#avr Logs

May 06 2020

12:50 AM _ami_: http://tinyurl.com/y8flyaoh --> This could power up op-amps.
12:56 AM _ami_: Simple Dual power supply from a noisy single power supply for powering op-amps
12:56 AM _ami_: It should work. http://tinyurl.com/y8flyaoh
02:10 AM rue_mohr: why not just use a linear reg, 78Lxx
02:29 AM polprog: rue_mohr: why not just use an off the shelf motor driver :v
02:30 AM polprog: Its more fun this way
03:11 AM rue_bed: off the shelf drivers lose 1.8V+
03:12 AM rue_bed: at 2A
03:12 AM rue_bed: I cant accept it
03:12 AM rue_bed: with 100mR fets (garbage, really) I can do better
03:13 AM rue_bed: the trick is driving an all-N-channel H bridge
03:13 AM rue_bed: I can pull a trick if I have a 24V src, and my supply/load is always 12
03:13 AM rue_bed: so then the trick becomes a 24V source
03:13 AM rue_bed: which can be a flyback or forward supply
03:14 AM rue_bed: the flyback supply needs to be regulated
03:14 AM rue_bed: so its less parts to do a forward supply
03:14 AM rue_bed: then the trick becomes an oscillator
03:15 AM rue_bed: if I'm using a push-pull converter, (my fav) then I need to make sure the duty IS 50%
03:15 AM rue_bed: hmm
03:16 AM _ami_: rue_bed, i am inspired by you. :) that is why do things in a different way! ;)
03:16 AM rue_bed: I wonder
03:16 AM _ami_: rue_bed, btw, linear regulator won't solve the ripple issue, i am having.
03:16 AM rue_bed: I wonder if I do a forward converter thats not push-pull
03:16 AM rue_bed: _ami_, ok,
03:17 AM rue_bed: hmmm
03:19 AM cehteh: rue_bed: you can do the bootstrap trick or just add a charge pump for the high side fets
03:20 AM cehteh: in rc-model ESC's all nfet is state of the art
06:40 AM polprog: rue_bed: im kidding.. your DCDCs are impressive
06:40 AM polprog: i should try to build some
08:52 AM rue_mohr: cehteh, the bootstrap wont handle 100% duty, which I do lots
08:53 AM rue_mohr: the charge pump thing sucks for output unless you have really fancy efficient high side drivers, and I dont
10:17 AM cehteh: rue_bed: iirc there are some driver IC's with integrated charge-pump, that should suck less
02:14 PM matrixstorm: hi
02:15 PM cehteh: o/
03:01 PM RikusW: Seems like lockdown got a few people back in this channel ;)
03:02 PM cehteh: did it?
03:03 PM RikusW: I see a few familiar nicks :) like Steffanx and megal0maniac
03:03 PM Steffanx: Just you. RikusW
03:03 PM Steffanx: Gooday sir. Hows the far south?
03:05 PM RikusW: Gooday, lockdown has been relaxed a bit, can exercise at least, but I really want to get back on Table Mountain
03:07 PM RikusW: How is things going over there ?
04:10 PM LeoNerd: Hey RikusW.. Been a while :)
04:17 PM matrixuser: hi
04:18 PM cehteh: matrixuser: do you know another word than 'hi' ?
04:18 PM matrixuser: yes I do
04:19 PM cehteh: :D
04:19 PM matrixuser: but I use the hi to check if NickServ grants me writerights again
04:19 PM matrixuser: ;-)
04:20 PM RikusW: Hi LeoNerd
06:57 PM Santh_ is now known as Santh
10:53 PM [1]MrMobius is now known as MrMobius
11:26 PM jlstrauss: Hi folks, I have an ATMega328 hooked up to an Atmel ICE. I can communicate with it fine until I enable debugWire and then I get the dreaded 'Got 0xc0, expected 0x00'. I've checked and checked the pinouts, voltage levels, etc and I'm stumped!
11:26 PM jlstrauss: Google has many solutions, none of which are solving the problem
11:30 PM day_ is now known as day