Power Bank Keepalive...

[Don]

Many consumer grade USB power banks come with a built-in
automatic shutdown circuit. Light loads, such as the nominal
6.8 μA drawn by a portable MP3 player, are not enough to
prevent shutdown. To compensate, this project uses
a 555 to nominally pull 100 mA every 5.5 seconds.

( excerpt - read more at https://crcomp.net/mp3mod/index.php )

Danke,

--
Don, KB7RPU, https://www.qsl.net/kb7rpu
There was a young lady named Bright Whose speed was far faster than light;
She set out one day In a relative way And returned on the previous night.

 

[a a]

On Saturday, 11 June 2022 at 23:04:48 UTC+2, Don wrote:

Many consumer grade USB power banks come with a built-in
automatic shutdown circuit. Light loads, such as the nominal
6.8 μA drawn by a portable MP3 player, are not enough to
prevent shutdown. To compensate, this project uses
a 555 to nominally pull 100 mA every 5.5 seconds.

( excerpt - read more at https://crcomp.net/mp3mod/index.php )

Danke,

--
Don, KB7RPU, https://www.qsl.net/kb7rpu
There was a young lady named Bright Whose speed was far faster than light;
She set out one day In a relative way And returned on the previous night.
smart powerbanks come 2 usb sockets, so you just connect your MP3 player to one usb socket and LED light to 2nd usb socket to keep it on.

Smart MP3 platers come with internal battery, you can charge from power bank

 

[Don]

a a <manta103g@gmail.com> wrote:

On Saturday, 11 June 2022 at 23:04:48 UTC+2, Don wrote:
Many consumer grade USB power banks come with a built-in
automatic shutdown circuit. Light loads, such as the nominal
6.8 μA drawn by a portable MP3 player, are not enough to
prevent shutdown. To compensate, this project uses
a 555 to nominally pull 100 mA every 5.5 seconds.

( excerpt - read more at https://crcomp.net/mp3mod/index.php )

smart powerbanks come 2 usb sockets, so you just connect your MP3 player
to one usb socket and LED light to 2nd usb socket to keep it on.

Smart MP3 platers come with internal battery, you can charge from power bank

Your blatantly obvious approach was the first solution attempted by me.
It was eventually, reluctantly, rejected because it doesn\'t work out so
well in practice. Read the link to find out why.

Danke,

--
Don, KB7RPU, https://www.qsl.net/kb7rpu
There was a young lady named Bright Whose speed was far faster than light;
She set out one day In a relative way And returned on the previous night.

 

[a a]

On Saturday, 11 June 2022 at 23:43:26 UTC+2, Don wrote:

a a <mant...@gmail.com> wrote:
On Saturday, 11 June 2022 at 23:04:48 UTC+2, Don wrote:
Many consumer grade USB power banks come with a built-in
automatic shutdown circuit. Light loads, such as the nominal
6.8 μA drawn by a portable MP3 player, are not enough to
prevent shutdown. To compensate, this project uses
a 555 to nominally pull 100 mA every 5.5 seconds.

( excerpt - read more at https://crcomp.net/mp3mod/index.php )
smart powerbanks come 2 usb sockets, so you just connect your MP3 player
to one usb socket and LED light to 2nd usb socket to keep it on.

Smart MP3 platers come with internal battery, you can charge from power bank
Your blatantly obvious approach was the first solution attempted by me.
It was eventually, reluctantly, rejected because it doesn\'t work out so
well in practice. Read the link to find out why.
Danke,

--
Don, KB7RPU, https://www.qsl.net/kb7rpu
There was a young lady named Bright Whose speed was far faster than light;
She set out one day In a relative way And returned on the previous night.

MP3 player is an ancienct product, no more offered on a market.
Most guys prefer smartphone to get and play back music.

