| Computers Forum Index » Computer - DCOM - Modems » Riger adsl2+ modem can use just 4.6v input ( spec says... |
|
Page 1 of 1 |
|
| Author |
Message |
| Lim PE... |
 Posted: Tue Jun 02, 2009 3:36 pm |
|
|
|
Guest
|
No need for the supplied adaptor's 5.25v which [i] makes mdm
very hot = slower & less durable [ii] wastes electricity & aircon
bill ; just (4.6 ÷ 5.25)² = 76.7 % of original wattage is needed.
Minimum voltage may be <4.6v. |
|
|
| Back to top |
|
|
|
| David Webb... |
| Posted: Tue Jun 02, 2009 4:10 pm |
|
|
|
Guest
|
Lim PE wrote:
Quote: No need for the supplied adaptor's 5.25v which [i] makes mdm
very hot = slower & less durable [ii] wastes electricity & aircon
bill ; just (4.6 ÷ 5.25)² = 76.7 % of original wattage is needed.
Minimum voltage may be <4.6v.
wondering if this works for all the modem/router, by supplying only 80%
of the intended power |
|
|
| Back to top |
|
|
|
| tanhks... |
| Posted: Thu Jun 04, 2009 1:01 pm |
|
|
|
Guest
|
"Lim PE" <LPE at (no spam) zdmail.com> wrote in message
news:4a250f58$1_2 at (no spam) news.tm.net.my...
Quote: No need for the supplied adaptor's 5.25v which [i] makes mdm
very hot = slower & less durable [ii] wastes electricity & aircon
bill ; just (4.6 ÷ 5.25)² = 76.7 % of original wattage is needed.
Minimum voltage may be <4.6v.
Why would anyone want to save that small amount of electricity?
(modem consume very little electricity)
Use a laptop instead of a desktop can save huge amount of electricity.
A laptop consume only 70Watts but desktop need a least 200watts some even
300 or 400 Watts!
Use you own's electric generator instead of TNB's power might save money
also. |
|
|
| Back to top |
|
|
|
| Rkaru... |
| Posted: Mon Jun 08, 2009 5:16 am |
|
|
|
Guest
|
On 04/06/2009, tanhks wrote but may now claim to have been misquoted:
Quote:
"Lim PE" <LPE at (no spam) zdmail.com> wrote in message
news:4a250f58$1_2 at (no spam) news.tm.net.my...
No need for the supplied adaptor's 5.25v which [i] makes mdm
very hot = slower & less durable [ii] wastes electricity & aircon
bill ; just (4.6 w 5.25)2 = 76.7 % of original wattage is needed.
Minimum voltage may be <4.6v.
Why would anyone want to save that small amount of electricity?
(modem consume very little electricity)
Use a laptop instead of a desktop can save huge amount of electricity.
A laptop consume only 70Watts but desktop need a least 200watts some
even 300 or 400 Watts!
Use you own's electric generator instead of TNB's power might save
money also.
Use Dynamo can save or not?
-- |
|
|
| Back to top |
|
|
|
| opcu... |
| Posted: Mon Jun 08, 2009 10:02 am |
|
|
|
Guest
|
"Rkaru" <rkaru at (no spam) streamyx.com> wrote in message
news:4a2c7e89_1 at (no spam) news.tm.net.my...
Quote: On 04/06/2009, tanhks wrote but may now claim to have been misquoted:
"Lim PE" <LPE at (no spam) zdmail.com> wrote in message
news:4a250f58$1_2 at (no spam) news.tm.net.my...
No need for the supplied adaptor's 5.25v which [i] makes mdm
very hot = slower & less durable [ii] wastes electricity & aircon
bill ; just (4.6 w 5.25)2 = 76.7 % of original wattage is needed.
Minimum voltage may be <4.6v.
Why would anyone want to save that small amount of electricity?
(modem consume very little electricity)
Use a laptop instead of a desktop can save huge amount of electricity.
