Abstract: A card reading apparatus for use with a personal handheld device is provided, wherein the personal handheld device has an audio socket for connecting with earphones or other corresponding devices. The card reading apparatus includes: a battery unit; a voltage stabilizer unit; a microcontrol unit; a contact terminal module; a digital-to-analog converter electrically connected to the microcontrol unit; an audio plug electrically connected to the digital-to-analog converter and removably connectable with the audio socket of the personal handheld device; and a mobile application program (APP) stored in a recording medium so as to be installed in the personal handheld device, wherein the mobile application program can interpret the data transmitted from the microcontrol unit through the digital-to-analog converter and the audio plug.

Abstract: A warning lamp assembly for use in a safety helmet is disclosed to include a watertight housing having a part thereof transparent, a circuit board mounted inside the housing and carrying a control circuit, a direction and speed sensor and a warning lamp set that are electrically connected together, a battery pack mounted inside the housing and electrically connected to the circuit board to provide battery power to the components at the circuit board, and a mounting device located on the outside of the housing and detachably connectable to a safety helmet. Thus, the warning lamp assembly has the characteristics of simple structure and ease of installation and is detachably connectable to a safety helmet.