Circuit Symbol / Circuit Schematic Symbols of Electronic Components

Below are circuit symbols of most common electronic components:

• AC Current Circuit Symbol
  

  AC Current Circuit Symbol
• DC Current Circuit Symbol
  

  DC Current Circuit Symbol
• Capacitor Circuit Symbol
  

  Capacitor Circuit Symbol
• Coil Circuit Symbol
  

  Coil Circuit Symbol
• Crystal Circuit Symbol
  

  Crystal Circuit Symbol
• Resistor Circuit Symbol
  

  Resistor Circuit Symbol
• Diode Circuit Symbol
  

  Diode Circuit Symbol
• LED Circuit Symbol
  

  LED Circuit Symbol
• Transistor Circuit Symbol
  

  Transistor Circuit Symbol
• Fuse Circuit Symbol
  

  Fuse Circuit Symbol
• Regulator Circuit Symbol
  

  Regulator Circuit Symbol

Other Electronic Components Symbols

Circuit Symbols of Electronic Components

Circuit Symbol of Resistor – American-style resistor (a), rheostat (variable resistor) (b), and potentiometer (c), IEC-style resistor

Circuit Symbol of Capacitor – Capacitor, Capacitor, polarized; Capacitor, variable

Circuit Symbol of Transistor – NPN transistor, PNP transistor, n-channel junction gate field-effect transistor (JFET), p-channel junction gate field-effect transistor (JFET), Field-effect transistor

Circuit Symbol of Diode – Diode, Zener diode, Tunnel diode, Schottky diode, Light Emitting Diode (LED), Photodiode, Varicap

Circuit Symbol of Vacuum Tube – Vacuum tube diode, Vacuum tube triode, Vacuum tube tetrode, Vacuum tube pentode

Circuit Symbol of Switch – Switch, Single Pole/Single Throw (SPST), Switch, Single Pole/Double Throw (SPDT), Switch, Double Pole/Double Throw (DPDT)

Circuit Symbols – Single cell, multi-cell battery, Inductor, Transformer with center tap, Silicon-controlled rectifier, Fuse, Phone jack

Read More

Small Parts / Electronic Components of Mobile Phone and Their Function

Boost Coil: Its size is little bigger than coil. It is found in black colour and

Mobile Phone Coil

looks like a large button. Its function is to increase current. If this coil gets damaged then it has to be changed.

Coil: It is found in any section of a mobile phone. It is found in many shapes and sizes. Coils are found in 2 colours: (i) Black and white; and (ii) Blue and white. It has binding of copper coil inside. It filters and decreases Current and Voltage.

Capacitor: 3 types of capacitor are found in a mobile cell phone:

1. Non-Electrolytic Capacitor: It is found in any section of a mobile
   

   Mobile Cell Phone Capacitor
   phone. Its height is little more than chip resistance. It can be of gray, yellow or brown in color. It has no Positive (+) or Negative (-) side. It filters DC current.

2. Electrolytic Capacitor: It is found in any section of a mobile phone. Its size is larger than non-electrolytic capacitor. It is found in 2 colors – (i) Orange with brown strip: and (ii) Black with white strip. The side with the strip is Positive (+) and the other side is Negative (-). It filters and stores current.

3. Network Capacitor: It is found in any section of a mobile phone. It is made from 2 or more Non-Electrolytic Capacitors.

Coupler: This electronic component is found in the Network Section of a

Mobile Phone Coupler

mobile phone. It is of either black or white color and has 6 pins bent inside.

Function: It filters network.

Faults: If the coupler is faulty then there will be no network in the mobile phone.

Diode: Diodes are of 4 types:-

1. Rectifier Diode: It is found in black color and converts AC Current to DC Current. It passes current in one direction. It does not pass current in reverse direction.
   

   Mobile Phone Rectifier Diode

2. LED: It is found in white or light yellow color and emits light.
   

   Mobile Phone LED

3. Zener Diode: It is found in charging section. It filters and minimize current and passes forward. It acts as voltage regulator. Zener diode has fixed capacity like 4V, 6V, 8V etc.
   

   Mobile Phone Zener Diode

4. Photo Diode: It is used for Infrared. It captures Infrared Rays.
   

   Mobile Phone Photo Diode

Regulator: This electronic component is found in any section of a mobile phone. It is of black color and has 5 or 6 legs. It filters current and regulates voltage.