 

[server]

On Sat, 11 Jun 2022 21:04:41 -0000 (UTC), \"Don\" <g@crcomp.net> wrote:

Many consumer grade USB power banks come with a built-in
automatic shutdown circuit. Light loads, such as the nominal
6.8 ?A drawn by a portable MP3 player, are not enough to
prevent shutdown. To compensate, this project uses
a 555 to nominally pull 100 mA every 5.5 seconds.

( excerpt - read more at https://crcomp.net/mp3mod/index.php )

Danke,

Maybe just a capacitor would keep it alive.



--

Anybody can count to one.

- Robert Widlar

 

[boB]

On Sat, 11 Jun 2022 21:04:41 -0000 (UTC), \"Don\" <g@crcomp.net> wrote:

Many consumer grade USB power banks come with a built-in
automatic shutdown circuit. Light loads, such as the nominal
6.8 ?A drawn by a portable MP3 player, are not enough to
prevent shutdown. To compensate, this project uses
a 555 to nominally pull 100 mA every 5.5 seconds.

( excerpt - read more at https://crcomp.net/mp3mod/index.php )

Danke,

forgot the \'u\' in microamps.

I thought, what USB can supply 6 AMPS ?!?!

boB

 

[Don]

a a wrote:

Don wrote:
a a wrote:
Don wrote:
Many consumer grade USB power banks come with a built-in
automatic shutdown circuit. Light loads, such as the nominal
6.8 μA drawn by a portable MP3 player, are not enough to
prevent shutdown. To compensate, this project uses
a 555 to nominally pull 100 mA every 5.5 seconds.

( excerpt - read more at https://crcomp.net/mp3mod/index.php )
smart powerbanks come 2 usb sockets, so you just connect your MP3 player
to one usb socket and LED light to 2nd usb socket to keep it on.

Smart MP3 platers come with internal battery, you can charge from power bank
Your blatantly obvious approach was the first solution attempted by me.
It was eventually, reluctantly, rejected because it doesn\'t work out so
well in practice. Read the link to find out why.

MP3 player is an ancient product, no more offered on a market.
Most guys prefer smartphone to get and play back music.

It sounds about right - you\'re probably correct in regards to what most
people do. They use their phone to download MP3s from the Inet.
OTOH, my phone is used strictly for phone calls, SMS, and
photographs. By choice, it never connects to the Inet.
A plain MP3 player appeals to me in the same manner as a unix
command - it does only one job and it does it well. In this case, it
plays MP3s pre-loaded onto an SD card. And it actually is still sold on
ebay. There\'s a link to a retailer on my page.

Upon further reflection, your LED idea certainly works as a replacement
for the 555 circuit. It\'s a tradeoff - LED simplicity versus 555
efficiency. As is, the 555\'s about 18 times more efficient. It\'s
probably doable to make it 40 - 50 times more efficient.

The simultaneous use of both USB outputs didn\'t work for me. Nor did the
simultaneous use of an external and internal battery. The back of the
Power Bank states \"Output: 5 V DC, 1 A or 2.1 A.\" There\'s two lightening
bolts next to one of the USB outputs, while the other has only a single
bolt. Presumably the former\'s for 2A. Anyhow, it seems to imply you can
either use one or the other, ???but not both???

Danke,

--
Don, KB7RPU, https://www.qsl.net/kb7rpu
There was a young lady named Bright Whose speed was far faster than light;
She set out one day In a relative way And returned on the previous night.

 

[Don]

boB wrote:

Don wrote:

Many consumer grade USB power banks come with a built-in
automatic shutdown circuit. Light loads, such as the nominal
6.8 ?A drawn by a portable MP3 player, are not enough to
prevent shutdown. To compensate, this project uses
a 555 to nominally pull 100 mA every 5.5 seconds.

( excerpt - read more at https://crcomp.net/mp3mod/index.php )

forgot the \'u\' in microamps.

I thought, what USB can supply 6 AMPS ?!?!

The back label on my Power Banks boasts it can supply 5 V DC at 2.1 A
for 5,000 mAh.

Anyhow, my message is UTF-8 encoded. The question mark between the 6.8
and A is actually a Greek mu character.

