I need an MP3 player that runs 24/7. All the ones I have shut down and switch to file transfer mode when you plug in USB. So, I think I need a 1.5V AAA battery eliminator. All my wall warts use a TL431 as regulator. If I could find a replacement with 1.2V-ish reference in TO-92 I could just drop it in and change one resistor to get 1.5V. What's a good cheap, shunt-regulator IC that will go down to 1.5V? TL431 is 5 for a buck shipped on ebay. Closest thing I can find in 1.2V are SMT devices at $10 each shipped. Anything cheap available? Suppose I could use a Darlington transistor and not sweat the tempco. Designing a supply from scratch is trivial. Problem is packaging it. I'm not that motivated. Ideas? Thanks, mike
TL431 replacement with 1.2V reference???
Started by ●January 17, 2015
Reply by ●January 17, 20152015-01-17
On Sat, 17 Jan 2015 04:18:49 -0800, mike wrote:> I need an MP3 player that runs 24/7. > All the ones I have shut down and switch to file transfer mode when you > plug in USB.VLC media player play videos, but it also plays music and FLAC, which is miles better than MP3. Another choice would be to run Linux, and not be hog tied by the stupidity Windows places on a user.
Reply by ●January 17, 20152015-01-17
On Saturday, 17 January 2015 12:19:34 UTC, mike wrote:> All my wall warts use a TL431 as regulator. > > If I could find a replacement with 1.2V-ish reference in TO-92 > I could just drop it in and change one resistor to get 1.5V. > > What's a good cheap, shunt-regulator IC that will go down to 1.5V? > > TL431 is 5 for a buck shipped on ebay. > Closest thing I can find in 1.2V are SMT devices at $10 each shipped. > > Anything cheap available?Why not use a TLV431 which is available in TO-92 from several manufacturers? John
Reply by ●January 17, 20152015-01-17
On a sunny day (Sat, 17 Jan 2015 04:18:49 -0800) it happened mike <ham789@netzero.net> wrote in <m9djvk$33m$1@dont-email.me>:>I need an MP3 player that runs 24/7. >All the ones I have shut down and switch to file transfer mode >when you plug in USB. >So, I think I need a 1.5V AAA battery eliminator. > >All my wall warts use a TL431 as regulator. > >If I could find a replacement with 1.2V-ish reference in TO-92 >I could just drop it in and change one resistor to get 1.5V.Series regulator, LM317 will go down to 1.2 V and up to > 30V I am using one for just that purpose with my Creative USB mp3 player.
Reply by ●January 17, 20152015-01-17
On a sunny day (Sat, 17 Jan 2015 04:18:49 -0800) it happened mike <ham789@netzero.net> wrote in <m9djvk$33m$1@dont-email.me>:>I need an MP3 player that runs 24/7. >All the ones I have shut down and switch to file transfer mode >when you plug in USB. >So, I think I need a 1.5V AAA battery eliminator. > >All my wall warts use a TL431 as regulator. > >If I could find a replacement with 1.2V-ish reference in TO-92 >I could just drop it in and change one resistor to get 1.5V.Series regulator, LM317 will go down to 1.2 V and up to > 30V I am using one for just that purpose with my Creative USB mp3 player. BTW I use 5V, it depends how you connect the 2 USB data lines if it goes into 'PC' or normal mode. Corection: the MUvo uses this: http://panteltje.com/pub/Muvo_USB_power_supply_IMG_4701.JPG Sorry I do not 'design' thse things, with slimulator etc, just what I grab from the junk box when I needed to hear music, Been working 24/7 since 2010 it seems. LOL HAHAHAHA
Reply by ●January 17, 20152015-01-17
On Saturday, January 17, 2015 at 8:19:13 AM UTC-5, DecadentLinuxUserNumeroUno wrote:> On Sat, 17 Jan 2015 04:18:49 -0800, mike wrote: > > > I need an MP3 player that runs 24/7. > > All the ones I have shut down and switch to file transfer mode when you > > plug in USB. > > VLC media player play videos, but it also plays music and FLAC, which is > miles better than MP3. > > Another choice would be to run Linux, and not be hog tied by the > stupidity Windows places on a user.Another mindless idiotic response...
