#avr Logs

Jan 12 2021

01:06 AM rue_bed2: anyone writing digital filters?
08:29 AM rue_mohr: me!
08:29 AM rue_mohr: oh wait, nevermind...
08:43 AM vmt: --
10:06 AM twnqx: mh
10:06 AM twnqx: i waould like to build a -12V to -5V switching regulator
10:07 AM twnqx: apparently noone does that...
10:10 AM cehteh: there are symetric rail regulators
10:11 AM cehteh: and inverting ones
10:35 AM twnqx: yeah, guess i'll use an inverting design from the +12V rail
10:37 AM twnqx: or a good old 7905 :P
10:45 AM cehteh: that wont give you -12V
10:45 AM cehteh: or -5V
10:52 AM twnqx: i have -12
10:52 AM twnqx: and from there it would give me -5.
11:02 AM cehteh: how much current?
11:02 AM cehteh: i mean for low current 7905 is an option
11:02 AM cehteh: or even a bette, more modern vreg
11:16 AM twnqx: 1A is the goal
11:20 AM cehteh: 7905 will get pretty hot with 12v
11:20 AM twnqx: sure