A resistor the flow of electricity through a circuits
Resistors have a set values..
since voltage, current and resistance are related through Ohm’s law, resistance are a good way to control voltage and current in your circuit..
Symbol Of Resistance
Resistor. rheostat (variable resistor). Potentiometer
More on resistors.
Resistor Color Codes.
1st band = 1st number
2nd band = 2nd number
3rd band = #of zeros/multiplier
4th band = tolerance
Knowning Your units is important !
• Kilo and mega common in resistor.
• Milli micro nano & pico can be use in other components.
K (kilo) = 1000
M (mega) = 1,000,000
M(Milli) = 1/1,000
u (micro) = 1/1,000,000
n (nano) = 1/1,000,000,000 (one trillionth)
p (pico) = 1/1,000,000,000,000 (one quadrillionth)
• A capacitor Store Electrical Energy .
This pool of electron is available for Electronic Components to use ..
capacitance is measured in farads. Small capacitors usually used Electronics are often measured in microfarads
Symbol Of capacitor
Fixed Capacitor. Polarized capacitor. Variable Capacitor
some capacitors are polarized.
the different length terminal on 1 of the capacitors ..
Polarity of capacitors.
Polarity of capacitors.
• The shortest terminal goes on the negative side .
• stripe is on the negative terminal side of the capacitors..
•. An ideal Diode will have zero resistance in the reverse direction.
• A diode is a one way Valve for pass
A diode has low ( zero) resistance in one direction ,and high( infinity ) resistance in the others direction..
• Diode will protect your Electronics. projects
Diode Circuit Protection
• In a DPDT switch , if polarity is wrong, so the motor will run backwards• In an electronic circuits ,if the polarity is wrong , you can fry your components.A Diode in your system ‘ll help to prevent problems.
Diode have a bar on the cathode (negative) side.
Some Diodes Pic
• light emitting diode (LED) is semiconductor .
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I Hope you find this useful..
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