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Voice power on switch?
- Thread starter Magice
- Start date
Michael Daly
[H]ard|Gawd
- Joined
- Jan 6, 2007
- Messages
- 1,212
That switch might not be useful with a computer pulling several hundred watts. The Appliance model might be a better choice.
I always wonder what those light duty devices will do to a switching power supply. If they use an SCR or something like that and end up outputting hall-wave rectified power, will a switching power supply still operate correctly?
I always wonder what those light duty devices will do to a switching power supply. If they use an SCR or something like that and end up outputting hall-wave rectified power, will a switching power supply still operate correctly?
Arcygenical
Fully [H]
- Joined
- Jun 10, 2005
- Messages
- 25,066
If you're up to soldering...
You can use this sound activated relay kit:
http://www.electronickits.com/kit/complete/elec/k126.htm
You can change the relay switch time from 1-5s depending on the parts you use.
It runs off of 12v, just like your PSU supplies, so you're good there.
You can use this sound activated relay kit:
http://www.electronickits.com/kit/complete/elec/k126.htm
You can change the relay switch time from 1-5s depending on the parts you use.
It runs off of 12v, just like your PSU supplies, so you're good there.
It runs off of 12v, just like your PSU supplies, so you're good there.
Thats all very well, but how does it get the 12v from the power supply if the switch is being used to turn the PC on.
Keep in mind that type of thing is activated by any sound within the vocal frequency range, not just voice. It certainly does not understand phrases. You may also have to include some type of filter or other circuit to keep it from accidentally switching the pc off, perhaps triggered even from sounds from your speakers once the pc starts.
teststrips
Limp Gawd
- Joined
- Jun 2, 2003
- Messages
- 506
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Michael Daly
[H]ard|Gawd
- Joined
- Jan 6, 2007
- Messages
- 1,212
Thats all very well, but how does it get the 12v from the power supply if the switch is being used to turn the PC on.
The power supply is turned off and on by a switch on the back of the PSU. The computer is powered up by the switch on the front of the case. Power is always available to the switch on the front. Check the ATX standard and you'll find which wires in the power supply are always live and which ones go live when the front power switch is turned on.
Arcygenical
Fully [H]
- Joined
- Jun 10, 2005
- Messages
- 25,066
Thats all very well, but how does it get the 12v from the power supply if the switch is being used to turn the PC on.
Use an external PSU, or step up the +5VSB line to 12v. Christ, that relay only uses ~35ma when active and 10ma when inactive, it's not a problem at all.