3m-5m Miniature Controller PIR Dectector Module Passive Infrared
Motion Sensor SB412 With Fresnel lens PCB Resistor
Main Parameters
| Type: | SB412 |
| Size: | 18*10mm |
| Supply Current: | DC3V~12V |
| Current Drain: | <20μA |
| Voltage Output: | High level signal:3.0V Stanby output is 0V |
| Delay Time: | Delay time adjustable |
| Operation Temperaute: | -20℃~60℃ |
| Infrared Sensor: | Dual element,Low noise, High Sensitivity |
| Light Sensor: | No CdS |
| TTL Output: | TTL Output can be directly connected to micro-controller or logic
device |
| Sensitivity: | High Sensitivity |
General
SB412A is the latest digital sensor module that based on AM412 digital
sensor. It only contain a
fresnel lens, PCB, and a few resistance
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Lens Information
Lens diameter: 13.6mm (default), detecting angle≤100°, detecting
range<5M.
Compact Size
Schematic Diagram
Application Note
Funtions:
1. DC-INPUT: working voltage or input supply voltage (range is DC
3V-12V)
2. VOUT: signal output pin. Output: High level signal 3V； Standby 0V
VOutput can be as same as DC-Input by adding some components
3. Delay time adjustment: the default delay time is 10s, can be
adjusted by changing resistor(see following delay time adjustment
form)
Delay Time Adjustment
'''What is a PIR sensor?'''
PIR sensors allow you to sense motion, almost always used to detect
whether a human has moved in or out of the sensors range. They are
small, inexpensive, low-power, easy to use and don't wear out. For
that reason they are commonly found in appliances and gadgets used
in homes or businesses. They are often referred to as PIR, "Passive
Infrared", "Pyroelectric", or "IR motion" sensors.
PIRs are basically made of a pyroelectric sensor (which you can see
above as the round metal can with a rectangular crystal in the
center), which can detect levels of infrared radiation. Everything
emits some low level radiation, and the hotter something is, the
more radiation is emitted. The sensor in a motion detector is
actually split in two halves. The reason for that is that we are
looking to detect motion (change) not average IR levels. The two
halves are wired up so that they cancel each other out. If one half
sees more or less IR radiation than the other, the output will
swing high or low.
Along with the pyroelectic sensor is a bunch of supporting
circuitry, resistors and capacitors. It seems that most small
hobbyist sensors use the BISS0001 ("Micro Power PIR Motion Detector
IC"), undoubtedly a very inexpensive chip. This chip takes the
output of the sensor and does some minor processing on it to emit a
digital output pulse from the analog sensor.
For many basic projects or products that need to detect when a
person has left or entered the area, or has approached, PIR sensors
are great. They are low power and low cost, pretty rugged, have a
wide lens range, and are easy to interface with. Note that PIRs
won't tell you how many people are around or how close they are to
the sensor, the lens is often fixed to a certain sweep and distance
(although it can be hacked somewhere) and they are also sometimes
set off by house pets. Experimentation is key!
