Abate Holding Your Breath...Thompson's Design

Here you go...

http://analog-innovations.com/SED/BicycleHubSwitcher.pdf

I figure, if you had a mind to, you could add regulation by running
this dude in burst mode, by stopping the 555 via its RESETbar input.

Diode D7 prevents some really weird behavior from back conduction. If
there were a need to tighten up the efficiency, I'd replace it with
another P-channel, body in the opposite direction from MP1 (for lack
of finding a suitable transistor, modeled as a 0.3 Ohm device
extrapolated from my vast CMOS device library . Then I'd use a
comparator to make the drop like a near ideal diode as in...

http://analog-innovations.com/SED/PerfectDiodeForChargerIsolation.pdf

My experiments with using an auto-transformer would indicate that the
current capability of the hub dynamo (at least as presently modeled...
I'm suspicious of its accuracy)) falls off rapidly, almost acting like
a (near) constant power device.

I'd ask one of the local "pansies in spandex" to make experiments with
their hub dynamos, but I'm their enemy for suggesting publicly that
they should be required to be licensed, and be fined when they go
riding three-abreast down the middle of a thoroughfare, rather than
single-file in the bicycle lane

...Jim Thompson

Here you go...

http://analog-innovations.com/SED/BicycleHubSwitcher.pdf

I figure, if you had a mind to, you could add regulation by running
this dude in burst mode, by stopping the 555 via its RESETbar input.

Diode D7 prevents some really weird behavior from back conduction. If
there were a need to tighten up the efficiency, I'd replace it with
another P-channel, body in the opposite direction from MP1 (for lack
of finding a suitable transistor, modeled as a 0.3 Ohm device
extrapolated from my vast CMOS device library . Then I'd use a
comparator to make the drop like a near ideal diode as in...

http://analog-innovations.com/SED/PerfectDiodeForChargerIsolation.pdf

On Sun, 15 Jan 2012 11:25:07 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon_at_On-My-Web-Site.com> wrote:

Here you go...

http://analog-innovations.com/SED/BicycleHubSwitcher.pdf

I figure, if you had a mind to, you could add regulation by running
this dude in burst mode, by stopping the 555 via its RESETbar input.

Diode D7 prevents some really weird behavior from back conduction. If
there were a need to tighten up the efficiency, I'd replace it with
another P-channel, body in the opposite direction from MP1 (for lack
of finding a suitable transistor, modeled as a 0.3 Ohm device
extrapolated from my vast CMOS device library . Then I'd use a
comparator to make the drop like a near ideal diode as in...

http://analog-innovations.com/SED/PerfectDiodeForChargerIsolation.pdf

My experiments with using an auto-transformer would indicate that the
current capability of the hub dynamo (at least as presently modeled...
I'm suspicious of its accuracy)) falls off rapidly, almost acting like
a (near) constant power device.

I'd ask one of the local "pansies in spandex" to make experiments with
their hub dynamos, but I'm their enemy for suggesting publicly that
they should be required to be licensed, and be fined when they go
riding three-abreast down the middle of a thoroughfare, rather than
single-file in the bicycle lane :-)

...Jim Thompson


Good grief, this is just a fixed-duty-cycle nonregulating buck
switcher. I suggested this architecture days ago.

The 555 drains the battery all the time. If it doesn't, it won't start
up. And there's probably ways to blow out the gate of the p-fet, which
would take out the n-fet as a bonus. Amateur stuff.

You spent four days on *this* ?

"Jim Thompson" <To-Email-Use-The-Envelope-Icon_at_On-My-Web-Site.com> wrote
in message news:rl46h7l10f6046gqr4f93vtmci1cnrle8r_at_4ax.com...
Here you go...

http://analog-innovations.com/SED/BicycleHubSwitcher.pdf

I figure, if you had a mind to, you could add regulation by running
this dude in burst mode, by stopping the 555 via its RESETbar input.

Diode D7 prevents some really weird behavior from back conduction. If
there were a need to tighten up the efficiency, I'd replace it with
another P-channel, body in the opposite direction from MP1 (for lack
of finding a suitable transistor, modeled as a 0.3 Ohm device
extrapolated from my vast CMOS device library . Then I'd use a
comparator to make the drop like a near ideal diode as in...

http://analog-innovations.com/SED/PerfectDiodeForChargerIsolation.pdf


Component values included!

Cheers

"Jim Thompson" <To-Email-Use-The-Envelope-Icon_at_On-My-Web-Site.com> wrote
in message news:rl46h7l10f6046gqr4f93vtmci1cnrle8r_at_4ax.com...
Here you go...

http://analog-innovations.com/SED/BicycleHubSwitcher.pdf

I figure, if you had a mind to, you could add regulation by running
this dude in burst mode, by stopping the 555 via its RESETbar input.

