HP Laptop power supply output plug

bz <bz+ser_at_ch100-5.chem.lsu.edu> wrote in message
news:Xns9D3179D93A20BWQAHBGMXSZHVspammote_at_130.39.198.139...
"N_Cook" <diverse_at_tcp.co.uk> wrote in
news:hmm5kc$ale$1_at_news.eternal-september.org:

bz <bz+ser_at_ch100-5.chem.lsu.edu> wrote in message
news:Xns9D3062A472D33WQAHBGMXSZHVspammote_at_130.39.198.139...
"N_Cook" <diverse_at_tcp.co.uk> wrote in
news:hmll9f$rtr$1_at_news.eternal-september.org:

....

not found a www ref specifically to that Compaq DC polarity.
Did just DVM the blue lead back to the mains connector and 1.3M
regular resistance back to mains ground pin, nothing showing on
any other routes.


Some of these supplies use I2C communications to 'tell the
computer about the power supply capabilities'. Without the I2C
communications, the computer may complain that the supply doesn't
have sufficient capacity to charge the computer's batteries.

--
bz 73 de N5BZ k

please pardon my infinite ignorance, the
set-of-things-I-do-not-know is an infinite set.

Would a data stream be observable on the third wire from the ps at
switch on and disconnected from the pc or only after a RTS chirp or
something from the pc when connected?

I think that the computer senses when a voltage is present on the
power jack. I think it then asks the supply 'who are you'. If the
supply says 'I am an 85 (or whatever) supply', the computer is happy.
If it doesn't reply or says 'I am a low wattage supply', the computer
gives an error message.

I base this on the fact that the error message appears when I plug in
my 'broken' power supply to the computer OR when I plug the supply
into the AC, but not when I plug in a 'good supply' although the
'AC/battery indicator' changes when either supply is connected.












--
bz 73 de N5BZ k

please pardon my infinite ignorance, the set-of-things-I-do-not-know
is an infinite set.

Could not that be done totally within the pc
Within a few seconds of connecting and normal loading is ok try
maximum load for a fraction of a second and if
undercurrent/undervoltage then display error message

Jim Yanik <jyanik_at_abuse.gov> wrote in
news:Xns9D3270153A440jyaniklocalnetcom_at_216.168.3.44:

"N_Cook" <diverse_at_tcp.co.uk> wrote in
news:hmqf2h$ia3$1_at_news.eternal-september.org:

....

it's probably just a resistor value that gets read,forms a voltage
divider and the developed V gets read. Simple,cheap to implement.
No resistor,you get the "insufficient supply" message.


[quote from <http://en.wikipedia.org/wiki/Inspiron>]

"AC power adapter type cannot be determined"

When I startup my computer, I get the message “The AC power adapter
type cannot be determined. Your system will operate slower and the
battery will not charge."

This error occurs due to a communication error between an id-chip
within the AC adapter and the laptop. Mostly the issue is due to
unprotected 1-wire id-chip getting destroyed, or the laptop
motherboard being damaged. This issue has been known for a long time
and DELL has done nothing to fix it or compensate customers more than
replacing the damaged component within warranty, i.e. AC adapter or
laptop motherboard. There are reports of customers replacing the AC
adapter several times. This indicates that it is a design flaw, wrong
construction that can destroy the id-chip. More info on

http://www.laptops-battery.co.uk/blog/dell-ac-power-adapter-type-cannot
-
be-determined-solution/#content

[end quote]

"N_Cook" <diverse_at_tcp.co.uk> wrote in
news:hmqf2h$ia3$1_at_news.eternal-september.org:

.....

it's probably just a resistor value that gets read,forms a voltage
divider and the developed V gets read. Simple,cheap to implement.
No resistor,you get the "insufficient supply" message.

bz <bz+mspep_at_ch100-5.chem.lsu.edu> wrote in
news:Xns9D34AFBDC5471WQAHBGMXSZHVspammote_at_130.39.198.139:

Jim Yanik <jyanik_at_abuse.gov> wrote in
news:Xns9D3270153A440jyaniklocalnetcom_at_216.168.3.44:

"N_Cook" <diverse_at_tcp.co.uk> wrote in
news:hmqf2h$ia3$1_at_news.eternal-september.org:

....

it's probably just a resistor value that gets read,forms a voltage
divider and the developed V gets read. Simple,cheap to implement.
No resistor,you get the "insufficient supply" message.


[quote from <http://en.wikipedia.org/wiki/Inspiron>]

"AC power adapter type cannot be determined"

When I startup my computer, I get the message “The AC power adapter
type cannot be determined. Your system will operate slower and the
battery will not charge."

