Cartoon / caricature drawn to illustrate the frustrations of a power supply designer. This drawing was drawn specifically to illustrate even though power is needed by all electronic systems, it is difficult to design power supplies. I used this in my Online Power Design Tools: Past, Present and Future, industry session, American Power Electronics Conference (APEC), Long Beach, 2016.

See the presentation here: https://www.ti.com.cn/cn/lit/wp/slyy090/slyy090.pdf