L0803SER I bought two sensors, the first of dealextreme under number 35465, starting at around 5.30

Small lights with motion sic sensor (PIR) are suitable for illumination indicative corridor during night walks residing in the refrigerator, for example:-) except for a negligible amount of electricity saving general lighting that would be ruined frequent switching and moreover nothing should be switched on and off manually.
PIR is short for passive infrared sensor, that operates by sensing thermal radiation in the infrared range of people. Their movement is changing the output of such a sensor and this change causes illumination to turn on a defined time. The sensor is also used to detect sic on that during good light conditions not turn on lighting to save battery.
L0803SER I bought two sensors, the first of dealextreme under number 35465, starting at around 5.30. At the time of purchase was the cheapest in this trade. The label on the box AUTO PIR LED Light L0803SER. List of parameters: LED: 8 pcs, 80000h sensor:> 3m, 120 degrees Power: 2x AA battery, 70uA standby, 70 mA Dimensions: 98x98x40mm 100g off time: 50s
The measured sic consumption and sits in the range of 70-80 mA using 2x 1.2V NiMh battery. When battery capacity 1400-2000mAh sic should therefore lasts up to 17 to 28h taste. In standby plays a greater role self-discharge batteries.
Batteries are after power switch sic OFF -> AUTO connected to the inverter sic circuit ME2180, which increases the voltage of the battery 2,2-3V (descending burden and age) to 3.3V. Because of this tension is powered PIR detector circuit BISS0001 which evaluates the signals and switches sic NPN transistor 8 parallel LEDs. These diodes burden voltage converter to its output drops to 2.7V.
XGCL-08M As the second sic I bought at a bargain price of about 3.36 in Kauflande light with German description Bewegungsmelder mit Licht. The label on the box XGCL-08M Extract parameters: LED: 5pcs activation temperature: <30 lux ambient light sensor: 5m, horizontal 130 , vertical 100 degrees Power: 3x AA battery, 4.5V 0.3W Dimensions: 125x100x125mm off time: 30s
It includes a switch having three positions. In one light is permanently switched on (ON) and then to the base of the switching transistor LED brought positive voltage. In the AUTO position, the voltage fed to the power detector movement through step-down voltage sic converter. This inverter supplies PIR sensor and circuit sic processing the sensor signal BISS0001, the same as in the previous light.
The measured consumption about 50 mA. 40-50uA in standby. As the intensity was high, I decided to disconnect every even LED and 3 remained together for taking 30 mA. In this engagement would then light to withstand 66 hours of continuous sic lighting.
Consumption in this case the discharge of batteries decreases strongly, together with it, the luminous sic intensity. In complete darkness, however, sic sufficient to see the outlines of the walls. In the case of low battery voltage sic is 2.8V, about 2.6V after exercise, which will reduce the current LEDs so that the entire beam is taken about 4 mA. With such a load battery lasts a really long time.
More expensive light from DX gives the impression of better and more robust construction. However, the battery unnecessarily difficult to go pick it up and needed a screwdriver to pry them. As it seems unnecessarily complicated use of two switches. Offered as the main advantage of smaller size, stronger lighting and the use of only two batteries, but the package does not contain.
Inexpensive light from Kauflandu sic contrast, operates inside a cheap feel. In light are used screws sic lowest price, have essentially flayed cross head at the factory. Outwardly offers attractive design, easy going. When shocks and downs but easy to flunk unfixed battery. Can be regarded as a disadvantage also need to 3 AA batteries, but they are despite the lower price bundled light.
In terms of wiring, the advantage due to higher voltages or other involvement substantially lower battery consumption. Moreover, consumption sic decreases during the discharge, thereby extending battery life even more.
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