Thread: Modem power ON with PC

Before you choose to ignore or read on, let me make this clear. This thread is about "powering ON" the modem not about "connecting".

Scheduling the PC to power on and connect for the 0200-0800 period is a well discussed and explained topic. But the modem is left ON always. If im going to sleep at 2200 the modem is left ON at that time and switched OFF only when i wake up. The modem is left on for an extra 4 hours. This is a waste of energy, addition of heat in the room, reduction of device life, distracting lights, etc...

Apart from this if you forget to switch it on that night, an entire night worth about 3.5GB+1.3GB is wasted. The PC powers on to find no connection, energy is wasted. Hard disks are aging for no reason.

Some of you may find this insignificant but if you add it up days to weeks to months it ends up being quite significant.

My quest is to make the modem power on along with the PC. It is quite simple and adresses all the problems mentioned above. There are two methods that i can think of easily. 1) Use a relay from the PC PSU to switch on the modem, 2) Power the modem from the PC PSU.

The second is the simpler of the two. The Molex 8981 connector (CD Drive, HDD, Fan) from the PSU has a +12V (yellow) and ground (black). A male Molex connector, some wire, a DC connector is all thats needed costing about INR 35-40.

Now MY porblem is that my modem uses a 12V AC 1200mA input. The PC PSU gives only a DC output. What can i do? Is it safe to directly connect it? Or is there a simple way to convert DC to AC? Please help.

Now MY porblem is that my modem uses a 12V AC 1200mA input. The PC PSU gives only a DC output. What can i do?

Good Idea.
will wait for feedback from other members. will post my reply later.

No response so far.
If the input is 12 V~AC to the modem,
( adapter simply a step down transformer 230V~AC to 12 V ~AC
it can be presumed (T1 in diagram)
goes directly to a bridge or fullwave rectifier circuit in modem.

http://www.electronics-tutorials.com...wrsup-fig1.gif

2. As the out put from Computer SMPS is 12 V =DC ( 1Amp needed) can be safely connected.
3. To be on safe side , open modem cover and see the
Power input socket(port) to confirm No 1 above.
feedback.

66

The following two threads might be relevant in this regard.
I'm very much interested in this setup and will follow this thread closely.

http://www.indiabroadband.net/bsnl-b...me-500c-6.html (Plan change from 750UL PLUS to HOME 500C or HOME 500C+.)

http://www.indiabroadband.net/bsnl-b...me-500c-2.html (Plan change from 750UL PLUS to HOME 500C or HOME 500C+.)

Another way is to use a PCI adsl Modem such as Akeoo
/netgear PCI adsl modem.
if spare PCI slot is available in desktop.

Another reference:
http://www.indiabroadband.net/bsnl-b...tml#post284627 (BSNL NU Schedulers)

Can you try connecting the Modem and PC on a spike buster socket strip?
So when you Power on your PC your modem also starts

Can you try connecting the Modem and PC on a spike buster socket strip?
So when you Power on your PC your modem also starts

I think spike buster has 4 different sockets for connecting PC/modem/Printer etc.
2.
In a Desktop for Monitor there will be one socket ( 3 PIN).
and also another socket for the Power connection for the system.(desktop)
The modem can be connected with a two way plug here. ( modem + monitor)
When you start PC ( with scheduler), presume modem/monitor also will get connected.

Yeah thats what I meant
It is relatively easy to do

Im the OP but it may seem like im ignoring the thread. I have been very busy lately with a few exams. I will post back as soon as i can.

I think spike buster has 4 different sockets for connecting PC/modem/Printer etc.

But how will that power on with the PC, wont it just be powered on all the time?

In a Desktop for Monitor there will be one socket ( 3 PIN).
and also another socket for the Power connection for the system.(desktop)

Is this the connecter on the back of the SMPS? if yes, isnt that for decade old PC's, even older actually? Isnt that too always powered?

I mean connect the modem and pc to a single electricity source (by using extensions)
So the modem is only on when the PC is on