An injection device comprising: an energy source configured to power an electronic component; a priming component configured to convert a mechanical impulse into a trigger; a plunger (108, 109) configured to transmit the trigger from the priming component to a bearing; the bearing configured to provide firm mounting to an end of the plunger (108, 109); a reactant (111a, 111b, 111c) included in the bearing and configured to initiate a thermochemical reaction that generates an instantiation signal transmittable through the bearing in response to receiving the trigger, wherein: the reactant (111a, 111b, 111c) is configured to shift from a first position to a second position to generate the instantiation signal; and the instantiation signal comprises a photo-signal and the reactant (111a, 111b, 111c) comprises one or more reactants configured to generate a luminescent reaction in response to the trigger; and the reactant (111a, 111b, 111c) comprises a first reactant and a second reactant, at least one of the first reactant and the second reactant comprising a fluid reactant, the first reactant and the second reactant being separated from each other by a fluid impermeable membrane that is configured to be pierced in reaction to the trigger to enable interaction between the first reactant and the second reactant; and a sensor (103a, 103b, 103c) configured to detect and process the instantiation signal and generate an activation signal to activate the energy source, the activation signal comprising a wakeup signal to power the electronic component of the injection device. an energy source configured to power an electronic component; a priming component configured to convert a mechanical impulse into a trigger; a plunger (108, 109) configured to transmit the trigger from the priming component to a bearing; the bearing configured to provide firm mounting to an end of the plunger (108, 109); a reactant (111a, 111b, 111c) included in the bearing and configured to initiate a thermochemical reaction that generates an instantiation signal transmittable through the bearing in response to receiving the trigger, wherein: the reactant (111a, 111b, 111c) is configured to shift from a first position to a second position to generate the instantiation signal; and the instantiation signal comprises a photo-signal and the reactant (111a, 111b, 111c) comprises one or more reactants configured to generate a luminescent reaction in response to the trigger; and the reactant (111a, 111b, 111c) comprises a first reactant and a second reactant, at least one of the first reactant and the second reactant comprising a fluid reactant, the first reactant and the second reactant being separated from each other by a fluid impermeable membrane that is configured to be pierced in reaction to the trigger to enable interaction between the first reactant and the second reactant; and the reactant (111a, 111b, 111c) is configured to shift from a first position to a second position to generate the instantiation signal; and the instantiation signal comprises a photo-signal and the reactant (111a, 111b, 111c) comprises one or more reactants configured to generate a luminescent reaction in response to the trigger; and the reactant (111a, 111b, 111c) comprises a first reactant and a second reactant, at least one of the first reactant and the second reactant comprising a fluid reactant, the first reactant and the second reactant being separated from each other by a fluid impermeable membrane that is configured to be pierced in reaction to the trigger to enable interaction between the first reactant and the second reactant; and a sensor (103a, 103b, 103c) configured to detect and process the instantiation signal and generate an activation signal to activate the energy source, the activation signal comprising a wakeup signal to power the electronic component of the injection device.