Abstract: A wireless measuring device 1 is provided which includes a plurality of child units 2 and a parent unit 3 to receive data measured by these child units 2 by wireless communication. Each of the child units 2 has a controlling section 20 that can move to a standby state, a measuring section 21, a signal receiving section 22 to receive a measurement instructing signal from the parent unit 3, and a signal transmitting section 23 to transmit the measured data by wireless communication. The parent unit 3 has a signal transmitting section to transmit the measurement instructing signal to each of the child units 2 and a measured data receiving section 32 to receive measured data to be transmitted from the signal transmitting section 23.

Abstract: A wireless measuring device 1 is provided which includes a plurality of child units 2 and a parent unit 3 to receive data measured by these child units 2 by wireless communication. Each of the child units 2 has a controlling section 20 that can move to a standby state, a measuring section 21, a signal receiving section 22 to receive a measurement instructing signal from the parent unit 3, and a signal transmitting section 23 to transmit the measured data by wireless communication. The parent unit 3 has a signal transmitting section to transmit the measurement instructing signal to each of the child units 2 and a measured data receiving section 32 to receive measured data to be transmitted from the signal transmitting section 23.

Abstract: An LED lamp device of the invention includes a power supply unit (102, 103) supplied with an alternating-current power supply voltage, and an LED lamp (106) constituted by one or a plurality of serially connected LEDs connected to output terminals of the power supply unit (102, 103). The power supply unit (102) obtains a rectified wave of the alternating-current power supply voltage, admits electric power for only part of a time period in which the voltage of the rectified wave corresponding to each half period of the wave of the alternating-current power supply voltage is higher than or equal to a predetermined value, and uses the electric power as power for lighting the LED lamp (106).