Diode D7 prevents some really weird behavior from back conduction. If
there were a need to tighten up the efficiency, I'd replace it with
another P-channel, body in the opposite direction from MP1 (for lack
of finding a suitable transistor, modeled as a 0.3 Ohm device
extrapolated from my vast CMOS device library . Then I'd use a
comparator to make the drop like a near ideal diode as in...

http://analog-innovations.com/SED/PerfectDiodeForChargerIsolation.pdf


Component values included!

Cheers

On Sun, 15 Jan 2012 16:43:18 -0500, "Martin Riddle"
martin_rid_at_verizon.net> wrote:


"Jim Thompson" <To-Email-Use-The-Envelope-Icon_at_On-My-Web-Site.com> wrote
in message news:rl46h7l10f6046gqr4f93vtmci1cnrle8r_at_4ax.com...
Here you go...

http://analog-innovations.com/SED/BicycleHubSwitcher.pdf

I figure, if you had a mind to, you could add regulation by running
this dude in burst mode, by stopping the 555 via its RESETbar input.

Diode D7 prevents some really weird behavior from back conduction. If
there were a need to tighten up the efficiency, I'd replace it with
another P-channel, body in the opposite direction from MP1 (for lack
of finding a suitable transistor, modeled as a 0.3 Ohm device
extrapolated from my vast CMOS device library . Then I'd use a
comparator to make the drop like a near ideal diode as in...

http://analog-innovations.com/SED/PerfectDiodeForChargerIsolation.pdf


Component values included!

Cheers



I always do that. I had that info the very first day, as I alluded in
an early post (I verbally provided the results, same as the sims now
posted... which got me "naa, naa, naa poo poo"), so I just let Larkin
run off at the mouth, just for the sport of it ;-)

...Jim Thompson

"Jim Thompson" <To-Email-Use-The-Envelope-Icon_at_On-My-Web-Site.com> wrote in
message news:b2j6h717i1jdjmke4of6tu5od3i4pcu94g_at_4ax.com...
On Sun, 15 Jan 2012 16:43:18 -0500, "Martin Riddle"
martin_rid_at_verizon.net> wrote:


"Jim Thompson" <To-Email-Use-The-Envelope-Icon_at_On-My-Web-Site.com> wrote
in message news:rl46h7l10f6046gqr4f93vtmci1cnrle8r_at_4ax.com...
Here you go...

http://analog-innovations.com/SED/BicycleHubSwitcher.pdf

I figure, if you had a mind to, you could add regulation by running
this dude in burst mode, by stopping the 555 via its RESETbar input.

Diode D7 prevents some really weird behavior from back conduction. If
there were a need to tighten up the efficiency, I'd replace it with
another P-channel, body in the opposite direction from MP1 (for lack
of finding a suitable transistor, modeled as a 0.3 Ohm device
extrapolated from my vast CMOS device library . Then I'd use a
comparator to make the drop like a near ideal diode as in...

http://analog-innovations.com/SED/PerfectDiodeForChargerIsolation.pdf


Component values included!

Cheers



I always do that. I had that info the very first day, as I alluded in
an early post (I verbally provided the results, same as the sims now
posted... which got me "naa, naa, naa poo poo"), so I just let Larkin
run off at the mouth, just for the sport of it ;-)

...Jim Thompson


You might impress a few simple people, but it certainly won't do what I set
out to achieve.

On Sun, 15 Jan 2012 22:15:02 -0000, "Ian Field"
gangprobing.alien_at_ntlworld.com> wrote:


"Jim Thompson" <To-Email-Use-The-Envelope-Icon_at_On-My-Web-Site.com> wrote in
message news:b2j6h717i1jdjmke4of6tu5od3i4pcu94g_at_4ax.com...
On Sun, 15 Jan 2012 16:43:18 -0500, "Martin Riddle"
martin_rid_at_verizon.net> wrote:

[snip]

Component values included!

Cheers



I always do that. I had that info the very first day, as I alluded in
an early post (I verbally provided the results, same as the sims now
posted... which got me "naa, naa, naa poo poo"), so I just let Larkin
run off at the mouth, just for the sport of it ;-)

...Jim Thompson


You might impress a few simple people, but it certainly won't do what I set
out to achieve.


JF will love it, since it has a 555.