Danke,

--
Don, KB7RPU, https://www.qsl.net/kb7rpu
There was a young lady named Bright Whose speed was far faster than light;
She set out one day In a relative way And returned on the previous night.

 

[Don]

jlarkin@highlandsniptechnology.com wrote:

Don wrote:

Many consumer grade USB power banks come with a built-in
automatic shutdown circuit. Light loads, such as the nominal
6.8 ?A drawn by a portable MP3 player, are not enough to
prevent shutdown. To compensate, this project uses
a 555 to nominally pull 100 mA every 5.5 seconds.

( excerpt - read more at https://crcomp.net/mp3mod/index.php )

Maybe just a capacitor would keep it alive.

The Power Bank doesn\'t show a garbage can with an X through it as is
typically found on Li-Ion batteries. For all I know the Power Bank /is/
just a capacitor.
It\'s the perfect size - about half the length of a smart phone. The
whole gadget fits nicely into my pocket with plenty of space left over
for a small flashlight and a Swiss army knife.

Danke,

--
Don, KB7RPU, https://www.qsl.net/kb7rpu
There was a young lady named Bright Whose speed was far faster than light;
She set out one day In a relative way And returned on the previous night.

 

[rbowman]

On 06/11/2022 04:21 PM, a a wrote:

On Saturday, 11 June 2022 at 23:43:26 UTC+2, Don wrote:
a a <mant...@gmail.com> wrote:
On Saturday, 11 June 2022 at 23:04:48 UTC+2, Don wrote:
Many consumer grade USB power banks come with a built-in
automatic shutdown circuit. Light loads, such as the nominal
6.8 μA drawn by a portable MP3 player, are not enough to
prevent shutdown. To compensate, this project uses
a 555 to nominally pull 100 mA every 5.5 seconds.

( excerpt - read more at https://crcomp.net/mp3mod/index.php )
smart powerbanks come 2 usb sockets, so you just connect your MP3 player
to one usb socket and LED light to 2nd usb socket to keep it on.

Smart MP3 platers come with internal battery, you can charge from power bank
Your blatantly obvious approach was the first solution attempted by me.
It was eventually, reluctantly, rejected because it doesn\'t work out so
well in practice. Read the link to find out why.
Danke,

--
Don, KB7RPU, https://www.qsl.net/kb7rpu
There was a young lady named Bright Whose speed was far faster than light;
She set out one day In a relative way And returned on the previous night.
MP3 player is an ancienct product, no more offered on a market.
Most guys prefer smartphone to get and play back music.

I was surprised a couple of years ago when I went to Best Buy to get an
MP3 player and they only had one, one piece that is, not one model.

The question remains which would I rather take to the gym and possibly
destroy, a $30 SanDisk Jam or a smart phone. Which is more convenient to
clip to my t-shirt? Even though I don\'t have a $1000 smart phone it\'s
still not a hard question.

 

[legg]

On Sat, 11 Jun 2022 21:04:41 -0000 (UTC), \"Don\" <g@crcomp.net> wrote:

Many consumer grade USB power banks come with a built-in
automatic shutdown circuit. Light loads, such as the nominal
6.8 ?A drawn by a portable MP3 player, are not enough to
prevent shutdown. To compensate, this project uses
a 555 to nominally pull 100 mA every 5.5 seconds.

( excerpt - read more at https://crcomp.net/mp3mod/index.php )

Danke,

When the MP3 player is drawing uA, it means that its own
internal battery is charged up. Who cares if the external
bank shuts down ?

If the MP3 player internal battery is low, it should draw
current from the external bank, to recharge, when present.

If your external battery bank is misbehaving, you should
consider using another that doesn\'t.

If the mp3 Player is misbehaving, then ditto.

\'Smart\' battery electronics are configured, modified
and patched by imbeciles.

Portable MP3 players are available that offer trouble-free
operation from a single charge, at moderate volume levels,
for >12hrs. No fuss - no muss - no bother.

