#garfield Logs

Nov 29 2020

12:11 AM rue_shop1: hahah I forgot about the /2 effect
01:04 AM rue_shop1: and apparently I cant drive it direct with the 555,
01:05 AM rue_shop1: so I need a driver, and that drops 2.2V
03:15 AM rue_mohr: forward converter?
03:54 AM rue_mohr: 5us
03:54 AM rue_mohr: if I want an inductor to ramp up to...
03:54 AM rue_mohr: 10mA
03:54 AM rue_mohr: from 0
03:57 AM rue_mohr: polprog,
03:57 AM rue_mohr: I = vt/L right?
03:57 AM rue_mohr: I = v*t/L right?
03:57 AM rue_mohr: I = (v*t)/L right?
03:59 AM rue_mohr: 2.5mH, how do I always end up with such large inductors?
04:07 AM polprog: inductors are evil
04:07 AM polprog: jesus fuck i cant install 98 on yet another pc
04:07 AM polprog: how am i going to get the hc12 tools to work
04:07 AM polprog: i need a PC with windows and a parport
04:07 AM polprog: how hard can it be
04:08 AM rue_mohr: the HC12 tools should run under dos
04:08 AM rue_mohr: what are you trying to use?
04:08 AM rue_mohr: why a parport?
04:09 AM rue_mohr: pretty sure gcc supports the hc12
04:09 AM rue_mohr: its in all the header files
04:10 AM rue_mohr: their existence is so fleeting
04:10 AM rue_mohr: your telling me
04:10 AM rue_mohr: we gonna build that forward converter?
04:10 AM rue_mohr: dunno, it is 2am
04:10 AM rue_mohr: sleep could be a thing
04:17 AM rue_mohr: so? lie in bed and not sleep, or , build linked inductor?
04:25 AM polprog: because the programmer andrew sent me is a parport dongle
04:25 AM polprog: i know there are free compiler but i dont know if there is linux software for the dongle
04:26 AM polprog: get a good sleep
04:26 AM polprog: i didnt recently, everything sucks
04:37 AM rue_shop2: but you just serial upload via buffalo
04:38 AM rue_shop2: is the hc12 you have not eeprom?
04:45 AM polprog: via what?
04:45 AM polprog: ive got a BDM Multilink programmer and a DEV9S12D/A devboard by pemicro
04:47 AM rue_shop2: sreial port
04:52 AM polprog: no, parport
04:52 AM polprog: well, db25
04:53 AM rue_shop2: does the hc12 you have, have buffalo on it?
05:58 AM rue_bed: ok, the forward converter idea worked
05:59 AM rue_bed: in just 8 components I have the -3, +8V supplies I need to run the NE5532s and get 0-5V
05:59 AM rue_bed: but I'll need to source my sampling clock somewhere else
05:59 AM rue_bed: its running out of range
06:00 AM rue_bed: so I need two op-amp chips
06:00 AM rue_bed: one of them is the triangle oscillator for the lvdt primary
06:01 AM rue_bed: the other is half used for the lvdt secondary amp and the sample and hold output buffer
06:01 AM rue_bed: huh
01:04 PM rue_bed: well, I'm all excited that the forward converter worked
01:06 PM rue_bed: I just came up with an idea for an improvement too
01:06 PM rue_bed: so much for more sleep
04:09 PM rue_shop1: ok, some tree cutting out of the way
06:53 PM rue_mohr: polprog, hey
06:54 PM rue_mohr: you have a fancy math program dont ya?
08:40 PM rue_mohr: https://twitter.com/RueNahcMohr/status/1333239208010342400
08:41 PM rue_mohr: I'll try switching op-amps next and run it with that new supply.
09:16 PM rue_shop2: polprog, can you come up with a way of using a 4060 to output a pulse for 14/16 for 1/16th of that pulse time
09:18 PM rue_shop1: oh, it might be harder than that, I have to synchronize it