Abstract
We developed a radio-controlled solar watch with compass, pressure, and temperature sensors. To achieve this product, we developed (1) 2.5V class rechargeable battery, (2) low power consumption microcomputer, (3) compass using magneto-impedance device, and (4) heterodyne receiver IC. In addition, we experimented on mutual influence of the residual magnetic field of antenna and the magneto-impedance sensor, and adjusted the best arrangement condition between them.
