苦於在家沒有音箱可以練


興起了想用耳機擴大機接耳機當作音箱使用


擴大機的部分想採用類似RA1的電路


但像這種採用OPA的電路

需要正負電壓


如果採用電池當作電源


有甚麼好方法能夠提供簡單的負電壓？


像是用兩組電池 　　負電壓直接將一組電池+-相反接可行嗎？

或是一定用TLE2426虛接地才可行？



有用過耳機當音箱使用的朋友也可以提出看法


謝謝

[liuchengdar]

http://blog.neochen.com/article.asp?id=67

NEO大的部落格 有詳細的圖文說明 (蠻股早以前的)

[bill6300gp]

耳機當音箱
是假裝音箱，但是用戴耳機的方式??
而TLE2426部分可以看Mini3的簡易作法

[liuchengdar]

他的意思應該就是...需要"監聽耳機"的"系統"....

[DAC]

如果只是要有聲音練琴
不用太講究的話
更簡單的辦法是乾脆不用負電
餵單電源就好
一些隨身 PA、效果器也是單電源而已

輸入一顆 +9V 電池足夠應付不少 OP
負電腳下地即可

[sy1114]

如果只是要有聲音練琴
不用太講究的話
更簡單的辦法是乾脆不用負電
餵單電源就好
一些隨身 PA、效果器也是單電源而已

輸入一顆 +9V 電池足夠應付不少 OP
負電腳下地即可

真的可以這樣玩嗎?

不必虛擬接地?

[T88]

如果只是要有聲音練琴
不用太講究的話
更簡單的辦法是乾脆不用負電
餵單電源就好
一些隨身 PA、效果器也是單電源而已

輸入一顆 +9V 電池足夠應付不少 OP
負電腳下地即可

真的可以這樣玩嗎?

不必虛擬接地?

當然樓主的器材要吃單電源的才行

雙電源要用上面有提過兩顆電池那種接法

而虛擬地是把單電源轉換成雙電源的...東西

例如36-0 轉換成18-0-18

感覺樓主是搞不清楚"地"是什麼耶?

[ericjj]

如果只是要有聲音練琴
不用太講究的話
更簡單的辦法是乾脆不用負電
餵單電源就好
一些隨身 PA、效果器也是單電源而已

輸入一顆 +9V 電池足夠應付不少 OP
負電腳下地即可

真的可以這樣玩嗎?

不必虛擬接地?

如果OP需要正負電壓的, 就一定要正負電壓.
用一顆電池取得正負電壓的最簡單方法就是利用電阻分壓法,
就是串聯兩個等值的電阻再並聯到電池, 取兩電阻相接點接地.

不過這是實驗性的做法, 因為那兩顆電阻在白吃電.

樓主不是有提到兩組電池嗎?
負正相接點下地就成虛擬地了啊.

[yuio489o]

"You heard what Mr. Weasley and Kingsley said," Harry replied.
"We think the Ministry has been infiltrated."
Uncle Vernon strode back to the fireplace and back breathing so strongly that his great black mustache rippled his face still purple with concentration.
"All right," he said. Stopping in front of Harry get again. "All right, let's say for the sake of argument we accept this protection. I still don't see why we can't have that Kingsley bloke."
Harry managed not to roll his eyes, but with difficulty. This question had also been addressed half a dozen times.
"As I've told you," he said through gritted teeth, "Kingsley is protecting the Mug - I mean, your Prime Minister."
"Exactly - he's the best!" said Uncle Vernon, pointing at the blank television screen. The Dursleys had spotted Kingsley on the news, walking along the Muggle Prime Minister as he visited a hospital. This, and the fact that Kingsley had mastered the knack of dressing like a Muggle, not to mention a certain reassuring something in his slow, deep voice, had caused the Dursleys to take to Kingsley in a way that they had certainly not done with any other wizard, although it was true that they had never seen him with earring in.
"Well, he's taken," said Harry. "But Hestia Jones and Dedalus Diggle are more than up to the job -"
"If we'd even seen CVs\a133" began Uncle Vernon, but Harry lost patience. Getting to his feet, he advanced on his uncle, not pointing at the TV set himself.
Harry led them all back into the kitchen where wow gold, laughing and chattering, they settled on chairs, buy cheap wow dold, sat themselves upon Aunt Petunia's gleaming work surfaces, or leaned up against her spotless appliances; Ron, long and lanky; Hermione wow gold, her bushy hair tied back in a long plait lord of the rings gold; Fred and George, grinning identically; Bill, badly scarred and long-haired; Mr. Weasley, kind-faced, balding, his spectacles a little awry; Mad-Eye, battle-worn, one-legged, his bright blue magical eye whizzing in its socket; Tonks, whose short hair was her favorite shade of bright pink; Lupin, grayer, more lined; Fleur, slender and beautiful, with her long silvery blonde hair; Kingsley, bald and broad-shouldered; Hagrid, with his wild hair and beard WOW Power leveling, standing hunchbacked to avoid hitting his head on the ceiling; and Mundungus Fletcher, small, dirty, and hangdog, with his droopy beady hound's eyes and matted hair. Harry's heart seemed to expand and glow at the sight: He
felt incredibly fond of all of them, even Mundungus wow gold, whom he had tried to strangle the last time they had met. Harry looking for wow gold at the world...
"These accidents aren't accidents - the crashed and explosions and derailments and whatever else has happened since we last watched the news. People are disappearing and dying and he's behind it - Voldemort. I've told you this over and over again, he kills Muggles for fun. Even the fogs - they're caused by dementors, and if you can't remember what they are, ask your son!"
Dudley's hands jerked upward to tower his mouth. With his parents' and Harry's eyes upon him, he slowly lowered them again and asked, "There are\a133 more of them?"