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Old 3rd September 2012, 08:45 AM   #1
diyAudio Member
Join Date: Sep 2009
Location: Timisoara
Default Discrete circuit for relay selecting help

Hello. I kindly ask your help in designing a discrete circuit. It seems i am unable to make it work on my own.
I need to build a relay based source selector. I need to select the active relay using a few push buttons, each button associated with a relay. Thank you
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Old 3rd September 2012, 04:50 PM   #2
diyAudio Member
Join Date: Nov 2008
Try this 4 pos. switch, easily extended to 8 or more. The 0.1uF cap across the "Off" switch asures that the unit is off on power-up. All pb-switches are momentary. Good luck! E
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Old 3rd September 2012, 05:00 PM   #3
AndrewT is offline AndrewT  Scotland
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Join Date: Jul 2004
Location: Scottish Borders
Please describe how 4012 works.
Then you could follow up with the 4044.
regards Andrew T.
Sent from my desktop computer using a keyboard
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