RL

 

[Don]

Don wrote:

jlarkin@highlandsniptechnology.com wrote:
Don wrote:

Many consumer grade USB power banks come with a built-in
automatic shutdown circuit. Light loads, such as the nominal
6.8 ?A drawn by a portable MP3 player, are not enough to
prevent shutdown. To compensate, this project uses
a 555 to nominally pull 100 mA every 5.5 seconds.

( excerpt - read more at https://crcomp.net/mp3mod/index.php )

Maybe just a capacitor would keep it alive.

The Power Bank doesn\'t show a garbage can with an X through it as is
typically found on Li-Ion batteries. For all I know the Power Bank /is/
just a capacitor.
It\'s the perfect size - about half the length of a smart phone. The
whole gadget fits nicely into my pocket with plenty of space left over
for a small flashlight and a Swiss army knife.

In the light of a new day, my caffeine enhanced neurons now understand
your intention to use a capacitor to replace the 555 and not the Power
Bank. It probably won\'t work because MP3 chips seem super sensitive to
the slightest power disruption, no matter how short.
IOW the Power Bank must first automatically shutdown before the
capacitor kicks in. And, most likely, the oh-so-brief, transient voltage
droop triggers the MP3 player to replay its current audio track from the
beginning.

Danke,

--
Don, KB7RPU, https://www.qsl.net/kb7rpu
There was a young lady named Bright Whose speed was far faster than light;
She set out one day In a relative way And returned on the previous night.

 

[Don]

legg wrote:

Don wrote:

Many consumer grade USB power banks come with a built-in
automatic shutdown circuit. Light loads, such as the nominal
6.8 ?A drawn by a portable MP3 player, are not enough to
prevent shutdown. To compensate, this project uses
a 555 to nominally pull 100 mA every 5.5 seconds.

( excerpt - read more at https://crcomp.net/mp3mod/index.php )

When the MP3 player is drawing uA, it means that its own
internal battery is charged up. Who cares if the external
bank shuts down ?

If the MP3 player internal battery is low, it should draw
current from the external bank, to recharge, when present.

If your external battery bank is misbehaving, you should
consider using another that doesn\'t.

If the mp3 Player is misbehaving, then ditto.

\'Smart\' battery electronics are configured, modified
and patched by imbeciles.

Portable MP3 players are available that offer trouble-free
operation from a single charge, at moderate volume levels,
for >12hrs. No fuss - no muss - no bother.

My MP3 contraption was originally connected to a half-depleted Power
Bank (too lazy to fully charge it beforehand) with half of its power
consumption LED indicators dark. And it\'s now been used for about fifty
hours with no change in indicators. In the end, instead of hours, the
Power Bank may last for /seasons/.

My 555 keep-alive is the tail end of a long process. It entailed
experimentation on a couple of different MP3 players and Power Banks.
It all cases, the simultaneous use of internal and external batteries
and/or USB Power Bank ports ended in failure.

My goal never was to advance the state of the art. It was always to
simply listen to MP3s during treks and spins, from a SD inserted into
a cheap, disposable (eg no tears if lost/broken) MP3 player.

From a metaphysical perspective, my keep-live functions as absurdist,
modern art. An attempt to add an old fashioned ON/OFF switch to a
device created by an industry with an unhealthy obsession for baroque,
Rube Goldbergist switches.

Danke,

--
Don, KB7RPU, https://www.qsl.net/kb7rpu
There was a young lady named Bright Whose speed was far faster than light;
She set out one day In a relative way And returned on the previous night.

 

[server]

On Sun, 12 Jun 2022 14:47:29 -0000 (UTC), \"Don\" <g@crcomp.net> wrote:

Don wrote:
jlarkin@highlandsniptechnology.com wrote:
Don wrote:

Many consumer grade USB power banks come with a built-in
automatic shutdown circuit. Light loads, such as the nominal
6.8 ?A drawn by a portable MP3 player, are not enough to
prevent shutdown. To compensate, this project uses
a 555 to nominally pull 100 mA every 5.5 seconds.

