Posts tagged ‘Op Amp’

How does Vacuum Cleaner Clean/Dirty Indicator Work?

I have always wondered how the clean/dirty indicator on my Hoover vacuum cleaner works. So when it was time to replace it with a new one, I opened up the old vacuum and took out the “dirt finder” circuit board. As you will see in the video below, it is actually quite clever! Continue reading ‘How does Vacuum Cleaner Clean/Dirty Indicator Work?’ »

Visualizing Comparator and Op Amp Hysteresis

Hysteresis can be added to a comparator circuit to improve its stability, especially when the input signal is noisy. In this post, we will examine the hysteresis characteristics of some common comparator and Op Amps using an oscilloscope. Continue reading ‘Visualizing Comparator and Op Amp Hysteresis’ »