本帖最後由 johnme 於 2013-11-11 15:33 編輯
billymud 發表於 2013-11-11 15:26 static/image/common/back.gif
做比小朋友玩，當是一粒電。
用兩粒電出現volts不平衡，燒headphone點算？ ...
所以要用TLE2426囉~
如果唔要OPAMP ROLLING,
同高電壓的話,
用一粒9V都係好好既COST CUTTING方法~
Experimenting the layout:
1. put the battery and electrolytic caps near the switch to shorten power wires;
2. volume pot put to right;
3. put back the 10 resistor for reducing noise if any.
cons:
220 caps far away from output
johnme 發表於 2013-11-12 22:05 static/image/common/back.gif
Experimenting the layout:
1. put the battery and electrolytic caps near the switch to shorten power ...
橫掂一粒電，可否咁擺？{:1_262:}
印左20張PCB,
做左第一個樣本,
可以插一粒9V電,
插兩粒9V電都得.{:1_253:}
用WIMA MKS做COUPLING同BYPASS,
(原本想做多個用WIMA MKP以作比較,
不過O的250V既0.33MKP太大粒插唔到)
VISHAY MRS25電阻,
用左5532做炮灰,
比印象中既5532好聲,
即刻比左同事入糖果盒,
唔記得影相.
(借用同事張相用住先)
johnme 發表於 2013-12-17 08:40 static/image/common/back.gif
印左20張PCB,
做左第一個樣本,
可以插一粒9V電,
good job ! {:6_193:}
may u shareone pcb (at cost) for my hobby ? {:1_263:}
billymud 發表於 2013-12-17 13:13 static/image/common/back.gif
good job !
may u shareone pcb (at cost) for my hobby ?
No problem.
Please pm me your mailing address to me or any contact info you find convenience.
本帖最後由 johnme 於 2013-12-17 14:54 編輯
多謝各位支持,
小弟免費送出cmoy pcb數塊,
有興趣c-hings請pm本人通訊地址,
送原即止.
下面個zip file有schematic, layout同BOM.
輸入電阻可用100K-1M,
輸入CAP可以用0.22~0.47u.
留意個volume制是連開關的~
本帖最後由 billymud 於 2013-12-17 23:29 編輯
johnme 發表於 2013-12-17 14:50 static/image/common/back.gif
多謝各位支持,
小弟免費送出cmoy pcb數塊,
有興趣c-hings請pm本人通訊地址,
thank you very much.i wish to get one pc. plz check pm. {:6_195:}
billymud 發表於 2013-12-17 23:19 static/image/common/back.gif
thank you very much.i wish to get one pc. plz check pm.
收到~
小弟下午會去寄,
除PCB外,
你會收到部分PARTS的.
ENJOY!