John

On Sun, 15 Jan 2012 22:15:02 -0000, "Ian Field"
gangprobing.alien_at_ntlworld.com> wrote:


"Jim Thompson" <To-Email-Use-The-Envelope-Icon_at_On-My-Web-Site.com> wrote
in
message news:b2j6h717i1jdjmke4of6tu5od3i4pcu94g_at_4ax.com...
On Sun, 15 Jan 2012 16:43:18 -0500, "Martin Riddle"
martin_rid_at_verizon.net> wrote:


"Jim Thompson" <To-Email-Use-The-Envelope-Icon_at_On-My-Web-Site.com> wrote
in message news:rl46h7l10f6046gqr4f93vtmci1cnrle8r_at_4ax.com...
Here you go...

http://analog-innovations.com/SED/BicycleHubSwitcher.pdf

I figure, if you had a mind to, you could add regulation by running
this dude in burst mode, by stopping the 555 via its RESETbar input.

Diode D7 prevents some really weird behavior from back conduction. If
there were a need to tighten up the efficiency, I'd replace it with
another P-channel, body in the opposite direction from MP1 (for lack
of finding a suitable transistor, modeled as a 0.3 Ohm device
extrapolated from my vast CMOS device library . Then I'd use a
comparator to make the drop like a near ideal diode as in...

http://analog-innovations.com/SED/PerfectDiodeForChargerIsolation.pdf


Component values included!

Cheers



I always do that. I had that info the very first day, as I alluded in
an early post (I verbally provided the results, same as the sims now
posted... which got me "naa, naa, naa poo poo"), so I just let Larkin
run off at the mouth, just for the sport of it ;-)

...Jim Thompson


You might impress a few simple people, but it certainly won't do what I
set
out to achieve.


JF will love it, since it has a 555.

"John Larkin" <jjlarkin_at_highNOTlandTHIStechnologyPART.com> wrote in message
news:beo6h79pqhktoco07ai80dpim06cri41kt_at_4ax.com...
On Sun, 15 Jan 2012 22:15:02 -0000, "Ian Field"
gangprobing.alien_at_ntlworld.com> wrote:


"Jim Thompson" <To-Email-Use-The-Envelope-Icon_at_On-My-Web-Site.com> wrote
in
message news:b2j6h717i1jdjmke4of6tu5od3i4pcu94g_at_4ax.com...
On Sun, 15 Jan 2012 16:43:18 -0500, "Martin Riddle"
martin_rid_at_verizon.net> wrote:


"Jim Thompson" <To-Email-Use-The-Envelope-Icon_at_On-My-Web-Site.com> wrote
in message news:rl46h7l10f6046gqr4f93vtmci1cnrle8r_at_4ax.com...
Here you go...

http://analog-innovations.com/SED/BicycleHubSwitcher.pdf

I figure, if you had a mind to, you could add regulation by running
this dude in burst mode, by stopping the 555 via its RESETbar input.

Diode D7 prevents some really weird behavior from back conduction. If
there were a need to tighten up the efficiency, I'd replace it with
another P-channel, body in the opposite direction from MP1 (for lack
of finding a suitable transistor, modeled as a 0.3 Ohm device
extrapolated from my vast CMOS device library . Then I'd use a
comparator to make the drop like a near ideal diode as in...

http://analog-innovations.com/SED/PerfectDiodeForChargerIsolation.pdf


Component values included!

Cheers



I always do that. I had that info the very first day, as I alluded in
an early post (I verbally provided the results, same as the sims now
posted... which got me "naa, naa, naa poo poo"), so I just let Larkin
run off at the mouth, just for the sport of it ;-)

...Jim Thompson


You might impress a few simple people, but it certainly won't do what I
set
out to achieve.


JF will love it, since it has a 555.

It may have been possible to achieve something aproximating to regulation by
externally pulling the 5k/5k/5k divider, but it would be a huge comromise.

There's a schematic taking shape and tempting me to put pen to paper.

But I'm inclined not to do it all for the 2 principle knowitalls that in
reality don't know a fraction of what they'd like us to believe.

On Mon, 16 Jan 2012 16:04:10 -0000, "Ian Field"
gangprobing.alien_at_ntlworld.com> wrote:


"John Larkin" <jjlarkin_at_highNOTlandTHIStechnologyPART.com> wrote in
message
news:beo6h79pqhktoco07ai80dpim06cri41kt_at_4ax.com...
On Sun, 15 Jan 2012 22:15:02 -0000, "Ian Field"
gangprobing.alien_at_ntlworld.com> wrote:


"Jim Thompson" <To-Email-Use-The-Envelope-Icon_at_On-My-Web-Site.com> wrote
in
message news:b2j6h717i1jdjmke4of6tu5od3i4pcu94g_at_4ax.com...
On Sun, 15 Jan 2012 16:43:18 -0500, "Martin Riddle"
martin_rid_at_verizon.net> wrote:


"Jim Thompson" <To-Email-Use-The-Envelope-Icon_at_On-My-Web-Site.com
wrote
in message news:rl46h7l10f6046gqr4f93vtmci1cnrle8r_at_4ax.com...
Here you go...

http://analog-innovations.com/SED/BicycleHubSwitcher.pdf

I figure, if you had a mind to, you could add regulation by running
this dude in burst mode, by stopping the 555 via its RESETbar input.