( excerpt - read more at https://crcomp.net/mp3mod/index.php )

Maybe just a capacitor would keep it alive.

The Power Bank doesn\'t show a garbage can with an X through it as is
typically found on Li-Ion batteries. For all I know the Power Bank /is/
just a capacitor.
It\'s the perfect size - about half the length of a smart phone. The
whole gadget fits nicely into my pocket with plenty of space left over
for a small flashlight and a Swiss army knife.

In the light of a new day, my caffeine enhanced neurons now understand
your intention to use a capacitor to replace the 555 and not the Power
Bank. It probably won\'t work because MP3 chips seem super sensitive to
the slightest power disruption, no matter how short.
IOW the Power Bank must first automatically shutdown before the
capacitor kicks in. And, most likely, the oh-so-brief, transient voltage
droop triggers the MP3 player to replay its current audio track from the
beginning.

Danke,

Maybe a cap across the UPS ac output will make current that fools the
load sensor into thinking there is always a load. The cap will
dissipate no power.

It wouldn\'t be hard to try.



--

Anybody can count to one.

- Robert Widlar

 

[Ricky]

On Sunday, June 12, 2022 at 11:41:11 AM UTC-4, jla...@highlandsniptechnology.com wrote:

On Sun, 12 Jun 2022 14:47:29 -0000 (UTC), \"Don\" <g...@crcomp.net> wrote:

Don wrote:
jla...@highlandsniptechnology.com wrote:
Don wrote:

Many consumer grade USB power banks come with a built-in
automatic shutdown circuit. Light loads, such as the nominal
6.8 ?A drawn by a portable MP3 player, are not enough to
prevent shutdown. To compensate, this project uses
a 555 to nominally pull 100 mA every 5.5 seconds.

( excerpt - read more at https://crcomp.net/mp3mod/index.php )

Maybe just a capacitor would keep it alive.

The Power Bank doesn\'t show a garbage can with an X through it as is
typically found on Li-Ion batteries. For all I know the Power Bank /is/
just a capacitor.
It\'s the perfect size - about half the length of a smart phone. The
whole gadget fits nicely into my pocket with plenty of space left over
for a small flashlight and a Swiss army knife.

In the light of a new day, my caffeine enhanced neurons now understand
your intention to use a capacitor to replace the 555 and not the Power
Bank. It probably won\'t work because MP3 chips seem super sensitive to
the slightest power disruption, no matter how short.
IOW the Power Bank must first automatically shutdown before the
capacitor kicks in. And, most likely, the oh-so-brief, transient voltage
droop triggers the MP3 player to replay its current audio track from the
beginning.

Danke,
Maybe a cap across the UPS ac output will make current that fools the
load sensor into thinking there is always a load. The cap will
dissipate no power.

It wouldn\'t be hard to try.

Not a UPS, a power bank. No AC output.

--

Rick C.

- Get 1,000 miles of free Supercharging
- Tesla referral code - https://ts.la/richard11209

 

[legg]

On Sat, 11 Jun 2022 20:31:06 -0600, rbowman <bowman@montana.com>
wrote:

On 06/11/2022 04:21 PM, a a wrote:
On Saturday, 11 June 2022 at 23:43:26 UTC+2, Don wrote:
a a <mant...@gmail.com> wrote:
On Saturday, 11 June 2022 at 23:04:48 UTC+2, Don wrote:
Many consumer grade USB power banks come with a built-in
automatic shutdown circuit. Light loads, such as the nominal
6.8 ?A drawn by a portable MP3 player, are not enough to
prevent shutdown. To compensate, this project uses
a 555 to nominally pull 100 mA every 5.5 seconds.

( excerpt - read more at https://crcomp.net/mp3mod/index.php )
smart powerbanks come 2 usb sockets, so you just connect your MP3 player
to one usb socket and LED light to 2nd usb socket to keep it on.

