On 16/05/2016 07:36, DaveC wrote:
http://imgur.com/Trvs5mk

This is a beeper piezo in a Fluke 117 DMM which quite beeping. Scoped the
piezos pads and... nothing.

An inverter (from the CD4069) is connected across the piezo. Guess I dont
understand anything about driving piezos.

Is this a standard practice?
Cheers.


My Fluke 77, will beep when the battery is low but not low enough to
trigger the LCD legend, presumably drift over time