Abstract: An all-digital and adjustable scale device comprises at least one load cell, a connection box and a controller housed within a controller main body. The connection box contains a plurality of A/D converters with input connected to corresponding load cell and output connected to a single-chip microcomputer. The controller comprises a control circuit having a microcomputer unit, a keyboard, a display and an interface. The microcomputer unit is connected to the single-chip microcomputer and the keyboard is arranged on the controller main body. The user can input command to the control circuit and controls the single-chip microcomputer through the control circuit for four-corner balance, adjustment, calibration and self-testing.

Abstract: A bicycle signalling device includes a housing, a reflective element for reflecting a light emitted thereto, a signalling lamp near the reflective element, a power source for supplying the lamp, a photosensitive element electrically connected between the signalling lamp and the power source for determining whether the lamp should be energized by the source in dependence upon an intensity of light, and a switch electrically connected between the power source and the signalling lamp for controlling an electrical conduction therebetween. Such device will enable the bicycle to be attention-calling at a dark night.