Smart MP3 platers come with internal battery, you can charge from power bank
Your blatantly obvious approach was the first solution attempted by me.
It was eventually, reluctantly, rejected because it doesn\'t work out so
well in practice. Read the link to find out why.
Danke,

--
Don, KB7RPU, https://www.qsl.net/kb7rpu
There was a young lady named Bright Whose speed was far faster than light;
She set out one day In a relative way And returned on the previous night.
MP3 player is an ancienct product, no more offered on a market.
Most guys prefer smartphone to get and play back music.


I was surprised a couple of years ago when I went to Best Buy to get an
MP3 player and they only had one, one piece that is, not one model.

The question remains which would I rather take to the gym and possibly
destroy, a $30 SanDisk Jam or a smart phone. Which is more convenient to
clip to my t-shirt? Even though I don\'t have a $1000 smart phone it\'s
still not a hard question.

It is a little disappointing; how the original, simple MP3 players
disappeared from the local retail market.

I think it was the introduction of early small screens that killed
them. Fashion trends are a bitch.

RL

 

[a a]

On Sunday, 12 June 2022 at 18:01:21 UTC+2, legg wrote:

On Sat, 11 Jun 2022 20:31:06 -0600, rbowman <bow...@montana.com
wrote:
On 06/11/2022 04:21 PM, a a wrote:
On Saturday, 11 June 2022 at 23:43:26 UTC+2, Don wrote:
a a <mant...@gmail.com> wrote:
On Saturday, 11 June 2022 at 23:04:48 UTC+2, Don wrote:
Many consumer grade USB power banks come with a built-in
automatic shutdown circuit. Light loads, such as the nominal
6.8 ?A drawn by a portable MP3 player, are not enough to
prevent shutdown. To compensate, this project uses
a 555 to nominally pull 100 mA every 5.5 seconds.

( excerpt - read more at https://crcomp.net/mp3mod/index.php )
smart powerbanks come 2 usb sockets, so you just connect your MP3 player
to one usb socket and LED light to 2nd usb socket to keep it on.

Smart MP3 platers come with internal battery, you can charge from power bank
Your blatantly obvious approach was the first solution attempted by me.
It was eventually, reluctantly, rejected because it doesn\'t work out so
well in practice. Read the link to find out why.
Danke,

--
Don, KB7RPU, https://www.qsl.net/kb7rpu
There was a young lady named Bright Whose speed was far faster than light;
She set out one day In a relative way And returned on the previous night.
MP3 player is an ancienct product, no more offered on a market.
Most guys prefer smartphone to get and play back music.


I was surprised a couple of years ago when I went to Best Buy to get an
MP3 player and they only had one, one piece that is, not one model.

The question remains which would I rather take to the gym and possibly
destroy, a $30 SanDisk Jam or a smart phone. Which is more convenient to
clip to my t-shirt? Even though I don\'t have a $1000 smart phone it\'s
still not a hard question.
It is a little disappointing; how the original, simple MP3 players
disappeared from the local retail market.

I think it was the introduction of early small screens that killed
them. Fashion trends are a bitch.

RL
MP3 player is off-line device, so no more hot since you need to get one connected to smaretphone or PC to get music files copied.

MP3 is dead horse today , worth nothing

You risk nothing if you wear bluetooth earphones at the gym.

Destroy available MP3 devices and forget the problem

 

[John Doe]

a a <manta103g@gmail.com> wrote:

legg wrote:
rbowman wrote:
a a wrote:
Don wrote:
a awrote:
Don wrote:

Many consumer grade USB power banks come with a built-in
automatic shutdown circuit. Light loads, such as the nominal
6.8 ?A drawn by a portable MP3 player, are not enough to
prevent shutdown. To compensate, this project uses a 555 to
nominally pull 100 mA every 5.5 seconds.

( excerpt - read more at https://crcomp.net/mp3mod/index.php )

smart powerbanks come 2 usb sockets, so you just connect your MP3
player to one usb socket and LED light to 2nd usb socket to keep
it on.

