  Universal quantum computation may be realized based on quantum walk, by
formulating it as a scattering problem on a graph. In this paper, we simulate
quantum gates through electric circuits, following a recent report that a
one-dimensional $LC$ electric circuit can simulate a Schr\"{o}dinger equation
and hence a quantum walk. Especially, we propose a physical realization of a
set of universal quantum gates consisting of the CNOT, Hadamard and $\pi /4$
phase-shift gates with the use of telegrapher wires and mixing bridges.
Furthermore, we construct the $\pi /2^{n}$ phase-shift gate for an arbitrary
integer $n$, which is an essential element to perform the quantum Fourier
transformation and prime factorization based on the Shor algorithm. Our results
will open a way to universal quantum computation based on electric circuits.
