Tim's Teeny Timer is designed to do one thing: run a small brushed motor for a modest amount of time as inexpensively as possible.
Tim's Teeny Timer was designed to be the timer in Larry Renger's ET-2 control line trainer. Larry and the Knights of the Round Circle put on control line flying demonstrations using Larry's ET-1 trainer, to introduce children to control line flying. This has led to demand for a trainer that the parents of an interested child can buy and take home. This demand, in turn, led to Larry's ET-2.