under voltage

I'm looking to get some help in designing a board that takes an input voltage and confirms if the that voltage resides between V = 27.5V and V = 29.5V without an external power source. When the input voltage is between this range I would like an LED to light up. So far I've been exploring using...

Hello, I have small StormCat 63cc gas generator that I bought for power backup some six years ago. It has been broken in for some three hours and then stored in my garage until recent times when we start having outages here in NorCal. When I pulled it and started engine it was not producing any...