A laptop consume only 70Watts but desktop need a least 200watts some
even 300 or 400 Watts!
Use you own's electric generator instead of TNB's power might save
money also.
Use Dynamo can save or not?
--
good idea! ask sonny ( not Dave's ) to paddle the bicycle while you use your
laptop.
:) opcu |
|
|
| Back to top |
|
|
|
| Caroline... |
| Posted: Mon Jun 08, 2009 2:34 pm |
|
|
|
Guest
|
Quote: "Rkaru" <rkaru at (no spam) streamyx.com> wrote in message
news:4a2c7e89_1 at (no spam) news.tm.net.my...
On 04/06/2009, tanhks wrote but may now claim to have been misquoted:
Use Dynamo can save or not?
good idea! ask sonny ( not Dave's ) to paddle the bicycle while you use
your laptop.
:) opcu
Ol' Pc, it's cute when I imagined Sonny ( not his real name ) paddling
bicycle and the
dynamo driving Rkaru's laptop... next you know, doc also want! |
|
|
| Back to top |
|
|
|
| doc... |
| Posted: Mon Jun 08, 2009 2:48 pm |
|
|
|
Guest
|
Caroline wrote:
Quote: good idea! ask sonny ( not Dave's ) to paddle the bicycle while you
use your laptop.
:) opcu
Ol' Pc, it's cute when I imagined Sonny ( not his real name ) paddling
bicycle and the
dynamo driving Rkaru's laptop... next you know, doc also want!
I prefer Sunny power! No, not Sunil power. |
|
|
| Back to top |
|
|
|
| David Webb... |
| Posted: Wed Aug 26, 2009 10:02 am |
|
|
|
Guest
|
tanhks wrote:
Quote: "Lim PE" <LPE at (no spam) zdmail.com> wrote in message
news:4a250f58$1_2 at (no spam) news.tm.net.my...
No need for the supplied adaptor's 5.25v which [i] makes mdm
very hot = slower & less durable [ii] wastes electricity & aircon
bill ; just (4.6 ÷ 5.25)² = 76.7 % of original wattage is needed.
Minimum voltage may be <4.6v.
Why would anyone want to save that small amount of electricity?
(modem consume very little electricity)
Use a laptop instead of a desktop can save huge amount of electricity.
A laptop consume only 70Watts but desktop need a least 200watts some even
300 or 400 Watts!
Use you own's electric generator instead of TNB's power might save money
also.
my desktop only needs 100W  |
|
|
| Back to top |
|
|
|
| Franc Zabkar... |
| Posted: Thu Aug 27, 2009 11:45 am |
|
|
|
Guest
|
On Wed, 26 Aug 2009 14:02:45 +0800, David Webb
<no_spam_kiddoxp at (no spam) yahoo.com> put finger to keyboard and composed:
Quote: tanhks wrote:
"Lim PE" <LPE at (no spam) zdmail.com> wrote in message
news:4a250f58$1_2 at (no spam) news.tm.net.my...
No need for the supplied adaptor's 5.25v which [i] makes mdm
very hot = slower & less durable [ii] wastes electricity & aircon
bill ; just (4.6 ÷ 5.25)² = 76.7 % of original wattage is needed.
Minimum voltage may be <4.6v.
I suspect that few modem chips run on +5V. Instead they would operate
from 3.3V or 2.5V or 1.8V which would probably be generated by onboard
secondary switchmode regulators. Modern hard drives seem to follow
this design philosophy as well. Subregulation means that it doesn't
really matter whether the input is +5V or +6V -- losses in switchmode
regulators are not calculated in the same way as for linear
regulators. A good example that illustrates this is a TV with a
universal power supply that is capable of operating from both 110V and
240V.
As the OP's modem doesn't appear to have a USB port, I wonder what the
+5V is used for.
- Franc Zabkar
--
Please remove one 'i' from my address when replying by email. |
|
|
| Back to top |
|
|
|
|
