Introduction to nanoelectronic single electron circuit design Introduction Tunneling experiments in nanoelectronics Current in electrodynamics and circuit theory Free electrons in quantum mechanics Current and tunnel current in quantum physics Energy in circuit theory Energy in the switched two capacitor circuit Impulse circuit model for single electron tunneling zero tunneling time Impulse circuit models for single electron tunneling nonzero tunneling times Generalizing the theory to multi junction circuits Single electron tunneling circuit examples Circuit design methodologies More potential applications and challenges