Re: Current consumption of LCD kitchen timer?

On 10/05/2025 14:37, Pamela wrote:

I'm interested to know the current drawn by a kitchen LCD digital
timer.
 (1) How much current does the timer draw when counting time?
 (2) How much current is drawn when the piezo buzzer is sounding?
(Averaging out beeps and silent bits.)
 My guesses are 2mA and 25mA, respectively. Is that about right?
  I mean a timer similar to this one, running off a 1.5V battery.
https://www.amazon.com/Digital-Kitchen-Timer/dp/B00GOPICNM

Second one might be about right perhaps 10mA is more likely but I'd be very surprised if the display operating and timing current was more than 20uA (and it could easily be lower).
Bare metal LCDs take almost no current at all (but have to be driven with an AC signal). They are no different at the core to LCD digital watches with an alarm function probably even using the same chips and a slightly beefier piezo sounder.
--
Martin Brown