Specifications
Photodiode sensor
detect the ambient brightness and light intensity
adjustable sensitivity adjustment digital potentiometer
Photodiode sensor
1 can detect the ambient brightness and light intensity (photoresistor, directional, you can sense the fixed direction of the light source)
2 adjustable sensitivity adjustment digital potentiometer (shown in blue)
3 Operating voltage 3.3V-5V
5 output in the form of a analog voltage output
b digital switch outputs (0 and 1)
6 with fixed bolt hole for easy installation
7 board PCB size: 3cm * 1.6cm
Three module interface (4 wire)
The VCC external 3.3V-5V voltage (directly connected to the 5v microcontroller and 3.3v microcontroller)
2 GND with an external GND
DO small board digital output interfaces (0 and 1)
AO small board analog output interface
Four instructions
A photodiode module to ambient light the most sensitive, generally used to detect the brightness and intensity of the surrounding environment, in most cases with the photoresistor sensor module generic, distinguish between the two is that the directionality of the photodiode module better, you can sense a fixed The direction of the light source.
2 module in the light conditions or light intensity of less than a set threshold, the DO output port high, when the outside ambient light exceeds a set threshold, the module D0 output is low;
3 board digital outputs D0 can be connected directly to the microcontroller through the microcontroller to detect high and low, and thus to detect environmental changes in light intensity;
4-board digital output DO can drive OUR relay module, which can be composed of an optical switch;
5 small plates analog output AO OUR AD module connected through the AD converter, you can get the light intensity in a more accurate value;
Five test instructions
Shop 51 development board with a photodiode module test
Wiring instructions:
Module VCC connects development board VCC
The module GND development board GND
Then the VCC and GND, the module power indicator will light
Module to place the light source, adjust the board of the blue potentiometer, until the on-board switch light, and then hands over the photodiode module switch indicator will be off. Hands off switch indicator is then lit. This phenomenon is known, the light can trigger module, so that the switch indicator lights.
In addition information which comes with a 51 program, used to detect the high and low of the photodiode module digital interface D0
Specified as follows:
Wiring:
Module VCC connects development board VCC
The module GND development board GND
Module D0 connected to development board P0.1
SCM: STC89C52
Serial port to send data baud rate: 9600
Phenomenon: a light trigger module, serial continue to send 01, while the switch light;
Module light source is triggered, the serial port does not send data to switch lights off.
Six-invoice
As shown photodiode sensor module is a (test passed)
The 20cm DuPont Line 4
Download Address (schematic + + test program) after payment or receipt of goods, contact us.
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