systems - solar street lighting system

Input equipment the system input, output and process in the system used by the course designer-key-
The FactInput device receives signals from physical or "real world" and converts them into electronic signals that can be understood and processed by processing devices such as micro-controllers.
Examples of real-world signals include brightness, temperature, and pressure. Examples of electronic signals include voltage and current. "Input" is part of the system that enables the process to start happening: the input device includes light-
Related resistance (LDRs)
Switch and resistor output equipment including speakers and lights-
LEDs (LEDs)
Sensor sensors can be used to detect changes in light, temperature and pressure.
From night lights to safety alarms and central heating systems, they are widely used in a variety of products.
Type of SensorsA lamp-
Related resistance (LDR)
A resistance is a special type of resistance that varies with the photoelectric level.
When the light turns on, its resistance decreases.
So it can be used as a simple light sensor.
The products include solar garden lights and street lamps. Light-
Related resistance (LDR)
The thermal resistor works in a similar way, except that it reacts to changing temperature levels.
Usually, the resistance decreases as the temperature rises, but some of the thermal resistors work the opposite way, and the resistance increases as the temperature rises.
An example of a thermal resistor is in a heating system.
It can be used to check the temperature of the room, and if it is too cold, it can trigger the opening of the heater.
The ThermistorA moisture sensor works when water is connected to two metal tracks or probes.
Anything that contains water can be used as a conductor of electricity, such as soil.
Water use on commercial plant farms-
Sensing technology that ensures that plants are not overwatered or underwatered.
The humidity sensor piezoelectric sensor converts mechanical motion or force into electrical energy and can generate electrical impulses from pressure, for example by hitting it.
The change of pressure will send out a pulse to provide an input signal for the circuit.
They are used in microphones where sound waves generate pressure and generate pulses.
The piezoelectric sensor input device provides the input signal for the circuit.
In addition to sensors, there are other components that can provide input signals for control circuits, such as switches like individual switchespole single-throw switch (SPST)
Lights can be turned on or off.
When the internal contacts are connected together, the switch allows the current to flow through them.
They are usually named after the way they work.
For example, a push-to-
Allows the switch to flow current (
Or the signal to be passed to the processing)
Therefore, the circuit is "manufactured" when pressed. A push-to-
Disconnect the switch reverse and "disconnect" the circuit.
Other examples of switches include: rocker switch tilt switch micro switch (magnetic)
Switch previousnextpreviousnextpush-to-make (PTM)and push-to-break (PTB)
Before switching (magnetic)
The resistance of other control devices limits current flow and protects precision components from overload. Fixed-
The value resistance does not change the resistance, but for a variable resistance, the resistance can be changed.
This helps to control the flow of current and prevent overload of delicate components.
The resident variable resistance allows the user to adjust the resistance by turning the knob.
When used in products such as automatic night lights, the user can adjust the sensitivity of the light
Related resistance (LDR)
Trigger output.
A variable resistor transistor is a half
The conductor to enlarge the signal from the sensor-
It's like a small electronic switch.
The transistor has three legs: when a small voltage at the base connection is detected, the transistor is turned on and the high current can flow through the collector and out through the transmitter.
On-line transistor integrated circuit (DIL)
IC package for integrated circuits (IC)
Protected in a plastic case with two rows of metal legs (
That's why it's called "binary ").
IC is usually placed in a chip holder welded to the circuit board-
Each leg is numbered to identify its function.
Because they are small in size and light in weight, they are usually used for computers, cameras, microwave ovens and televisions.
The two-wire integrated circuit micro-controller is a controllable integrated circuit.
The most common types of micro-controllers are programmable interface controllers (PIC)
It is possible to re-program continuously to complete various tasks, such as controlling the setting or temperature in the microwave oven, or running a specific washing cycle in the washing machine.
Pictures have a variety of different memory sizes and different numbers of pins
Each pin can be connected to the input or output, so the number of devices that can be connected will also increase as the pin increases.
The more memory or pins available, the greater the cost of the PIC.
They are used in most modern electrical products, such as television and audio.