| 6 Nov 2023 |
 PurpleLady | Then you'd have a random unsigned or signed integer based on however you interpret the result. | 08:41:14 |
|  @falk:zeh.eu.com left the room. | 08:42:32 |
| PurpleLady | Of course, instead of and LFSR, one could use a ROM and a counter. Put an even, scrambled table in the ROM with balanced periods. That would not be truly random, but it would be no worse than LFSR. That is just combinational logic generating the same table each time. So the counter chips drive the address lines and point to a different "random" number. Now, what if you want to use a seed? Just add a number to it for the entire period. thus the spacings are the same, but using different number.
Now, to make that seem more random, have a way to back up the state of your counters between powerings. So if you use NVRAM, the last address counter value and the addition offset can be backed up and restored for the next boot. So the user's behavior can add to the randomness. | 08:49:34 |
| PurpleLady | I'm sorry if I ran someone off. That was not my intent. | 08:49:51 |
| PurpleLady | * Of course, instead of an LFSR, one could use a ROM and a counter. Put an even, scrambled table in the ROM with balanced periods. That would not be truly random, but it would be no worse than LFSR. That's just combinational logic generating the same table each time. So the counter chips drive the address lines and point to a different "random" number. Now, what if you want to use a seed? Just add a number to it for the entire period. thus the spacings are the same, but using different numbers.
To make that seem more random, have a way to back up the state of your counters between powerings. So if you use NVRAM, the last address counter value and the addition offset can be backed up and restored for the next boot. So the user's behavior can add to the randomness. | 22:16:03 |
| 10 Nov 2023 |
| PurpleLady |
What would be good to cover? I think it may be time to consolidate.
| 10:00:53 |
| PurpleLady | There are various electronics rooms and several are just the admin and maybe just me. | 16:52:03 |
| 11 Nov 2023 |
 protocall7 | I've noticed the same, ##analog is also dead. I don't think you did anything to run anyone off btw. TRNG idea sounds cool, but it's a bit over my head so I don't have any feedback haha.
Consolidation might not be a horrible idea. I certainly miss the amount of people and interaction in #sparkfun and ##electronics on freenode IRC years ago | 17:45:29 |
| PurpleLady | And this room has no mods/admins. | 19:11:25 |
| 14 Nov 2023 |
|  KhazAkar joined the room. | 06:05:42 |
|  @vancha112:matrix.org changed their profile picture. | 21:00:19 |
| 17 Nov 2023 |
|  @ilya-epifanov:matrix.org left the room. | 23:12:36 |
| 20 Nov 2023 |
|  chargeitall joined the room. | 17:01:53 |
| chargeitall | Can semiconductors from household appliances such as breast pumps, fridges, and washing machines be used for military purposes? Is this claim far-fetched? | 17:14:29 |
| PurpleLady | I don't think most breast pumps would have semiconductors. I don't know too many refrigerators that would need semiconductors either. As for washing machines, maybe. | 17:22:30 |
| protocall7 | Guess it would depend on the semiconductor and the military purpose. Something generic like a logic gate could show up in just about anything. A microcontroller could be programmed to do anything as well. As far as whether or not consumer appliances would use "military spec" parts as far as temperature range, shock and vibration, etc... not sure, maybe? | 17:46:12 |
| chargeitall | I was referring to removing chips from household devices, reprogramming them with new software, and using them for military purposes such as avionics, GPS, etc. | 20:12:53 |
| 21 Nov 2023 |
| PurpleLady | Unless the items have like FPGAs in them, the "reprogramming" part doesn't sound likely. | 00:12:21 |
| 26 Nov 2023 |
 berlinuxer | military specs expexts more robustness, of course. e.g. the temperature-range is wider than for industrial- or consumer-usage. i really doubt, that you will find a IC with mil-spec in household-devices | 13:51:00 |
| 1 Dec 2023 |
|  waitforthe joined the room. | 18:36:39 |
| waitforthe | 
Download circuitmotor.jpg | 20:44:39 |
| waitforthe | hi i got a question. here is a picture of my circuit, why is the motor still spining despite not triggered by the pir sensor output (3.3v). transistor is 2n2222. 3v motor 1.5A max draw. 12v power supply. | 20:44:42 |
| waitforthe | the pir sensor actually ampliflies the rpms of the motor but the motor still contains a baseline rpm. i thought it should be zero power unless triggered by the transistor | 20:47:01 |
| waitforthe | if i remove the motor, it works fine with the led albeit larger resistor | 20:47:42 |
| 3 Dec 2023 |
|  @beect:matrix.org joined the room. | 03:35:26 |
| 6 Dec 2023 |
|  psydroid changed their display name from psydroid to Tyrannosaurus Rex. | 17:21:47 |
| psydroid changed their display name from Tyrannosaurus Rex to psydroid. | 17:42:38 |
| 8 Dec 2023 |
|  @archer72:matrix.org joined the room. | 16:09:51 |
| 12 Dec 2023 |
|  Dr. Dude joined the room. | 10:46:57 |
| 27 Dec 2023 |
|  @mriconoclast:matrix.org changed their profile picture. | 11:09:53 |
