Friday, February 16, 2018

prev. -- follow up

Stage.3 ::

no differential test yet . . . // now is ↓

 

[Eop]

Thursday, February 15, 2018

Yet a next attempt to make sense of the LM301

tThe experiment . . . adapted from :: National Semiconductor Corporation , SGS-THOMSON Microelectronics , Linear Technology Corporation , . . .


Still performing some 10x 5x worse than the d/s suggests . . .
-- but there is improvement since the prev. TEST

Related parts ::
  1. http://www.chipinfo.ru/dsheets/ic/153/ud2.html (LM101)
  2. http://www.chipinfo.ru/dsheets/ic/153/ud6.html (LM301A)
  3. http://www.chipinfo.ru/dsheets/ic/157/157ud2.html (dual LM301)
  4. http://tec.org.ru/board/k553ud2/93-1-0-2179 (LM301)

"Stage 2" ::
(compare → https://ocw.mit.edu/resources/res-6-010-electronic-feedback-systems-spring-2013/textbook/MITRES_6-010S13_chap03.pdf ←) the offset and operation of amplifying cfg. is unreasonably critical to R26 value -- if this is to be "normal" then tuning the real Item to work does not pay off using it instead of LM358 etc. + it's gain seems to vanish fast at higher frequencies (at transient pass even when driven to 10k load ??????) . . . as already said this thing only reacts on control currents R29,-6,10,12,3 -- even if i succeed to match this to d/s ?? will the real thing ever perform that good (not mentioning the wrong/misleading/"of a zero help" schematic diagrams on d/s-s) ... it is better to make your own poor op amp that you know how to tune than keep guessing what this thing suppose to be , how it suppose to perform/work , did it work in a first place (as in a sense of today's op amps)

"Stage 2.a" ::
-- the prev. "Setup" even verifies for 25kHz 12 to 42 V tot supply ???

[Eop]

Monday, January 8, 2018

Regulated single 1.5V AA Led Flaser Concept


there are different 2N3904 models the ones with 100mA I.F and the ones with 150mA I.F -- in REAL implementation of this circuit you may need to multiple parallel these for a switching transistor or use a more powerful low U.CE type one


PS! this is a simulation experiment - the real circuit and components for a similar output parameters may somewhat or significantly differ of those shown in the fig. !!!

about & how we got ↑there↑ ::

initial circuit
the op amp regulation promises worse results than the transistor regulation on the first figure

[Eop]

Saturday, January 6, 2018

Making working/alternate TC4405 model

TEST


CLM


Better than nothing OR the Microchip's model

[Eop]

Monday, January 1, 2018

Web Buck Remake

src. :: http://www.talkingelectronics.com/projects/LEDTorchCircuits/LEDTorchCircuits-P1.html

somehow it did not "work"/simulate too well
???

experimental/unfinished mod. :: with "pulse skipper" for low loads
/// i have no any idea at this point how one should tune the real circuit into proper operating mode . . .




[Eop]

Thursday, December 28, 2017

www voltage multiplier test

src :: http://electricalnote.com/symmetrical-dc-to-dc-converter-with-ic555/
(i donno why they have to post circuits in the web that add up to the climate warming ...)


mod/fix ::
(the circuit'd do better with true complement wave drive -- e.g. -- a RS digital flop driving two powerful buffers -- in our case -- 555-s)



[Eop]

Tuesday, December 26, 2017

the Actual/Built LED verifier

as i was not about to build a PCB for this the sot-jFets were not used . . .

Spice design ::

Real build ::


[Eop]