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Help needed designing signal switching circuit
Help needed designing signal switching circuit
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Old 30th April 2015, 07:06 AM   #11
Elvee is offline Elvee  Belgium
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Originally Posted by hajj View Post
Yes, dont know what sources will be plugged into this amp as time goes by, and any slight difference in ground potential would be problematic
This circuit will generate very energetic pulses (24V^) from a single 12V supply and consume zero power under quiescent conditions.
For the ground problem, you can leave a permanent ~10Ω resistor between the two grounds: it will be sufficient to break any ground loop, but will also keep things under control when the contacts are momentarily floating.
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Old 30th April 2015, 08:01 AM   #12
Mooly is offline Mooly  United Kingdom
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Help needed designing signal switching circuit
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Old 30th April 2015, 01:47 PM   #13
AndrewT is offline AndrewT  Scotland
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Old 2nd May 2015, 01:55 PM   #14
hajj is offline hajj  Lebanon
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Thank you all for your contribution!
These are clever solutions I never would have been able to think through on my own.
I can confirm that Elvee's circuit works great, even with a 5V supply driving three 12V relays.
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