I just love any pcb populated with components, there is no help. I dont know if there is all be usefull, but I collect em all... In some point, realize that, if I cant find fast some components what I need, it is no efficient to store pcb in this way. Whatching others who desoldering few usefull components, and all other throw away, is no sense to me, because, many time I found that just specific components I need and will be happy when I have it. I try to desolder almost all common component and place it in small bins, but too many components do mess and bin not practical anymore, and many time...

Yes, it can be used as cable tester, but only one wire at the time. In this case the wire must have power in it, which is done by 1.8v power led supply, connection 2-3. If the wire lose connection in a fractial of time, or generate resistance greater then threshold, it beep and the state stay logged on LED. It also can be "self monitored" at some degree, with pins 2-3 connected together with jumper.................. Ocassionally, I need to be sure that some voltage stay all the time in some margin, so the device mostly produce handy audio notifycation if is something out of spec. Target...

I am designing a simple circuit that can catch a narrow glitch in voltage fluctation, and presented in visual/audio way, with as little as posible common type components. The circuit is done on test board and work like I wish. I post schematics here and like to hear a voice of educated electrician, hopefully to insight of some flaw or better design. Thank you ...

It is SOD-87 glass package. The marking is not indicative....

Yes, it has to be OR gate, but while it (new ic) not fit into my need I redesign whole circuit in past few days... anyway, thank you, I almost done in different way... I latch signal with one NOR gate and one transistor...

Ok, according to ben eater rs latch video, I think that there must be OR gate, dont know if can be used any other type of gate to work like one shoot latch? https://m.youtube.com/watch?v=KM0DdEaY5sY

I have simple circuit with cd4001, first is sr latch, which set is inputing from comparator, and reset is inputing from clock. Sr latch output is connected to hard latch I guess, but I do something wrong here... led 2 is flashing just as inverting clock... I want to led2 stay permanently on ance it lock signal, not to be interferencing with invalid state of sr latch. What I doing wrong?...

Mp86941...

Someone comment... The portion showing how to roll back begins at 8:00. Even though I tried to disable automatic updates as Jay recommended, Microsoft immediately reinstalled the same codenamed update without my permission last night after I had watched this video. So I'm honestly not sure how much control I even have over MS pushing out bricking updates anymore, this is making me want to move away from Windows so badly.

Yes, it make sense... I was confusing with too many repeated errors and think there is some catch with diode to help pass current... lame...

Aha, like on mosfets... but on first pictures of psu, how current can pass R15 and R16 its 510 ohm in parallel... 5A!? Thank you

I see on some schematic a diode over power transistor, and dont know is in it some trick to carry current, or what is the point?...