I remember seeing a guy design a toaster that had a component from a smoke detector in it which (i'm quoting form memory here) monitored the amount of carbon or

I remember seeing a guy design a toaster that had a component from a smoke detector in it which (i'm quoting form memory here) monitored the amount of carbon or something being released (???). The problem, as I'm sure we're all aware, is that toasters are very slow when you start using them, but if you make three or four rounds of toast one ofter the other, each batch toasts quicker. This smoke detector method solved that problem.... Although I've not seen it on the market, so perhaps it didn't work. But still, a novel idea.