It won't work with Uverse, it doesn't have voltage unless you have a POTS line over it.Very cool, and thanks for sharing this one.
I'm too lazy to dig into it, but kind of wonder about having Uverse instead of a traditional land line would affect things? I rather doubt it'd work the same way.
Very cool, and thanks for sharing this one.
I'm too lazy to dig into it, but kind of wonder about having Uverse instead of a traditional land line would affect things? I rather doubt it'd work the same way.
It won't work with Uverse, it doesn't have voltage unless you have a POTS line over it.
This is really not a good idea.
- Telco's take a dim view putting unauthorized equipment on the line.
- The D+ and D- line are not controlled - take a look at the USB charging spec, I imagine there's requirements for that.
- The absolute maximum voltage input for a LM7805 is around 30V.
- What happens when the line rings? You're going to get a nasty little AC spike coming in. The diode will block this, but then you're going to get a big ripple.
- Assuming 48VDC, you're looking at roughly 7 mA per REN. Let's assume the line supports 10 REN before failure or overcurrent protection. That's 70 mA, I'm too lazy to run the numbers, but after losses, you'll get about 40 mA @ 5VDC coming out - a far cry from the 2000 mA your phone craves.
- Where's any sort of protection against transient voltage?
- This contraption is a great way to release the magic smoke in electronics.
- What happens when lightening strikes? Presumably you're doing this because the powers out...
- And if you're like me, I've got fiber to the premise, meaning the power on the line is from my own electricity - so no good.
Here's a better idea - turn the damn phone off until you need it.
This is really not a good idea.
- Telco's take a dim view putting unauthorized equipment on the line.
- The D+ and D- line are not controlled - take a look at the USB charging spec, I imagine there's requirements for that.
- The absolute maximum voltage input for a LM7805 is around 30V.
- What happens when the line rings? You're going to get a nasty little AC spike coming in. The diode will block this, but then you're going to get a big ripple.
- Assuming 48VDC, you're looking at roughly 7 mA per REN. Let's assume the line supports 10 REN before failure or overcurrent protection. That's 70 mA, I'm too lazy to run the numbers, but after losses, you'll get about 40 mA @ 5VDC coming out - a far cry from the 2000 mA your phone craves.
- Where's any sort of protection against transient voltage?
- This contraption is a great way to release the magic smoke in electronics.
- What happens when lightening strikes? Presumably you're doing this because the powers out...
- And if you're like me, I've got fiber to the premise, meaning the power on the line is from my own electricity - so no good.
Here's a better idea - turn the damn phone off until you need it.