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Joined: Dec 2002
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The power supply for one of my wireless mics went dead. It's 12VDC 400mA. I found a 12VDC 1A power supply. Is there a way to lower the current coming out of the power supply I found? Could I use a resistor?
Jeff Moss
Moss Communications
Computer Repair-Networking-Cabling
MBSWWYPBX, JGAE
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Joined: Dec 2005
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RIP Moderator-Mitel, Panasonic
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RIP Moderator-Mitel, Panasonic
Joined: Dec 2005
Posts: 7,056 |
Jeff, this is like house wiring. You can plug a 60 watt lamp or a 1400 watt toaster into the 110volt AC outlet. (Or like 25 or 70 volt speakers) They work fine because they are designed to use 110volts AC (or 25/70 volt audio feed) and DRAW only the amount of power they need. Your Mic will work fine, assuming the power supply is truly 12volts DC @ 1 amp, and not designed to feed 1 amp at 12 volts due to load, and jumps to 14 volts @ 1/2 Amp. Check the power supply without a load and if it doesn't go over 12.5 volts dc, all will be fine.
When I was young, I was Liberal. As I aged and wised up, I became Conservative. Now that I'm old, I have settled on Curmudgeon.
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Joined: Dec 2002
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I just put my meter on the power supply and I got 16.5 volts. Looks like it isn't gonna work for me.
Jeff Moss
Moss Communications
Computer Repair-Networking-Cabling
MBSWWYPBX, JGAE
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Joined: Sep 2005
Posts: 9,289 Likes: 15
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Jeff you could add a 12v Zener diode and resistor but it would be easier to just get the right power supply
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Joined: Dec 2005
Posts: 7,056
RIP Moderator-Mitel, Panasonic
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RIP Moderator-Mitel, Panasonic
Joined: Dec 2005
Posts: 7,056 |
Merrit has the right idea. Either that or a 7812 voltage regulator and .01uf cap and 100uf cap, both rated at 50 volts or more and something to mount them on and and and. Just get a good 12 volt dc regulated P/S.  Oh, and watch the polarity!
When I was young, I was Liberal. As I aged and wised up, I became Conservative. Now that I'm old, I have settled on Curmudgeon.
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Joined: Dec 2002
Posts: 9,429 Likes: 3
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Yeah I was trying to get it to work for my event tonight...wanted all 6 wireless mics but just used 5. My boss will get a power supply from the sound company during the week. I just worked a 12 hour day for a tech event 
Jeff Moss
Moss Communications
Computer Repair-Networking-Cabling
MBSWWYPBX, JGAE
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