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How do I control LED Strip Light using Door and Hand Sensors?
Linear Lux stocks a range of electronic sensor switches designed for touchless on/off control of low voltage LED lights. Those which offer a dimming function as well are dealt with in a separate blog ( Touch / touchless dimmers ). Likewise, Linear Lux also stocks a range of both touch and contactless controllers for building into LED profile. These likewise are covered in a separate blog.
These devices are totally electronic, with no moving parts to wear, break, corrode, or get out of alignment. They are typically water resistant, but would need some further safeguards for wetter locations. They are suitable for 12/24V DC : for higher currents an amplifier/repeater can increase their current carrying capacity.
These sensor switches can be divided into several groups, according to method of detection.
- PIR motion sensor which senses movement of a warm object ( eg a human body ) across it’s field of view.
- IR sensor, which senses change in pattern of reflected light. This light may be reflected by such things as a hand wave, or an open/closed door.
PIR SENSORS are typically “off” in their normal state, and trigger on when a person moves across their field of view, or approaches the sensor, within a range of around 2 metres. After movement ceases, they stay on for around 40 seconds and await the next trigger. They are not day/night sensitive.
Model PIR02 is a miniature cylindrical sensor ( 17 x 20mm) designed for recessed mounting , and fitted with 2.1mm DC sockets for easy connection to power and LEDs
Model PIR03 is a standard sized cylinder ( 16 x 60mm) with the electronics built into the sensor casing.
Model PIR04 adds a removable flange to PIR03 to enable surface mounting. PIR03 and PIR04 are supplied with 1m wires for input and output.
PIR05 is a typically ceiling mounted PIR controller, well suited to controlling lights in a low population environment, to achieve an energy efficient outcome. The rationale is that some or all of the lights stay off until people enter the area: upon entry, more lights are switched on.
The PIR detector has a maximum range of about 6m. It features a manual dimmer control which adjusts the brightness of the lights. It offers a switch selectable “on” time after last detection of 30, 60 or 380 seconds. It also has a “day/night” mode switch. It operates as normal in both modes during the night. In the night mode, it works as normal at night time, but not during the day.
IR SENSORS are typically activated by a wave of the hand within around 5cm of the face of the sensor (“hand wave”), or by a door or window frame or similar (“door sensor”).
A hand wave sensor will turn the LED on when a hand is waved over it, and off when a hand is again passed over it. Some hand wave sensor switches are supplied with two sensors which act independently, either of which can turn the LED on or off.
A door sensor is generally mounted inside a cupboard and is “off” when the door is closed (i.e. it is looking at an object in front of it), and turns the light on when the door is opened. Some door sensor models are supplied with two or three sensors, so that the internal light turns on when any of the doors is opened. It only goes off when all doors are closed.
Several Linear Lux IR sensor switches offer both hand and door modes, selectable by a slide switch on the unit.
HAND SENSORS are available with different mounting options. IRHD03 is a standard sized cylinder ( 16 x 54mm ) for recessed mounting, with 1m wire tails in and out. IRHD04 adds a saddle to enable surface mounting.
IRHD02 is a miniature cylinder 14 x 18mm ( for recessed mounting ) with 2.1mm DC sockets for input and output connection. IRHD01 is a small surface mount unit ( face 12 x 12mm ) with 1m wire tails, with two tiny flanges for screw mounting.
Likewise, DOOR SENSORS are stocked in a similar range of mounting options. IRDR03 is a stand recessed mount cylinder ( 16 x 54mm ) with 1m wire tails, while IRDR04 uses a detachable saddle to convert it to surface mounting.
IRDR05 is a miniature recessed cylinder ( 14 x 18mm ) with 1m tails.
IRDR01 has a small square face ( 12mm x 12mm ) with tiny flanges for screw securing, and 1m wire tails. IRDR02 is identical to above except it uses 2.1mm DC socketss for in and out connections.
DRHD02 and DRHD03 and DRHD01/DRHDSW offer 2 and 3 sensor options, but with the added versatility of being able to be used for HAND or DOOR applications
DRHD02 is supplied with two 18mm cylindrical recessed sensors. A slide switch on the control unit selects either “hand” or “door” mode. The two sensors operate as described above under the general heading of IR Sensors. If desired, one sensor can be unplugged and the unit works as normal for a single sensor model. DRHD02 is fitted with 2.1mm DC sockets for plug and play operation..
DRHD03 is similar to above, but uses the small square faced 12mm x 12mm surface mount sensors, and has 1m flying leads for in and out connection.
DRHD01 is a cylindrical sensor unit only, which can be surface mounted or recessed. It is used in conjunction with DRHDSW controller which will accept 1, 2 or 3 DRHD01 sensor units. The DRHDSW is easily configured to work in HAND or DOOR mode. Sensor units and control box are sold separately.