Reply by ●January 17, 20152015-01-17
On Sat, 17 Jan 2015 08:17:49 -0800, bloggs.fredbloggs.fred wrote:> On Saturday, January 17, 2015 at 8:19:13 AM UTC-5, > DecadentLinuxUserNumeroUno wrote: >> On Sat, 17 Jan 2015 04:18:49 -0800, mike wrote: >> >> > I need an MP3 player that runs 24/7. >> > All the ones I have shut down and switch to file transfer mode when >> > you plug in USB. >> >> VLC media player play videos, but it also plays music and FLAC, which >> is miles better than MP3. >> >> Another choice would be to run Linux, and not be hog tied by the >> stupidity Windows places on a user. > > Another mindless idiotic response...Ahh... so the BLOGGS utter RETARD has no clue about how WindBLOWS handles USB insertion events. Why am I not surprised that his idiocy level just went up... again.
Reply by ●January 17, 20152015-01-17
On Sat, 17 Jan 2015 04:18:49 -0800, mike <ham789@netzero.net> wrote:>I need an MP3 player that runs 24/7. >All the ones I have shut down and switch to file transfer mode >when you plug in USB. >So, I think I need a 1.5V AAA battery eliminator. > >All my wall warts use a TL431 as regulator. > >If I could find a replacement with 1.2V-ish reference in TO-92 >I could just drop it in and change one resistor to get 1.5V. > >What's a good cheap, shunt-regulator IC that will go down to 1.5V? > >TL431 is 5 for a buck shipped on ebay. >Closest thing I can find in 1.2V are SMT devices at $10 each shipped. > >Anything cheap available? > >Suppose I could use a Darlington transistor and not sweat the tempco. > >Designing a supply from scratch is trivial. Problem is packaging it. >I'm not that motivated. > >Ideas? >Thanks, mike<http://electronicdesign.com/power/shunt-regulator-boasts-124v-reference-voltage> <http://www.ti.com/product/tlv431> ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | San Tan Valley, AZ 85142 Skype: skypeanalog | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food.
Reply by ●January 17, 20152015-01-17
On Saturday, January 17, 2015 at 11:52:11 AM UTC-5, DecadentLinuxUserNumeroUno wrote:> On Sat, 17 Jan 2015 08:17:49 -0800, bloggs.fredbloggs.fred wrote: > > > On Saturday, January 17, 2015 at 8:19:13 AM UTC-5, > > DecadentLinuxUserNumeroUno wrote: > >> On Sat, 17 Jan 2015 04:18:49 -0800, mike wrote: > >> > >> > I need an MP3 player that runs 24/7. > >> > All the ones I have shut down and switch to file transfer mode when > >> > you plug in USB. > >> > >> VLC media player play videos, but it also plays music and FLAC, which > >> is miles better than MP3. > >> > >> Another choice would be to run Linux, and not be hog tied by the > >> stupidity Windows places on a user. > > > > Another mindless idiotic response... > > Ahh... so the BLOGGS utter RETARD has no clue about how WindBLOWS > handles USB insertion events. > > Why am I not surprised that his idiocy level just went up... again.I wouldn't pay two cents for what you think you know...lunatic.
Reply by ●January 17, 20152015-01-17
mike wrote:> I need an MP3 player that runs 24/7. > All the ones I have shut down and switch to file transfer mode > when you plug in USB. > So, I think I need a 1.5V AAA battery eliminator. > > All my wall warts use a TL431 as regulator. > ------------------------^^^^I have NEVER seen a "standard" wallwart that was regulated. Only special wall warts are regulated, and a number of those use 7805 type regulators (and many of thse are heat-sinked).
