/members-area/personalblogs/b/blog/posts/scits-timer-project-3---timer-conceptThis blog will look at the initial concept I have for building the timer. When built, this timer will form part of the initial tests I do when setting up for protection relay tests to show that the apparatus is performing correctly. Testing the ...en-USTelligent Community 12https://community.element14.com/members-area/personalblogs/b/blog/posts/scits-timer-project-3---timer-conceptFri, 02 Feb 2018 02:45:24 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:6312eba4-4ac4-4e0b-96e6-6a68ec1ad6bdjw07521<p>Hi Donald,</p><p>This looks like a very interesting build. I hope you continue to post it so we can all enjoy your success.</p><p>John</p><img src="https://community.element14.com/aggbug?PostID=4170&AppID=293&AppType=Weblog&ContentType=0" width="1" height="1">https://community.element14.com/members-area/personalblogs/b/blog/posts/scits-timer-project-3---timer-conceptThu, 01 Feb 2018 20:52:55 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:6312eba4-4ac4-4e0b-96e6-6a68ec1ad6bdgenebren1<p>Donald,</p><p>&nbsp;</p><p>Your plans are coming along nicely.&nbsp; This looks pretty good.&nbsp; I would just make a couple of suggestions, mostly relating to the usage of li-ion batteries (should you decide to go in that direction).</p><p>My experience is that it is much simpler to design a single cell system and use a boost circuit to get your 5V (in place of your regulator).&nbsp; In addition, you would want to add a monitor/shutdown circuit that would turn the boost off iv the battery voltage drops to 2.5V (or 2.7) to protect the battery.</p><p>Good luck on your project!</p><p>Gene</p><img src="https://community.element14.com/aggbug?PostID=4170&AppID=293&AppType=Weblog&ContentType=0" width="1" height="1">