Motion Detector Operation; Motion Detector Testing Results; Motion Detector Current Consumption Results; Smoke Sensor Operation - Renesas RL78/I1D User Manual

DETECT-IT RL78/I1D detector boards kit

Motion Detector Operation

9.3.1

Motion Detector Testing results

The RL78/I1D-based motion detector works well. It is able to detector a motion of a human with a mass of 50kg or
greater from distance of 4m. The Motion detector board can be fine-tuned with the potentiometers JP9 and JP12. Please
refer to the description of the potentiometer JP9 and JP12 for more details. Once the motion is detected an alarm will
sound.
9.3.2

Motion detector Current consumption results

The motion sensor works well and meets standby current spec <42.3µA average.
Standby current is about 30µA @2.7V and 34µA @3.3V supply voltage. Out of this total, about 19-20µA is current
drain into the PIR sensor itself thru the R87, 47K resistor. The remaining current drain of 14µA is from the resistor bias
networks, 2 channels of operational amplifier enable in low power mode, comparators enable in low speed/window
interrupt mode, and MCU STOP mode currents (~0.6µA including 32 KHz/RTC, and LVD enabled). Alarm mode
current is ~66mA at VDD = 2.9V-3.0V with external power supply. This current is primarily due to buzzer current, as
the MCU only draws ~1.3mA typical @8MHz.
Current measurement can be done at J1 and J2 jumpers, using an ampere meter.
The power consumption of each detector board is the sum of VDD current (measured at J1) and VDD_SENSOR current
(measured at J2).
So when you are doing current measurement, you should remove the jumper and place the ampere meter for doing your
measurement.
J1 and J2 should be then be in position for normal operation of the board with battery or with E1 connection (CN02
power). When measuring current at J1 for example, J2 jumper should always be in place, and vice versa.

Smoke Sensor Operation

9.4.1

Smoke Detector Testing results

The Smoke sensor can be tested easily by putting any obstacle between the Infrared emitting LED and the Infrared
Photodiode. Smoke sensor also works well with "Smoke Check" and "Smoke-In-a-Can" brand spray cans. After about
0.5 to 1 second of Smoke spray, the alarm acts within 3 seconds and turns on alarm for multiple cycles of 6 seconds ON
and 3 seconds OFF.
9.4.2

Smoke detector Current consumption results

UM-YDETECT-IT-RL78 V1.30
Figure Measurement for Motion detector
Kit User Manual
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