Back again! Why don't you post a circuit for a bulb monitor instead of nit picking my circuit- Oh yes, I remember now, you did once and we saw the results of all your theories.
I still don't get your thing about circuits...
You are nit picking. It is the architecture that is important. But as a matter of interest show me your calculations of how much current Q2 would conduct... 1uA, 1mA, ... 100A?
If architecture is important, the OP opened with it; indeed, I corroborated that from an analytical perspective. Just a matter of implementation then. Which means... yes, arguing about component choice as well as value.
![Huh? ???](https://www.eevblog.com/forum/Smileys/default/huh.gif)
It's about 1mA by the way, and no, it's very unlikely to cause a problem; but it's a poor design pattern that's very easily corrected, so it's always near the top of the list.
(One could also save even more with a "digital"/"prebiased" transistor, but the OP probably isn't making a million of these so normal discretes will be fine of course.)
So what. It is not up to you to define what components I can specify.
Did I?
I'm hardly writing a dictionary over here... (cough, though I've probably posted a few of them's worth here over the years..)
Besides I have had this argument before from theoreticians who like to display there superior knowledge.
Is that what you think I am, an armchair troll?
(Do you also make a habit of ignoring anyone who is right and outspoken, because clearly they must be an egoist?...)
Those of us that design products that go into the market know that it is ridiculous to design right on the edge. I have seen quite a few 1N4148/1N916 fail when used for relay snubbing and inductance catching. The 1N4148 is designed for fast low level signals. Using your criteria practically every component in circuits are overkill.
Hm, did I define a criteria?
I like the implication that I haven't made or sold anything, though.
I don't know what your problem is, but on a general note, can you please stop following me around EEV, which you have been doing since I recently started posting again. You, and a couple of others, are making a nuisance of themselves and wasting my time- like now.
Coincidence? I don't care to read or reply to every single thread, just those that look of interest of course.
Indeed, when I first noticed some of your posts, I thought it very interesting -- new design blood is an uncommon sight here. It's probably more than coincidence, if we're drawn to the same sorts of threads more than chance.
I'm sure this is my fault -- I enjoy a good rousing critique myself, and easily forget how sensitive others can be about their work. I also tend not to emote very well in written form. If it helps, try to read my posts with a disinterested voice. I generally want to be helpful, or try to be; eh, not that that necessarily means anything (I can think of more than a few bad people who claimed the same thing.. the context here is hopefully very different, at least).
What I can't understand is that there are hundreds of circuits posted on EEC, some with obvious problems, where you could display your wide knowledge, but you say not a word. ![Angry >:(](https://www.eevblog.com/forum/Smileys/default/angry.gif)
I probably tend to avoid threads with problems so obvious that the subject gives it away. Hmm, clearest example that comes to mind: an ESL* struggling with a technical subject AND a language barrier. I just can't be of much help when it's apparent that I won't be understood.
![Sad :(](https://www.eevblog.com/forum/Smileys/default/sad.gif)
Fortunately, the demographics here are quite diverse, and someone with better knowledge of the language barrier will be of greater help than I can.
*English Second Language.
Or, there's only so much talking I can do to a brick wall. That 30V 3A bench supply megathread is a classic example...
Cheers,
Tim