Diode D7 prevents some really weird behavior from back conduction.
If
there were a need to tighten up the efficiency, I'd replace it with
another P-channel, body in the opposite direction from MP1 (for lack
of finding a suitable transistor, modeled as a 0.3 Ohm device
extrapolated from my vast CMOS device library . Then I'd use a
comparator to make the drop like a near ideal diode as in...

http://analog-innovations.com/SED/PerfectDiodeForChargerIsolation.pdf


Component values included!

Cheers



I always do that. I had that info the very first day, as I alluded in
an early post (I verbally provided the results, same as the sims now
posted... which got me "naa, naa, naa poo poo"), so I just let Larkin
run off at the mouth, just for the sport of it ;-)

...Jim Thompson


You might impress a few simple people, but it certainly won't do what I
set
out to achieve.


JF will love it, since it has a 555.

It may have been possible to achieve something aproximating to regulation
by
externally pulling the 5k/5k/5k divider, but it would be a huge comromise.

There's a schematic taking shape and tempting me to put pen to paper.

But I'm inclined not to do it all for the 2 principle knowitalls that in
reality don't know a fraction of what they'd like us to believe.


I don't think the problem has been clearly stated. What is this
circuit supposed to do, and what is the user interface? Jim's circuit
leaves the lights on all the time, runs the 555 all the time, and
loads the alternator whenever it can, and probably blows out the fets
now and then. That doesn't sound like what anybody would want on their
bicycle

And who wants to lug around a 20 mH power inductor that dissipates a
couple of watts?

"John Larkin" <jjlar...@highNOTlandTHIStechnologyPART.com> wrote in message

news:gp76h7lk76sof6lr92n2u5lbh9ic7mq1q3_at_4ax.com...





On Sun, 15 Jan 2012 11:25:07 -0700, Jim Thompson
To-Email-Use-The-Envelope-I...@On-My-Web-Site.com> wrote:

Here you go...

http://analog-innovations.com/SED/BicycleHubSwitcher.pdf

I figure, if you had a mind to, you could add regulation by running
this dude in burst mode, by stopping the 555 via its RESETbar input.

Diode D7 prevents some really weird behavior from back conduction.  If
there were a need to tighten up the efficiency, I'd replace it with
another P-channel, body in the opposite direction from MP1 (for lack
of finding a suitable transistor, modeled as a 0.3 Ohm device
extrapolated from my vast CMOS device library .  Then I'd use a
comparator to make the drop like a near ideal diode as in...

http://analog-innovations.com/SED/PerfectDiodeForChargerIsolation.pdf

My experiments with using an auto-transformer would indicate that the
current capability of the hub dynamo (at least as presently modeled...
I'm suspicious of its accuracy)) falls off rapidly, almost acting like
a (near) constant power device.

I'd ask one of the local "pansies in spandex" to make experiments with
their hub dynamos, but I'm their enemy for suggesting publicly that
they should be required to be licensed, and be fined when they go
riding three-abreast down the middle of a thoroughfare, rather than
single-file in the bicycle lane :-)

                                       ...Jim Thompson

Good grief, this is just a fixed-duty-cycle nonregulating buck
switcher. I suggested this architecture days ago.

The 555 drains the battery all the time. If it doesn't, it won't start
up. And there's probably ways to blow out the gate of the p-fet, which
would take out the n-fet as a bonus. Amateur stuff.

You spent four days on *this* ?

My thoughts are along the lines; a couple of comparators flipping a bistable
with a 3rd comparator as a UVLO, that's to prevent the buck from latchin up
in 100% MSR when it draws enough current to drag the generator voltage below
its optimum load curve.

Not put pen to paper yet, I'd rather find time to fully study the tables &
graphs from the link Marcell posted first.- Hide quoted text -

- Show quoted text -

On Sun, 15 Jan 2012 11:25:07 -0700, Jim Thompson





To-Email-Use-The-Envelope-I...@On-My-Web-Site.com> wrote:
Here you go...

http://analog-innovations.com/SED/BicycleHubSwitcher.pdf

I figure, if you had a mind to, you could add regulation by running
this dude in burst mode, by stopping the 555 via its RESETbar input.

