Ever hear of a piezo-optomechanical circuit? We hadn’t either. Let’s break it down. Piezo implies some transducer that converts motion to and from energy. Opto implies light.

You may either use a piezo tweeter or an 8-ohm, 500mW speaker at the output. This simple electronic doorbell has not been tested. During the standby period, the IC consumes nominal current of a few ...

A piezo tweeter has an impedance (this is a posh word for resistance for our purposes) of something like five kiloohms. The 30 ohm resistor would increase this to 5,030 ohms.

"Circuit technology that resolves issues with high-frequency piezoelectric resonators." ScienceDaily. ScienceDaily, 17 June 2016. <www.sciencedaily.com / releases / 2016 / 06 / 160617113519.htm>.

While Murata’s super tweeter is not able to directly reproduce low bass or midrange frequencies, it is able to reproduce the higher-order harmonics of these lower frequencies.