AVT1996 Bedlight Night-Light Controller with Motion Detector User Guide
- October 29, 2023
- AVT
Table of Contents
1996 Bedlight Night-Light Controller with Motion Detector
User Guide
AVT1996 Bedlight Night-Light Controller with Motion Detector
A motion-sensing timer switch with flexible configurable operating parameters. It acts as an automatically switched night-light and is designed for use with LED strips. Detection of movement in a room with poor lighting conditions triggers a timer circuit, seamlessly brightening the LED light source attached to the output. After the time set by the potentiometer has elapsed, it is smoothly and slowly extinguished.
Specifications
- integrated motion and light sensor
- adjustable motion detector sensitivity
- adjustable operating time: 15 sec. – 8 min.
- maximum load: 12 V / 5 A (60 W)
- supply: 12 VDC
- small size: 33×66 mm
Circuit description
This controller is a perfect solution for the bedroom or children’s room. The
device together with an LED strip mounted under the bed (bedlight), will make
it easier to get up at night and provide a sense of security. The lighting
will be switched on when the user enters the room or when they touch the floor
with their foot. The gently brightened light, which will not wake up the
others, works well when the child gets up during the night or when we are to
take care of them.
A schematic diagram of the controller is shown in Figure 1. The circuit
described is switched on between the power source and the receiver. It must be
supplied with DC voltage, this can be a battery or any power supply with a
current capacity equivalent to the attached load. The D1 diode protects the
circuit from being connected to a voltage with wrong polarity. The input
voltage is applied to stabiliser IC1 type 78L05, while capacitors C1-C4
provide adequate filtering of this voltage. The operation of the circuit is
controlled by an IC2 ATTINY25 microcontroller. Photoresistor PH1 acts as a
twilight sensor, so that the light source connected to the output of the
system will only be switched on in poor lighting conditions. A popular and
inexpensive PIR detector of the HCSR501 type was used as the motion sensor.
The sensor’s range is a maximum of 7 m with a viewing angle of 100 degrees. A
jumper located on the sensor allows you to change the way it reacts when
motion is detected. Set in the “H” position, it keeps the detector output
active as long as motion is detected. Whilst, the jumper in the “L” position
configures the detector in such a way that once any motion is detected, the
detector output remains activated for a preset time according to the
potentiometer setting. Reactivation of the sensor is possible after
approximately 3 seconds. The detector’s operating range can be adjusted via a
potentiometer, which is mounted closer to the configuration jumper, from
approximately 3 to 7m. The second potentiometer adjusts the detector’s
activation duration when object movement is detected, between 5 and 200
seconds. Operation of the module starts as soon as the supply voltage is
applied. The actuating element is a T1 transistor of type IRL3705. Lighting
time of the light source connected to the output can be adjusted via
potentiometer PR1 from approximately 15 seconds to approximately 8 minutes.
Each time movement is detected, the time starts counting down from the
beginning. Function of the motion detection indicator is performed by LED.
Figure 1. Schematic diagram
Mounting and start-up
The unit must be mounted on a 33x65mm PCB, the mounting diagram is shown in
Figure 2. Start mounting the circuit by soldering resistors and other small
components onto the board, and finish by assembling the socket, electrolytic
capacitors, transistor, screw terminals and PIR module. Once assembled, the
system is immediately ready for use, requiring only the appropriate
configuration.
Figure 2. Arrangement of components on the PCB
List of components
Resistors:
| R1, R3, R4: | 2.2 kΩ |
|---|---|
| R5: | 1 kΩ |
| R2: | 22 kΩ |
| PH1: | Photoresistor |
| PR1: | mounting potentiometer 10 kΩ |
Capacitors:
| C1, C2: | 100 μF / 16 V ! |
|---|---|
| C3, C4: | 100 nF |
Semiconductors:
| IC1: | 78L05 ! |
|---|---|
| IC2: | IRL3705 ! |
| D1: | 1N4007 ! |
| LED1: | LED ! |
Other:
HC-SR501 motion detector !
| IN, OUT | DG301-5.0/2 |
|---|
Begin assembly by soldering the components onto the board in order of size
from smallest to largest. When mounting components marked with an exclamation
mark, pay attention to their polarity This symbol means do not dispose of your
product with your other household waste. Instead, you should protect human
health and the environment by handing over your waste equipment to a
designated collection point for the recycling of waste electrical and
electronic equipment.
AVT SPV reserves the right to make changes without prior notice.Installation
and connection of the appliance not in accordance with the instructions,
unauthorised modification of components and any structural alterations may
cause damage to the appliance and endanger persons using it. In such a case,
the manufacturer and its authorised representatives shall not be liable for
any damage arising directly or indirectly from the use or malfunction of the
product.
The self-assembly kits are intended for educational and demonstration purposes
only. They are not intended for use in commercial applications. If they are
used in such applications, the purchaser assumes all responsibility for
ensuring compliance with all regulations.
AVT SPV Sp. z o.o.
Leszczynowa 11 Street,
03-197 Warsaw, Poland
https://sklep.avt.pl/https://serwis.avt.pl/manuals/AVT1996_EN.pdf