Diode D7 prevents some really weird behavior from back conduction.  If
there were a need to tighten up the efficiency, I'd replace it with
another P-channel, body in the opposite direction from MP1 (for lack
of finding a suitable transistor, modeled as a 0.3 Ohm device
extrapolated from my vast CMOS device library .  Then I'd use a
comparator to make the drop like a near ideal diode as in...

http://analog-innovations.com/SED/PerfectDiodeForChargerIsolation.pdf

My experiments with using an auto-transformer would indicate that the
current capability of the hub dynamo (at least as presently modeled...
I'm suspicious of its accuracy)) falls off rapidly, almost acting like
a (near) constant power device.

I'd ask one of the local "pansies in spandex" to make experiments with
their hub dynamos, but I'm their enemy for suggesting publicly that
they should be required to be licensed, and be fined when they go
riding three-abreast down the middle of a thoroughfare, rather than
single-file in the bicycle lane :-)

                                       ...Jim Thompson

Good grief, this is just a fixed-duty-cycle nonregulating buck
switcher. I suggested this architecture days ago.

The 555 drains the battery all the time. If it doesn't, it won't start
up. And there's probably ways to blow out the gate of the p-fet, which
would take out the n-fet as a bonus. Amateur stuff.

You spent four days on *this* ?

John- Hide quoted text -

- Show quoted text -

"John Larkin" <jjlarkin_at_highNOTlandTHIStechnologyPART.com> wrote in message
news:6bl8h79lptnrgmq7ohuai7rkg2uhivp8d5_at_4ax.com...
On Mon, 16 Jan 2012 16:04:10 -0000, "Ian Field"
gangprobing.alien_at_ntlworld.com> wrote:


"John Larkin" <jjlarkin_at_highNOTlandTHIStechnologyPART.com> wrote in
message
news:beo6h79pqhktoco07ai80dpim06cri41kt_at_4ax.com...
On Sun, 15 Jan 2012 22:15:02 -0000, "Ian Field"
gangprobing.alien_at_ntlworld.com> wrote:


"Jim Thompson" <To-Email-Use-The-Envelope-Icon_at_On-My-Web-Site.com> wrote
in
message news:b2j6h717i1jdjmke4of6tu5od3i4pcu94g_at_4ax.com...
On Sun, 15 Jan 2012 16:43:18 -0500, "Martin Riddle"
martin_rid_at_verizon.net> wrote:


"Jim Thompson" <To-Email-Use-The-Envelope-Icon_at_On-My-Web-Site.com
wrote
in message news:rl46h7l10f6046gqr4f93vtmci1cnrle8r_at_4ax.com...
Here you go...

http://analog-innovations.com/SED/BicycleHubSwitcher.pdf

I figure, if you had a mind to, you could add regulation by running
this dude in burst mode, by stopping the 555 via its RESETbar input.

Diode D7 prevents some really weird behavior from back conduction.
If
there were a need to tighten up the efficiency, I'd replace it with
another P-channel, body in the opposite direction from MP1 (for lack
of finding a suitable transistor, modeled as a 0.3 Ohm device
extrapolated from my vast CMOS device library . Then I'd use a
comparator to make the drop like a near ideal diode as in...

http://analog-innovations.com/SED/PerfectDiodeForChargerIsolation.pdf


Component values included!

Cheers



I always do that. I had that info the very first day, as I alluded in
an early post (I verbally provided the results, same as the sims now
posted... which got me "naa, naa, naa poo poo"), so I just let Larkin
run off at the mouth, just for the sport of it ;-)

...Jim Thompson


You might impress a few simple people, but it certainly won't do what I
set
out to achieve.


JF will love it, since it has a 555.

It may have been possible to achieve something aproximating to regulation
by
externally pulling the 5k/5k/5k divider, but it would be a huge comromise.

There's a schematic taking shape and tempting me to put pen to paper.

But I'm inclined not to do it all for the 2 principle knowitalls that in
reality don't know a fraction of what they'd like us to believe.


I don't think the problem has been clearly stated. What is this
circuit supposed to do, and what is the user interface? Jim's circuit
leaves the lights on all the time, runs the 555 all the time, and
loads the alternator whenever it can, and probably blows out the fets
now and then. That doesn't sound like what anybody would want on their
bicycle

I'm thinking maximise the minimalist.

A window comparator wired-or'ed to a bistable to switch the pass transistor,
a 3rd comparator also wired-or'ed to the bistable as UVLO so it can't go
100% at times of high demand.
.

And who wants to lug around a 20 mH power inductor that dissipates a
couple of watts?

Eh! - that's more than the rated output of the 'dynamo'.