Dan Marotta wrote on 11/18/2020 8:22 AM:
On 11/17/20 9:04 PM, Moshe Braner wrote:
When the battery in my smoke alarm gets weak, it emits an occasional short beep to remind me.

....And why, pray tell, does that always occur at 0230?

Sorry...* Off topic.

The cooler night time temperature in the house reduces the battery voltage, and the chirps begin...

--
Eric Greenwell - Washington State, USA (change ".netto" to ".us" to email me)
- "A Guide to Self-Launching Sailplane Operation"
https://sites.google.com/site/motorg...ad-the-guide-1