Been a long time since I last looked at a 555 datasheet but it seems they are more capable than I ever imagined. Now that many processors are on 52 week lead times we can squeeze more from of ol' faithfulls? <https://www.ti.com/lit/ds/symlink/se555m.pdf> 2 Applications • Fingerprint Biometrics • Iris Biometrics • RFID Reader Do not scrimp by using the vanilla LM555 which lacks the magic functionality :) <https://www.ti.com/lit/ds/symlink/lm555.pdf> piglet
555 timer for iris scan biometrics?
Started by ●August 31, 2022
Reply by ●August 31, 20222022-08-31
piglet wrote:> > Been a long time since I last looked at a 555 datasheet but it seems > they are more capable than I ever imagined. Now that many processors are > on 52 week lead times we can squeeze more from of ol' faithfulls? > > <https://www.ti.com/lit/ds/symlink/se555m.pdf> > > 2 Applications > • Fingerprint Biometrics > • Iris Biometrics > • RFID Reader > > Do not scrimp by using the vanilla LM555 which lacks the magic > functionality :) > > <https://www.ti.com/lit/ds/symlink/lm555.pdf>Although it's not a biometric device, earlier this year, a 555 power bank keepalive was designed and built by me: <https://crcomp.net/mp3mod/index.php> The gadget is used every single day and it works perfectly. The power bank lasts about a month between charges. The gadget's used exclusively to listen to audio books on dog walks and spins: <https://crcomp.net/arts/spintale/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.
Reply by ●September 1, 20222022-09-01
On a sunny day (Wed, 31 Aug 2022 21:26:12 +0100) it happened piglet <erichpwagner@hotmail.com> wrote in <teog55$1t9ok$1@dont-email.me>:> >Been a long time since I last looked at a 555 datasheet but it seems >they are more capable than I ever imagined. Now that many processors are >on 52 week lead times we can squeeze more from of ol' faithfulls? > ><https://www.ti.com/lit/ds/symlink/se555m.pdf> > >2 Applications >• Fingerprint Biometrics >• Iris Biometrics >• RFID Reader > >Do not scrimp by using the vanilla LM555 which lacks the magic >functionality :) > ><https://www.ti.com/lit/ds/symlink/lm555.pdf> > > >pigletSure, I designed an ultrasonic distance meter with one in the eighties to measure water height in wells. 555 and some CMOS counters.
Reply by ●September 1, 20222022-09-01
On 01/09/2022 6:39 am, Jan Panteltje wrote:> On a sunny day (Wed, 31 Aug 2022 21:26:12 +0100) it happened piglet > <erichpwagner@hotmail.com> wrote in <teog55$1t9ok$1@dont-email.me>: > >> >> Been a long time since I last looked at a 555 datasheet but it seems >> they are more capable than I ever imagined. Now that many processors are >> on 52 week lead times we can squeeze more from of ol' faithfulls? >> >> <https://www.ti.com/lit/ds/symlink/se555m.pdf> >> >> 2 Applications >> • Fingerprint Biometrics >> • Iris Biometrics >> • RFID Reader >> >> Do not scrimp by using the vanilla LM555 which lacks the magic >> functionality :) >> >> <https://www.ti.com/lit/ds/symlink/lm555.pdf> >> >> >> piglet > > Sure, I designed an ultrasonic distance meter with one in the eighties > to measure water height in wells. > 555 and some CMOS counters.Yes, wonderfully versatile chip can do all sorts of weird and wonderful things. So how many would you need for TI's April 1st application suggestion of iris biometrics? piglet
Reply by ●September 1, 20222022-09-01
On a sunny day (Thu, 1 Sep 2022 10:18:26 +0100) it happened piglet <erichpwagner@hotmail.com> wrote in <teptd3$24qbf$1@dont-email.me>:>On 01/09/2022 6:39 am, Jan Panteltje wrote: >> On a sunny day (Wed, 31 Aug 2022 21:26:12 +0100) it happened piglet >> <erichpwagner@hotmail.com> wrote in <teog55$1t9ok$1@dont-email.me>: >> >>> >>> Been a long time since I last looked at a 555 datasheet but it seems >>> they are more capable than I ever imagined. Now that many processors are >>> on 52 week lead times we can squeeze more from of ol' faithfulls? >>> >>> <https://www.ti.com/lit/ds/symlink/se555m.pdf> >>> >>> 2 Applications >>> • Fingerprint Biometrics >>> • Iris Biometrics >>> • RFID Reader >>> >>> Do not scrimp by using the vanilla LM555 which lacks the magic >>> functionality :) >>> >>> <https://www.ti.com/lit/ds/symlink/lm555.pdf> >>> >>> >>> piglet >> >> Sure, I designed an ultrasonic distance meter with one in the eighties >> to measure water height in wells. >> 555 and some CMOS counters. > >Yes, wonderfully versatile chip can do all sorts of weird and wonderful >things. > >So how many would you need for TI's April 1st application suggestion of >iris biometrics?Well depends how many 555's you'd have to sell to get enough money for an iris biometric module? Think out of the box :-)
Reply by ●September 1, 20222022-09-01
On 01/09/2022 10:30 am, Jan Panteltje wrote:> On a sunny day (Thu, 1 Sep 2022 10:18:26 +0100) it happened piglet > <erichpwagner@hotmail.com> wrote in <teptd3$24qbf$1@dont-email.me>: > >> On 01/09/2022 6:39 am, Jan Panteltje wrote: >>> On a sunny day (Wed, 31 Aug 2022 21:26:12 +0100) it happened piglet >>> <erichpwagner@hotmail.com> wrote in <teog55$1t9ok$1@dont-email.me>: >>> >>>> >>>> Been a long time since I last looked at a 555 datasheet but it seems >>>> they are more capable than I ever imagined. Now that many processors are >>>> on 52 week lead times we can squeeze more from of ol' faithfulls? >>>> >>>> <https://www.ti.com/lit/ds/symlink/se555m.pdf> >>>> >>>> 2 Applications >>>> • Fingerprint Biometrics >>>> • Iris Biometrics >>>> • RFID Reader >>>> >>>> Do not scrimp by using the vanilla LM555 which lacks the magic >>>> functionality :) >>>> >>>> <https://www.ti.com/lit/ds/symlink/lm555.pdf> >>>> >>>> >>>> piglet >>> >>> Sure, I designed an ultrasonic distance meter with one in the eighties >>> to measure water height in wells. >>> 555 and some CMOS counters. >> >> Yes, wonderfully versatile chip can do all sorts of weird and wonderful >> things. >> >> So how many would you need for TI's April 1st application suggestion of >> iris biometrics? > > Well depends how many 555's you'd have to sell to get enough money for an iris biometric module? > Think out of the box :-)haha! Brilliant. piglet