This error occurs due to a communication error between an id-chip
within the AC adapter and the laptop. Mostly the issue is due to
unprotected 1-wire id-chip getting destroyed, or the laptop
motherboard being damaged. This issue has been known for a long time
and DELL has done nothing to fix it or compensate customers more than
replacing the damaged component within warranty, i.e. AC adapter or
laptop motherboard. There are reports of customers replacing the AC
adapter several times. This indicates that it is a design flaw, wrong
construction that can destroy the id-chip. More info on

http://www.laptops-battery.co.uk/blog/dell-ac-power-adapter-type-cannot
-
be-determined-solution/#content

[end quote]


well,then you buy some "ID chips",and make an adapter that carries
one,and your generic power supply plugs into that adapter.the adapter
stays with the PC when you unplug the PS,so the ID chip doesn't get
destroyed or damaged.
Perhaps you could even wire the ID chip directly to the PC motherboard.
Maybe it just needs a MOV or spike protector across the input.


the "ID chip" design smells(stinks,actually) of deliberate action to
preclude use of inexpensive aftermarket supplies.

HOW does a "one-wire ID chip" work,anyways?

Heh,"one-wire ID chip" sounds like a chip resistor.

HOW does a "one-wire ID chip" work,anyways?

Heh,"one-wire ID chip" sounds like a chip resistor.

Jim Yanik <jyanik_at_abuse.gov> wrote in
news:Xns9D3270153A440jyaniklocalnetcom_at_216.168.3.44:

"N_Cook" <diverse_at_tcp.co.uk> wrote in
news:hmqf2h$ia3$1_at_news.eternal-september.org:

....

it's probably just a resistor value that gets read,forms a voltage
divider and the developed V gets read. Simple,cheap to implement.
No resistor,you get the "insufficient supply" message.


[quote from <http://en.wikipedia.org/wiki/Inspiron>]

"AC power adapter type cannot be determined"

When I startup my computer, I get the message "The AC power adapter type
cannot be determined. Your system will operate slower and the battery will
not charge."

This error occurs due to a communication error between an id-chip within
the AC adapter and the laptop. Mostly the issue is due to unprotected
1-wire id-chip getting destroyed, or the laptop motherboard being damaged.
This issue has been known for a long time and DELL has done nothing to fix
it or compensate customers more than replacing the damaged component
within warranty, i.e. AC adapter or laptop motherboard. There are reports
of customers replacing the AC adapter several times. This indicates that
it is a design flaw, wrong construction that can destroy the id-chip. More
info on

http://www.laptops-battery.co.uk/blog/dell-ac-power-adapter-type-cannot-
be-determined-solution/#content

[end quote]

--
bz

please pardon my infinite ignorance, the set-of-things-I-do-not-know is an
infinite set.

bz <bz+mspep_at_ch100-5.chem.lsu.edu> wrote in message
news:Xns9D34AFBDC5471WQAHBGMXSZHVspammote_at_130.39.198.139...
Jim Yanik <jyanik_at_abuse.gov> wrote in
news:Xns9D3270153A440jyaniklocalnetcom_at_216.168.3.44:

"N_Cook" <diverse_at_tcp.co.uk> wrote in
news:hmqf2h$ia3$1_at_news.eternal-september.org:

....

it's probably just a resistor value that gets read,forms a voltage
divider and the developed V gets read. Simple,cheap to implement.
No resistor,you get the "insufficient supply" message.


[quote from <http://en.wikipedia.org/wiki/Inspiron>]

"AC power adapter type cannot be determined"

When I startup my computer, I get the message "The AC power adapter type
cannot be determined. Your system will operate slower and the battery
will
not charge."

This error occurs due to a communication error between an id-chip within
the AC adapter and the laptop. Mostly the issue is due to unprotected
1-wire id-chip getting destroyed, or the laptop motherboard being
damaged.
This issue has been known for a long time and DELL has done nothing to
fix
it or compensate customers more than replacing the damaged component
within warranty, i.e. AC adapter or laptop motherboard. There are
reports
of customers replacing the AC adapter several times. This indicates that
it is a design flaw, wrong construction that can destroy the id-chip.
More
info on


http://www.laptops-battery.co.uk/blog/dell-ac-power-adapter-type-cannot-
be-determined-solution/#content

[end quote]

--
bz

please pardon my infinite ignorance, the set-of-things-I-do-not-know is
an
infinite set.


That 3 wire problem , not a problem. Have the compaq with me now , took
dvm
readings, chassis ground to outer face of that 3 way line connector, red
DVM
plus probe to chassis on diode test 0.63V forward V, nothing on neg to
ground . Current limited power up on bench supply, needed to switch on pc
before it would charge (maybe my inadequate bodged up dummy 7.3/5mm
connector). No requirement to have third pin connected for this use. No
popup my side of Vista password entry anyway, perhaps a Dell problem and
third wire problems.