robotics academy
DESCRIPTION
Robotics Academy. Electronics. Introduction to electronics. Resistors Capacitors Semiconductors (Diodes, LED, Transistors, IC’s ) LDR Photo(cell, transistor, diode) Regulators Measuring instrument (AVO). Resistors. - PowerPoint PPT PresentationTRANSCRIPT
Robotics AcademyElectronics
Introduction to electronics• Resistors• Capacitors• Semiconductors (Diodes, LED,
Transistors, IC’s )• LDR• Photo(cell, transistor, diode)• Regulators• Measuring instrument (AVO)
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.
Variable resistors (pot)
Capacitors• A capacitor is an electronic component that stores
energy in the form of an electrostatic field.
Used for:• Smoothing and filtering• Storing energy
Symbols
• Unpolarized
• polarized
• variable
Semiconductors
•Diodes
Transistors• Use as amplifier and switch.
Some forms of it
Integrated circuits (IC’s)
LED’S
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 1000 000 ohms, but when they are illuminated with light resistance drops dramatically.
Solar cell
Phototransistor & IR
Photodiode & IR
Schematic of them
IR Receiver & IR
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).
Schematics• For constant voltage regulators:
Examples of variable regulators (lm317,lm117)
MultiMeter (AVO)
Thank you
Introduced by• Eng. Mustafa Ahmed Hemdan.• Chairman of Robotics &Automation Chapter• Communications & Electronics department.• E-mail: [email protected]
• Our blog : • http://rastsc.wordpress.com• Our group on facebook :• Robotics & Automation Chapter