![Saturated Core Reactor](data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSI0NjgiIGhlaWdodD0iMjAyIiB2aWV3Qm94PSIwIDAgNDY4IDIwMiI+PHJlY3Qgd2lkdGg9IjEwMCUiIGhlaWdodD0iMTAwJSIgc3R5bGU9ImZpbGw6I2NmZDRkYjtmaWxsLW9wYWNpdHk6IDAuMTsiLz48L3N2Zz4=)
Saturated Core Reactor acts as a variable inductance connected in series with load across an A.C power supply.
![Solar Cell Construction](data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSI0MDAiIGhlaWdodD0iMjAwIiB2aWV3Qm94PSIwIDAgNDAwIDIwMCI+PHJlY3Qgd2lkdGg9IjEwMCUiIGhlaWdodD0iMTAwJSIgc3R5bGU9ImZpbGw6I2NmZDRkYjtmaWxsLW9wYWNpdHk6IDAuMTsiLz48L3N2Zz4=)
It is a device which converts the light energy into electrical energy. When light is allowed to fall on this cell, the cell generates a voltage across its terminals.
![SCR DC Motor Control Circuits](data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSI2MTMiIGhlaWdodD0iNDY4IiB2aWV3Qm94PSIwIDAgNjEzIDQ2OCI+PHJlY3Qgd2lkdGg9IjEwMCUiIGhlaWdodD0iMTAwJSIgc3R5bGU9ImZpbGw6I2NmZDRkYjtmaWxsLW9wYWNpdHk6IDAuMTsiLz48L3N2Zz4=)
The speed of DC motor can be control by using SCR in AC circuit as shown in the below figure.
![PLC Block Diagram](data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSI0NTQiIGhlaWdodD0iMTQ5IiB2aWV3Qm94PSIwIDAgNDU0IDE0OSI+PHJlY3Qgd2lkdGg9IjEwMCUiIGhlaWdodD0iMTAwJSIgc3R5bGU9ImZpbGw6I2NmZDRkYjtmaWxsLW9wYWNpdHk6IDAuMTsiLz48L3N2Zz4=)
PLC stands for programmable logic control. It is computer designed to be used in industry. It controls the different process and is programmed
![Characteristics Curve of Common Emitter](data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIzNDQiIGhlaWdodD0iMjc3IiB2aWV3Qm94PSIwIDAgMzQ0IDI3NyI+PHJlY3Qgd2lkdGg9IjEwMCUiIGhlaWdodD0iMTAwJSIgc3R5bGU9ImZpbGw6I2NmZDRkYjtmaWxsLW9wYWNpdHk6IDAuMTsiLz48L3N2Zz4=)
The bipolar power transistor is a three layer NPN or PNP device within the working range, the collector current IC is a function of the base current IB
![Resistive Temperature Transducer](data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIzMTQiIGhlaWdodD0iMjE2IiB2aWV3Qm94PSIwIDAgMzE0IDIxNiI+PHJlY3Qgd2lkdGg9IjEwMCUiIGhlaWdodD0iMTAwJSIgc3R5bGU9ImZpbGw6I2NmZDRkYjtmaWxsLW9wYWNpdHk6IDAuMTsiLz48L3N2Zz4=)
These type of transducers requires an external power supply and therefore output is equal to the variation in a physical parameter such as pressure, temp etc.
![PUT - Programmable Unijunction Transistor Biasing](data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxMzciIGhlaWdodD0iMjAxIiB2aWV3Qm94PSIwIDAgMTM3IDIwMSI+PHJlY3Qgd2lkdGg9IjEwMCUiIGhlaWdodD0iMTAwJSIgc3R5bGU9ImZpbGw6I2NmZDRkYjtmaWxsLW9wYWNpdHk6IDAuMTsiLz48L3N2Zz4=)
The PUT stand for Programmable Unijunction Transistor, it is actually a type of Thyristors and not like the UJT at all.
