Hey, I recently acquired a new oscilloscope and I'm eager to conduct some tests. I'm particularly interested in simulating a brownout condition to observe its impact on an ATtiny microcontroller. My goal is to use the oscilloscope to visualize the brownout, perhaps around 1.8V. Can anyone provide s…

You know that the way to get a Attiny to trigger it's brownout detection is to "reduce the voltage to below the brownout level". Your question sounds to me that you are asking for a recipe for "baking applepie", but you don't want to use apples.

Digital Scope ? A digital scope stores pre-trigger data. When the Brown-Out is reached, trigger the scope. Scroll back in time on your scope.

[image] swerve0322: simulating a brownout condition to observe its impact on an ATtiny microcontroller Do you mean the ripple on/off of the MCU when it's close to the minimum voltage? You can produce it with a small battery (or a small supercapacitor) and the MCU activating a relative high l…

[image] swerve0322: Can anyone provide suggestions on methods or setups to effectively simulate a rapid voltage drop akin to a brownout in a controlled manner? I think I understand. You could take a second microcontroller, output a PWM signal and run it through an R/C filter. Then use that f…

[image] rsmls: something like this: [image] Thank you very much for your input! That is exactly what I was searching for. I'll try this circuit on the weekend and will report my results. Thanks! ps.: I appreciate your detailed information and explanation! Thanks!

You're welcome, I hope it meets your requirements. A few notes on the R/C filter: this is a compromise between filtering out all ripple and responsivity. You could calculate things, but I prefer to just simulate it to see how it 'feels' and then decide how to proceed. If you need to test very fast …

Suggest you buy these to have on hand for future applications. TL331 SOT23-5 and LMV321 SOT23-5 tl331.pdf 1072.59 KB https://gr.mouser.com/datasheet/2/389/lmv321-1849557.pdf FYI [image] Share tips you have come across General Ele…

[image] swerve0322: simulate a rapid voltage drop akin to a brownout in a controlled manner? What's wrong with manually reducing your lab PSU? You also can attach a big capacitor to Vcc and then detach power.

Beginner: Simulating Brownout for ATtiny Measurement with New Oscilloscope

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LarryD May 2, 2024, 7:46pm 8

Suggest you buy these to have on hand for future applications.
TL331 SOT23-5
and
LMV321 SOT23-5

https://gr.mouser.com/datasheet/2/389/lmv321-1849557.pdf

FYI

example:

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Beginner: Simulating Brownout for ATtiny Measurement with New Oscilloscope

FYI

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