Battery-free digital tire gauge

A battery-free digital tire gauge for measuring at least one parameter associated with a tire, comprising:

• a housing;
• an electronic circuit assembly in said housing including at least one sensor for measuring at least one parameter associated with a tire, the electronic circuit assembly further comprising a control processor, a display coupled to said control processor, and a charging capacitor;
• a transformer coupled to a gear and ratchet assembly for transforming mechanical motion to electrical energy;
• a depressible handle operatively coupled to the housing, the depressible handle mechanically coupled to the gear and ratchet assembly located in the housing and having a retention spring such that depression of the handle towards the housing drives the gear and ratchet assembly to generate mechanical motion that is transformed into electrical energy by the transformer;
• wherein the transformed electrical energy resulting from said driven gear and ratchet assembly charges said capacitor in said housing to energize a control processor of said electronic circuit assembly and cause said sensor to measure the at least one parameter associated with a tire and display said at least one measured parameter on said display.