Is it possible to make a home made infra red timer from electric store supplies and enough electricity knowledge ?
I mean… If an infra can set up an alarm… why can’t it set up a stop watch ?
Of course you could. If you get stuck you could always contact Dr Emmett Brown 
Of course you can. But is it sensible to do so? How much time, labor, and parts will it take to effectively duplicate what you can buy?