Smart MP3 platers come with internal battery, you can charge from
power bank

Your blatantly obvious approach was the first solution attempted by
me. It was eventually, reluctantly, rejected because it doesn\'t
work out so well in practice. Read the link to find out why.
Danke,

-- Don, KB7RPU, https://www.qsl.net/kb7rpu There was a young lady
named Bright Whose speed was far faster than light; She set out one
day In a relative way And returned on the previous night.

MP3 player is an ancienct product, no more offered on a market.
Most guys prefer smartphone to get and play back music.

I was surprised a couple of years ago when I went to Best Buy to get
an MP3 player and they only had one, one piece that is, not one model.

The question remains which would I rather take to the gym and possibly
destroy, a $30 SanDisk Jam or a smart phone. Which is more convenient
to clip to my t-shirt? Even though I don\'t have a $1000 smart phone
it\'s still not a hard question.

It is a little disappointing; how the original, simple MP3 players
disappeared from the local retail market.

I think it was the introduction of early small screens that killed
them. Fashion trends are a bitch.

MP3 player is off-line device, so no more hot since you need to get one
connected to smaretphone or PC to get music files copied.

MP3 is dead horse today , worth nothing

You risk nothing if you wear bluetooth earphones at the gym.

Destroy available MP3 devices and forget the problem

Run that through Google Translate again, this time choose English as the
target language.

 

[Cydrome Leader]

Don <g@crcomp.net> wrote:

a a wrote:
Don wrote:
a a wrote:
Don wrote:
Many consumer grade USB power banks come with a built-in
automatic shutdown circuit. Light loads, such as the nominal
6.8 ??A drawn by a portable MP3 player, are not enough to
prevent shutdown. To compensate, this project uses
a 555 to nominally pull 100 mA every 5.5 seconds.

( excerpt - read more at https://crcomp.net/mp3mod/index.php )
smart powerbanks come 2 usb sockets, so you just connect your MP3 player
to one usb socket and LED light to 2nd usb socket to keep it on.

Smart MP3 platers come with internal battery, you can charge from power bank
Your blatantly obvious approach was the first solution attempted by me.
It was eventually, reluctantly, rejected because it doesn\'t work out so
well in practice. Read the link to find out why.

MP3 player is an ancient product, no more offered on a market.
Most guys prefer smartphone to get and play back music.

It sounds about right - you\'re probably correct in regards to what most
people do. They use their phone to download MP3s from the Inet.
OTOH, my phone is used strictly for phone calls, SMS, and
photographs. By choice, it never connects to the Inet.
A plain MP3 player appeals to me in the same manner as a unix
command - it does only one job and it does it well. In this case, it
plays MP3s pre-loaded onto an SD card. And it actually is still sold on
ebay. There\'s a link to a retailer on my page.

Check out this dusty fool foaming over some trash mp3 player that requires
an external battery pack plus some 555 hack nonsense to even stay powered
on.

Rediculous.

 

[Jan Panteltje]

On a sunny day (Sun, 12 Jun 2022 09:14:24 -0700 (PDT)) it happened a a
<manta103g@gmail.com> wrote in
<5f238ad3-dc3e-4fe5-830c-898dfed23cfen@googlegroups.com>:

MP3 player is off-line device, so no more hot since you need to get one connected to smaretphone or PC to get music files
copied.

MP3 is dead horse today , worth nothing

Bull, I have many mp3 capable things, credit card size mp3 / video player, what not, phone
But my mp3 player is a 20 year old or so Creative Muvo, runs on an AAA Eneloop battery all day if needed,
easy to charge or swap, I concatenated all my favorite music into one long mp3 so it
can run unattended for many hours, and is small and simple to use.



>You risk nothing if you wear bluetooth earphones at the gym.

I prefer no RF shit next to my head, you see what it can do to people ;-)


>Destroy available MP3 devices and forget the problem

Silly