Explained here is the idea of the time-space circuit, a basic feature of how a proposed scheme of time-points interact in space with each other, taking note of their time-before, time-now, and time-after attributes in the context of an arrow of time. The explanation here also presents two associated concepts as a way to measure the overall Temporal Mechanics scheme, namely how the time-space circuit links a “time-space manifold” with a resultant “time-space constant”, here as the constant values of the vacuum energy (CMBR) and associated vacuum permittivity and permeability that are rendered through the Magnetic Quantum Shell (MQS) time-space manifold scheme, from the microscopic scale to the cosmological, here as a demonstration primarily of the time-space circuitry. This paper shall be the first of 3 papers on the Temporal Mechanics subjects respectively of “time-space circuits”, “time-space manifolds”, and then “time-space constants”.