Using GPS Analog Clock as a lpps signal source

摘要

We've previously described using a GPS module as a source of a very accurate (in the long term) one pulse-per-second (lpps) signal. For example, see the GPS lpps projects in the March 2008, February 2013 and April 2013 issues. However, operating these devices from a small battery is not practical since the GPS module needs to be powered for the whole time and it draws around 50mA continuously.