A tire pressure sensor with power generator includes a spool having a coil wound therearound. Within the spool is a pole piece. The tire pressure sensor is installed in a wheel that rotates with respect to a brake clamp. The brake clamp includes a magnetic strip that the sensor moves past as the wheel rotates. As the tire pressure sensor moves past the brake clamp, the magnetic strip causes the coil to output an AC voltage signal. A rectifier circuit connected to the coil converts the AC voltage to DC voltage. The DC voltage is stored in a storage capacitor to be used as needed by an air pressure sensing element connected thereto.