又係豬妹---請教eagle pcb layout同搵廠印pcb

johnme

billymud 發表於 2013-11-11 15:26
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~

johnme

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

billymud

johnme 發表於 2013-11-12 22:05
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？

johnme

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.
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)

billymud

johnme 發表於 2013-12-17 08:40
印左20張PCB,
做左第一個樣本,
可以插一粒9V電,

good job !
may u share  one pcb (at cost) for my hobby ?

johnme

billymud 發表於 2013-12-17 13:13
good job !  
may u share  one pcb (at cost) for my hobby ?

No problem.

Please pm me your mailing address to me or any contact info you find convenience.

johnme

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.

johnme

留意個volume制是連開關的~

billymud

johnme 發表於 2013-12-17 14:50
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.   

johnme

billymud 發表於 2013-12-17 23:19
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!