Halve Your Processor Power Consumption using Diffusion Capacitance! Dave demonstrates a neat but tricky technique to PWM a processor’s power pin to reduce power consumption. https://en.wikipedia.org/wiki/Diffusion_capacitance
MIT: http://web.mit.edu/6.012/www/SP07-L16.pdf
Colorado University: http://ecee.colorado.edu/~bart/ecen3320/f99/pdf/ch4_4_5.pdf
Forum: https://www.eevblog.com/forum/blog/eevblog-1384-halve-your-processor-power-consumption!/