A new use for old flip-flops: heat! Oct 17, 2018 15:09:12 GMT -5 Quote Select PostDeselect PostLink to PostBack to Top Post by Interesting on Oct 17, 2018 15:09:12 GMT -5 Take an old CD4013 flip flop, wire power to it backwards and you get heat before the magic smoke comes out ... Sorry, bad joke in reference to the other thread.