Mobile Phone Regulator

Resistance or Resistor: There are 2 types of resistance on the PCB of a

Mobile Phone Resistor

mobile phone:

1. Chip Resistance: It can be found in any section of a mobile phone. It is of black color. In some sets it is also found in blue and green colour. It is the smallest electronic components on the PCB of a mobile phone. It Decreases current and passes forward.

2. Network Resistance: It can be found in any section of a mobile phone. It is made from 2 or more Chip Resistance.

Transistor: This electronic component is found in any section of a mobile phone. It is of black color and it has 3 legs. It does the work of switching.

Mobile Cell Phone Transistor

Read More

Card Level Parts of a Mobile Cell Phone

1. Front Facia or Facial: This is the front cover or housing of any mobile phone. These are of different shapes and sizes depending upon brand and model.
   

   Mobile Phone Front Facia
2. Back Facia or Facial: This is the Back cover or housing of any mobile phone. These are of different shapes and sizes depending upon brand and model.
   

   Mobile Phone Back Facia
3. Internal Facia or Facial: This is the internal skeleton of a mobile phone.
   

   Internal Facia or Skeleton of a Mobile Phone
4. Ringer: This part of component in a mobile phone is also called loudspeaker. It plays loud sound and music in mobile phone.
   

   Mobile Phone Ringer
5. Speaker: This part or component is also called earpiece. It helps to listen to sound during phone call when the loudspeaker or headphone is NOT ON.
   

   Mobile Phone Speaker
6. Microphone: It is also called Mic in short. It transmits sound of the speaker during phone call. It also helps to record sound in a mobile phone. It other words, microphone is a sound input device.
   

   Mobile Phone Microphone
7. Vibrator: It is also called motor. It creates vibration in a cell phone when vibration mode setting is turned ON.
   

   Vibrator of Mobile Phone
8. LED: Light Emitting Diode. These components produce light in a mobile cell phone.
   

   LED of Mobile Phone
9. Charging Connector: It helps to connect the charger to the PCB of a mobile phone to charge or recharge the battery.
   

   Mobile Phone Charging Connector
10. Headphone Connector: It is also called Earphone Connector. It helps to connect the headphone to the mobile phone via jack.
    

    Mobile Phone Headphone Connector
11. Data Cable Connector: It helps to connect the mobile to another device such as a computer, laptop, table etc using a data cable.
    

    Data Cable Connector of Mobile Phone
12. Battery: It supplies power or DC current to the mobile phone.
    

    Battery of Mobile Phone
13. Battery Connector: It connects the battery to the internal circuit tracks of the PCB of a mobile phone.
    

    Mobile Phone Battery Connector
14. SIM Card: Subscriber Identification Module. This is a small rectangular chip with circuit and information of user of the card. A SIM card is necessary to make or receive phone calls with a mobile phone.
    

    SIM Card
15. SIM Card Connector: It connects the SIM card to the Circuit or PCB of a mobile phone.
    

    SIM Connector
16. Memory Card: It is used to store data like document, music, videos etc. These are available in different capacities like 1GB, 2GB, 4GB, 8GB, 16GB, 32 GB etc.
    

    Memory Card
17. Memory Card Connector or MMC Connector: It connects the memory card to the PCB of a mobile phone.
    

    Mobile Phone Memory Card Connector
18. Camera: It is used to capture still images or record videos. These are available in different megapixel.
    

    Camera of Mobile Phone
19. Camera Connector: It connects the camera to the PCB of the mobile phone.
    

    Mobile Phone Camera Connector
20. Keypad Button: It is connected to the keypad carbon to enter numbers to make phone calls and other data.
    

    Mobile Phone Keypad
21. Keypad Carbon: It is present in between keypad button and the PCB. It connects the keypad buttons to the PCB of a mobile phone.
    

    Mobile Phone Keypad Carbon
22. Keypad Connector: It connects the keypad to the PCB of the cell phone.
    

    Mobile Phone Keypad Connector
23. ON / OFF Switch: It helps to switch the mobile phone ON or OFF.
24. Display: It is screen of the mobile phone.
    

    Mobile Phone ON-OFF Switch
25. Display Connector: It connects display of screen to the PCB of a Mobile Phone.
    

    Mobile Phone Display Connector
26. Internal Antenna: It helps to capture network frequency.
    

    Internal Antenna of Mobile Phone
27. PCB: Printed Circuit Boardof the Mobile Phone.
    

    Mobile Phone PCB
28. PDA: Display or Screen of a touch screen mobile phone.
    

    Mobile Phone PDA

Read More