More about comparators

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Күн бұрын

Пікірлер: 24

@mightymulatto3000 10 ай бұрын

This reminds me of an access control circuit. Just got to hook up a power supply and a mag lock to that relay and you can lock all the doors wirelessly by just turning off the lights! In the schematic I saw interfacing with relays they usually had the comparator output hooked up to a resistor at the base of a transistor and the relay connected to the collector, Vcc and a diode to suppress voltages from the interfacing device.

@ericsmith7988 2 жыл бұрын

Had an awful time trying to get this circuit to work for a project. You know it helps when you use the correct chip. Tried using a LM393, but thought I was using a LM358. Getting old I agree. Nice video, not sure if you look at the comments on old videos anymore! Thanks always.

@rogzie 7 жыл бұрын

postive feedback with hysteresis would be greate with the reelay thing. Keep up the nice work!

@georgechambers3197 7 жыл бұрын

That clears things up a little more. Thanks!

@michaelpadovani9566 7 жыл бұрын

Clear and concise, well done

@learnelectronics 7 жыл бұрын

+Michael Padovani Thank you my friend. Hows the little one & new mom doing?

@michaelpadovani9566 7 жыл бұрын

learnelectronics both doing well thanks for asking. I can't believe how often she eats. A true Italian lol.

@learnelectronics 7 жыл бұрын

+Michael Padovani oh yeah, I remember when my 13 year old son was a baby, eat-sleep repeat. I'm Italian too. Feed her some gnocchi.

@kgparanormal 6 жыл бұрын

even with ldr you could add a little motion sensor in

@protocolfree 5 жыл бұрын

nice work

@keithking1985 5 жыл бұрын

Can these be used to run 7 segment displays. Basis ones for just counting up and down???anyone??

@carldavis8228 7 жыл бұрын

Just one question! Is there a reason to use an OPAMP like the TL072 as a comparator, instead of using say an LM339 which is designed to be a comparator? Now I have used the fourth input of the TL074 as a comparator since I already had it in the system as an amplifier. I did not want to add in another chip.

@learnelectronics 7 жыл бұрын

+Carl Davis No reason, just an example on how any opamp can be a comparator

@argcargv 7 жыл бұрын

Except that a comparator will be much faster at switching than an op amp. The op-amp will only transition as fast as the slew rate allows, which often is fairly slow in comparison to a true comparator.

@samuelramirez1821 3 жыл бұрын

@@learnelectronics hello I have the UA741 op amp but I can't manage to get -Vsat as my output. My output is always positive building the same comparator as you. Turning the potentiometer leads the led to shine strong or weak. only 2 possibilities so I have the digital output but always positive ... Thank you for all your videos by the way :)