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We present the observation of diabolic points in Hermitian and non-Hermitianelectronics dimers. The condition of unbreakable Parity-time symmetry isestablished for both PT-symmetric ZRC and RLC dimers. We show how appearsnon-Hermitian degeneracy points in the spectrum and how they are protectedagainst a Hermitian perturbation. When a non- Hermitian perturbation is addedin the setup, the non-Hermitian diabolic point (NHDP) turns into a ring ofexceptional points as in some Dirac and Weyl semimetals. Some experimentalsimulations of oscillations around these particular points in LTspice are inperfect accordance with the one predicted analytically and numerically. Thiswork opens a gold road for investigations on topological electrical circuitsfor robust transport of information at room temperature.

Observation of Hermitian and Non-Hermitian Diabolic Points and Exceptional Rings in Parity-Time symmetric ZRC and RLC Dimers