1. Robotics Academy
Electronics

2. Introduction to electronics
Resistors
Capacitors
Semiconductors (Diodes, LED, Transistors, IC’s )
LDR
Photo(cell, transistor, diode)
Regulators
Measuring instrument (AVO)

3. Resistors
A resistor is an electrical component that limits or regulates the flow of electrical current in an electronic circuit. Resistors can also be used to provide a specific voltage for an active device such as a transistor.
How to know value of resistor ?!
From the known table of colours.

5. Variable resistors (pot)

6. Capacitors
A capacitor is an electronic component that stores energy in the form of an electrostatic field.
Used for:
Smoothing and filtering
Storing energy

7. Symbols
Unpolarized
polarized
variable

8. Semiconductors
Diodes

9. Transistors
Use as amplifier and switch.

10. Some forms of it

11. Integrated circuits (IC’s)

12. LED’S

13. LDR
LDRs or Light Dependent Resistors are very useful especially in light/dark sensor circuits. Normally the resistance of an LDR is very high, sometimes as high as ohms, but when they are illuminated with light resistance drops dramatically.

14. Solar cell

15. Phototransistor & IR

16. Photodiode & IR

17. Schematic of them

18. IR Receiver & IR

19. Regulators
A dc power supply is an essential component in any electronic system .
Constant voltage regulator 780x , 790x.
Variable voltage regulator (lm317,lm117,lm318,lm150,lm138).

20. Schematics
For constant voltage regulators:

21. Examples of variable regulators (lm317,lm117)

22. MultiMeter (AVO)

23. Thank you

24. Introduced by Eng. Mustafa Ahmed Hemdan.
Chairman of Robotics &Automation Chapter
Communications & Electronics department.
Our blog :
Our group on facebook :
Robotics & Automation Chapter