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1234 2025-05-14 23:52:59 lvd /kicad/rev_d/ pentevo: rev D: mfb_lowpass.py: add as comments some formulas suitable for component values calculation  
1233 2025-05-14 08:52:40 lvd /kicad/rev_d/ pentevo: rev D: mfb_lowpass.py: more bounding for values to get single and pretty solution for transfer function  
1232 2025-05-13 10:50:47 lvd /kicad/rev_d/ pentevo: rev D: mfb_lowpass.py: add pretty printing  
1231 2025-05-13 10:44:13 lvd /kicad/rev_d/ pentevo: rev D: add transfer func calculation in terms of gain, cutoff freq and quality  
1230 2025-05-13 10:05:17 lvd /kicad/rev_d/ pentevo: rev D: fix tl res calc (typo in naming); add audio reqs/thoughts file; start python prog to calc mfb lowpass filters and select values for it  
1229 2025-05-04 22:00:28 lvd /kicad/rev_d/ pentevo: rev D: add some audio notes  
1228 2025-05-03 17:04:52 lvd /kicad/rev_d/ pentevo: rev D: add pca9555 to control extra address pins of ROM  
1227 2025-05-03 16:03:55 lvd /kicad/rev_d/ pentevo: rev D: replace tlc072 with tlv9162; replace m29f040b to m29f032d; TODO: add pca9555 to control high address pins of flash ic  
1223 2025-04-13 18:28:51 lvd / pentevo: add datasheets for SS14 and S1A diodes; rev. D: replace linear regulator diodes with S1A  
1222 2025-04-13 14:03:50 lvd /kicad/rev_d/ pentevo: rev D: start redoing audio part (WIP)  
1221 2025-04-12 23:03:56 lvd /kicad/rev_d/ pentevo: rev D: redoing audio (WIP), add reverse diodes to linear regulators  
1220 2025-04-08 09:40:34 lvd /kicad/rev_d/ pentevo: rev D: redoing audio (WIP)  
1219 2025-04-07 23:21:25 lvd /kicad/rev_d/ pentevo: rev D: start redoing audio part (WIP)  
1217 2025-04-07 22:20:27 lvd /kicad/rev_d/sim/ pentevo: rev D: add sim circuit for distributed highpass filter  
1216 2025-04-06 19:48:21 lvd /kicad/rev_d/sim/ pentevo: rev D: update sim circuit for tpa6120 inv buffer: use microcap12, use TLC071 and THS6012 models  
1215 2025-03-26 22:23:46 lvd /kicad/rev_d/ pentevo: rev D: change uSD card LDO to tpa7a2033, which is drop-in replacement for lp2985 with increased max current  
1214 2025-03-26 22:22:31 lvd /kicad/rev_d/sim/ pentevo: rev D: update filter sim circuit with pure current sink (as it is for the majority of opamps and headset amps)  
1213 2025-03-26 10:05:46 lvd /kicad/rev_d/ pentevo: rev D: fix uSD card capacitors, replace 2 series resistors with single one, make BAT54c for AVR 'do not populate' instead of SS14, replace 10uF for AVR from tantalum to X7R  
1211 2025-03-24 22:36:04 lvd /kicad/rev_d/ pentevo: rev D: remove AGND, use GND instead  
1210 2025-03-24 20:03:40 lvd /kicad/rev_d/ pentevo: rev D: update footprints for 470uF and 470uH, remove 0R5 resistors  

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