some OP-Amp based regulator check ups

Minimal

Improved -- It seems the LT1086-12 model sets up a little "Show"here . . .

No concert v. -- although it simulates fine /!\ there'll be a point of concern selecting the proper xx78Lxx as the one i got was "factory tuned" to something 12.4V ((+3.3% systematical ? = no problem - the datasheet specifies ±(5% systematic ±0.75% line- (±0.417% load regulation)) =/!\ 12±0.74V )) . . . while the above grid shows some 9±0.00003V load regulation (which in practice should be expected at least 10x worse OR ±0.0033% load regulation) . . . blah, blah

Dual Op.Amp v.

SN7400 RS to "Old style" T - trigger

minimal counter configuration experiment ::

?! it's even possible . . . in theory . . .

+MMXV-02-08 the pulse T-trigger speed test
- thought to run this test in real but . . . what's the point -- it'd take also to build/test/verify a 15M detection circuit - that'd be more complex than the one below . . .

notice the complexity differences in between above and below circuits -- the speed difference seems to be roughly 1:3 . . . such as does it weigh up to gain some more speed by this "investment" , becides pushing the chip to it's limits increases the likelihood for errors

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! Update 2021.08.01 :

found an error in the above circuit , a repair as a   (at the input the XOR must be faster than the NAND-s or the NAND-s should be delayed to be slower for proper operation)

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[Eop]