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10 жыл бұрын

Part 3 in the Precision Current Source series.
Dave breadboards a classic precision low current source circuit using the 10V REF102 voltage reference to generate accurate 1mA and 1uA currents.
Also some talk about the errors in a typical precision circuit like this.
Part 2: • EEVblog #577 - Precisi...
Part 1: • EEVblog #567 - Precisi...
REF102: www.ti.com/lit/ds/sbvs022b/sbv...
App Note: www.ti.com/lit/an/sbva001/sbva...
OPA277: www.ti.com/lit/ds/symlink/opa4...
VishayPG VHP100: www.vishaypg.com/docs/63003/vh...
Forum: www.eevblog.com/forum/blog/579...
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Пікірлер: 95

@EEVblog 10 жыл бұрын

BTW, this should be one of my best quality videos ever, no extra compression using Handbrake. The file size was maybe 3 times bigger than my usual uploads.

@iSolarSunrise 10 жыл бұрын

When I first clicked on the video, I complained "WTH another precision current source video? This is boring..."

@meowcula 10 жыл бұрын

No problems with video here.

@Graham_Wideman 5 жыл бұрын

Hey wait a sec...

@jbuddyman 10 жыл бұрын

I told my science teacher to check you out, because you are so awesome. Keep up the good work, and happy engineering!

@mortenlund1418 2 жыл бұрын

You are awsome. These videos must end up as classic mandatory educational material - thanks thanks

@linksmith1057

I know this is old, but Dave you just solved an issue I’ve been having for weeks building a precision programmable constant current source for testing LED Luminosity. Used a rail to rail op-amp configured as a voltage follower and never have been able to get the damn thing to drop its current below 500 micro amps.

@ianc4901 10 жыл бұрын

I get the impression that you can do all of this kind of stuff in your head and don't actually need to breadboard or measure anything, you just do it for demonstration purposes, thanks for taking the time and trouble !

@nixie2462 10 жыл бұрын

Yes, we enjoyed them!

@jjoster 10 жыл бұрын

I really enjoyed this one Dave. Thank you.

@HowToGuys 8 жыл бұрын

I always wanted to learn something new in this way!

@EPaulIII Жыл бұрын

I know this is an old one, but thanks, it is exactly what I need right now. If I can only find a source for the REF102 at 0.025%. Everybody seems to be out of stock.

@tubical71 10 жыл бұрын

Here YT let me select 1080p, thanx dave !

@ungerNati 10 жыл бұрын

just a great lesson learned, thanks for sharing.

@Scorpio722 3 жыл бұрын

Enjoying your well done videos and projects, thank you for the excellent

@uN1Qu3DZ 10 жыл бұрын

Yeah, took a while for the video to finish processing, we're a bunch of geeks who just can't wait to see the latest EEVblog :) Just youtube processing taking its time to finish, as this is another fairly long vid.

@DavidLeeMenefee 10 жыл бұрын

Good audio and video here. Thumbs up.

@DAR00ST3R 10 жыл бұрын

You rock Dave!

@metaforest 10 жыл бұрын

thanks again for showing how to read through test-config induced noise!

@uski 10 жыл бұрын

My guess : Either Dave needs a way to check the accuracy of the µCurrent, or we'll soon see a µCurrent Platinium edition with 1A, 1mA, 100µA and 1µA current sources built in... :)