![Phototransistor Biasing](data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxMDAiIGhlaWdodD0iMjAwIiB2aWV3Qm94PSIwIDAgMTAwIDIwMCI+PHJlY3Qgd2lkdGg9IjEwMCUiIGhlaWdodD0iMTAwJSIgc3R5bGU9ImZpbGw6I2NmZDRkYjtmaWxsLW9wYWNpdHk6IDAuMTsiLz48L3N2Zz4=)
The phototransistor has a light sensitive collector base PN junction. It is exposed to incident light through a lens opening in the transistor package.
![Magnetic Amplifier Flux Waveform](data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIzMjgiIGhlaWdodD0iMzIwIiB2aWV3Qm94PSIwIDAgMzI4IDMyMCI+PHJlY3Qgd2lkdGg9IjEwMCUiIGhlaWdodD0iMTAwJSIgc3R5bGU9ImZpbGw6I2NmZDRkYjtmaWxsLW9wYWNpdHk6IDAuMTsiLz48L3N2Zz4=)
The diagram of magnetic amp or magnetic amplifier is shown in figure below, only silicon diodes are added in series with each winding of the saturated reactor.
![LVDT - Linear Variable Differential Transformer](data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIzMzYiIGhlaWdodD0iMjc3IiB2aWV3Qm94PSIwIDAgMzM2IDI3NyI+PHJlY3Qgd2lkdGg9IjEwMCUiIGhlaWdodD0iMTAwJSIgc3R5bGU9ImZpbGw6I2NmZDRkYjtmaWxsLW9wYWNpdHk6IDAuMTsiLz48L3N2Zz4=)
LVDT is a positive or magnetic displacement transducer; it is commonly used to measure force, weight, pressure and acceleration
![LED Biasing Graph](data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIyMDAiIGhlaWdodD0iMjAwIiB2aWV3Qm94PSIwIDAgMjAwIDIwMCI+PHJlY3Qgd2lkdGg9IjEwMCUiIGhlaWdodD0iMTAwJSIgc3R5bGU9ImZpbGw6I2NmZDRkYjtmaWxsLW9wYWNpdHk6IDAuMTsiLz48L3N2Zz4=)
A type of diode that emits light when there is forward current. The back operation of the LED is as follow.
![LASCR Circuit Symbol, Construction](data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIzMjkiIGhlaWdodD0iMTg5IiB2aWV3Qm94PSIwIDAgMzI5IDE4OSI+PHJlY3Qgd2lkdGg9IjEwMCUiIGhlaWdodD0iMTAwJSIgc3R5bGU9ImZpbGw6I2NmZDRkYjtmaWxsLW9wYWNpdHk6IDAuMTsiLz48L3N2Zz4=)
The LASCR is triggered into the Conduction state when the light falls on it, the operation of LASCR is similar
![Induction Heating](data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIzMDAiIGhlaWdodD0iMTUwIiB2aWV3Qm94PSIwIDAgMzAwIDE1MCI+PHJlY3Qgd2lkdGg9IjEwMCUiIGhlaWdodD0iMTAwJSIgc3R5bGU9ImZpbGw6I2NmZDRkYjtmaWxsLW9wYWNpdHk6IDAuMTsiLz48L3N2Zz4=)
Induction heating is the process in which heat is produced inside a conducting material (magnetic & non-magnetic), according to the
![IGBT Construction Symbol](data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSI2NzAiIGhlaWdodD0iODcwIiB2aWV3Qm94PSIwIDAgNjcwIDg3MCI+PHJlY3Qgd2lkdGg9IjEwMCUiIGhlaWdodD0iMTAwJSIgc3R5bGU9ImZpbGw6I2NmZDRkYjtmaWxsLW9wYWNpdHk6IDAuMTsiLz48L3N2Zz4=)
The insulated gate bipolar transistor (IGBT) is a device which combines the fast acting features and high power capability
![Block Diagram of Digital GlucoMeter](data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSI1NDAiIGhlaWdodD0iMjAzIiB2aWV3Qm94PSIwIDAgNTQwIDIwMyI+PHJlY3Qgd2lkdGg9IjEwMCUiIGhlaWdodD0iMTAwJSIgc3R5bGU9ImZpbGw6I2NmZDRkYjtmaWxsLW9wYWNpdHk6IDAuMTsiLz48L3N2Zz4=)
Glucometer stands for Glucose meter. This instrument is used to check the % value of sugar in the blood of a human body.