4 chanel Stereo Input Selector - diyAudio
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Old 15th October 2013, 06:16 AM   #1
Join Date: Oct 2013
Default 4 chanel Stereo Input Selector

I have completed 4 channel Audio controller circuits,
brain of this kit is 89C52 based controller board, which is programmed for LCD interface, front panel with button and LED's
it supports PSU interface, Standby and Active mode.
after power on it goes to "Standby" mode, on press on button it goes into "Active" mode & prompts for channel selection, upon press of button it changes channel, same is displayed in LCD.
Active and Standby mode signals PSU, high and low .

Front panel button and LED:
Two buttons for Power on an other for Channel Select.
Two LED , Power on off LED and Button press response LED with option for buzzer (5 volts beeper) on board.

Image Description:

Image 1 (SEL_Standby2.jpg) : After Power ON, Standby mode.
Image2 (SEL_Select2.jpg_ : After press on button, Active , Select (prompt for channel Select)
Image 3 (SEL_Channel1.jpg) : After pressing Channel Select Button. Shows "Channel 1"

Thank you
Attached Images
File Type: jpg SEL_Standby2.jpg (172.0 KB, 177 views)
File Type: jpg SEL_Select2.jpg (141.9 KB, 169 views)
File Type: jpg SEL_Channel1.jpg (152.0 KB, 166 views)
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Old 17th October 2013, 09:31 AM   #2
bimo is offline bimo  Indonesia
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Join Date: Sep 2010
Location: Depok, West of Java
Do you use relay or IC for select the analog input?
About 15 years ago, I use 89C52 (8051 family), after that I use AVR microcontroller and PIC. But PIC is expensive here.

Last edited by bimo; 17th October 2013 at 09:33 AM.
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