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Most Greedy Boy, of them all... or (there is no) DEFiSIT of Papa's Koans
Most Greedy Boy, of them all... or (there is no) DEFiSIT of Papa's Koans
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Old 13th January 2018, 05:51 PM   #231
indra1 is offline indra1  Indonesia
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Originally Posted by Zen Mod View Post
... will battle with SOIC8
Surprise !!! No battle with this Arduino current sensor module. Sensitivity is only 185mV/A though.
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File Type: pdf ACS712-Datasheet.pdf (677.7 KB, 46 views)
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Old 13th January 2018, 06:40 PM   #232
Zen Mod is offline Zen Mod  Serbia
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Most Greedy Boy, of them all... or (there is no) DEFiSIT of Papa's Koans
OK - goooooooooood for experiments

but , for my use , will make my pcb arrangement , integrated on amp pcb
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Old 13th January 2018, 07:25 PM   #233
indra1 is offline indra1  Indonesia
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Bien sūr, mon ami. Exact same thinking.
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Old 13th January 2018, 08:17 PM   #234
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Most Greedy Boy, of them all... or (there is no) DEFiSIT of Papa's Koans
and just found that I have complete footprint/package in Eagle for ACS712

identical pinout and case



drawn dimension just for comparison
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File Type: jpg I'm not so easy to impress!!.jpg (25.8 KB, 399 views)
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Old 13th January 2018, 09:20 PM   #235
indra1 is offline indra1  Indonesia
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Old 14th January 2018, 04:35 PM   #236
generg is offline generg  Germany
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Most Greedy Boy, of them all... or (there is no) DEFiSIT of Papa's Koans
I just repaired my SIT 5 with OC71 Germanium transistors....

It sounds lovely!

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File Type: jpg 100_0034.jpg (757.5 KB, 375 views)
File Type: jpg 100_0035.jpg (711.0 KB, 368 views)
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and the First Wtt is......a really First Class PSS Idea
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Old 14th January 2018, 05:47 PM   #237
Zen Mod is offline Zen Mod  Serbia
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Most Greedy Boy, of them all... or (there is no) DEFiSIT of Papa's Koans
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Old 15th January 2018, 03:59 PM   #238
indra1 is offline indra1  Indonesia
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Default Low voltage hybrid power gyrator assisted SE amplifier

Papa's opto bias is really crazy amazing. I'd like to share a sim of a CFP MOS output stage with an alternative no source degeneration scheme with DF ~140. When higher DF is desired, an Opto & Hall chip combo can be chosen instead.

However, it is not easy to see the merit of the circuit in LTspice. 4H and above distortion figures reported in log file are useless being buried under simulation noise floor.
The trick is to choose Hann or Blackman "windowing function" on FFT view to clean up noise floor and give more meaningful figures. At 1W, the circuit exhibit monotonic distortion spectra with 3H and higher distortion figures rivaling those of the very best conventional DHT SE tube amps, at least in simulation. The 2SK79 can be replaced by a 6DJ8 with appropriate adjustment of V9 if desired.
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File Type: gif 2SK79 CFP TMos M2 VST.gif (28.0 KB, 293 views)
File Type: gif 2SK79 CFP TMos M2 VST FFT.gif (15.7 KB, 283 views)
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File Type: zip 2SK79 CFP TMos M2 VST Sim Files.zip (8.4 KB, 10 views)
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Old 15th January 2018, 06:14 PM   #239
Zen Mod is offline Zen Mod  Serbia
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Most Greedy Boy, of them all... or (there is no) DEFiSIT of Papa's Koans
I'm tellin' ya all , all the time , that M2 is a Gem......

I made comparison sims of regular M2 and "M25" , and sent pics to Papa

I have an impression that he greened , having half glass of wine in hand , thinking ........ "who cares , I made it good enough "

having fun , while making it is , I believe , most important thing I learned from him

(most probably sole thing I was able to learn at all )
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Old 16th January 2018, 12:43 AM   #240
Zen Mod is offline Zen Mod  Serbia
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Most Greedy Boy, of them all... or (there is no) DEFiSIT of Papa's Koans
Default how to .... little pigs

I made my own layout solution , not that it demands too much of brain

(of course they (li'll pigs) need to be confirmed in prototype )
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File Type: jpg little-pigs-how-to.jpg (49.0 KB, 508 views)
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