May 4, 2025

12V Dual Power Supply Circuit Diagram | 7812 Voltage Regulator Circuit

7812 Voltage Regulator Circuit

The 7812 is a three-terminal linear voltage regulator integrated circuit (IC) that provides a fixed regulated output voltage of 12V. It is commonly used in power supplies and voltage regulation applications, where the input voltage can fluctuate and a stable output voltage is required. The 7812 operates on a wide input voltage range, typically 10V to 35V, and can provide a maximum output current of 1A.

The 7812 IC is a positive voltage regulator which means that it generates a positive voltage with respect to the common ground. 12 volts dc supply is maintained by using regulator 7812 IC, if the supply voltage exceeds 12 volts then regulator IC 7812 blocks excessive voltage. This power supply circuit is used for pure dc voltage requirement devices like audio systems low voltage ripples dc voltage waveform found.

 

 



12V Dual Power Supply Circuit Diagram

 

12V power supply circuits with output voltages around 12V, LM7912 is a negative voltage regulator used for regulating negative voltages. These are specially designed to regulate negative voltages. These are designed with the lowest noise and highest power supply rejection ratio. The output voltage of LM7912 is -12V

Voltage Regulator

The voltage regulator is an important part of electronics. It allows devices to adjust the voltage level so that it’s consistent, regardless of how much power is being drawn. This prevents devices from exploding and helps make circuits run more efficiently. The secondary function of voltage regulation is to prevent noise — excess voltage — from entering a circuit.

7812 IC Pinout

 



 

7812 IC Datasheet Pdf Download

if the above link is not open please check the below link

https://drive.google.com/file/d/1MmGcnttO4bs5ebFQHO-BWjHuYBaH5WiY/view?usp=sharing

7812 IC Price

If you want to purchase this 7812 IC please refer to the following website


How to Make AC to DC (12V-0-12V) Dual Power Supply Circuit using Transformer

 

6283 IC Pinout | CD6283 Stereo Audio Amplifier Circuit Diagram

CD6283 Stereo Audio Amplifier Circuit

If you are looking for a simple and low-cost way to build a stereo audio amplifier, you might be interested in the 6283 IC pinout. The 6283 IC is a dual-channel audio power amplifier with built-in thermal shutdown protection and low popping noise at power on. It can deliver up to 4.6 W per channel at 12 V supply voltage and has a voltage gain of 45 dB. In this article, we will explain the 6283 IC pinout, its features, and how to use it in a circuit diagram.

What is the 6283 IC?

The 6283 IC is an audio power IC with built-in two channels developed for portable audio devices. It comes in a single inline package (SIP) with 12 pins. It has a low quiescent current of 7 mA and can operate with a supply voltage range of 6 V to 15 V. It also has a built-in thermal shutdown protection circuit that prevents the IC from overheating and damaging itself.

The 6283 IC has two input pins, two output pins, two feedback pins, two bypass pins, two ground pins, one Vcc pin, and one mute pin. The input pins are used to connect the audio signal sources, such as MP3 players, CD/DVD players, or radio tape players. The output pins are used to connect the speakers or headphones. The feedback pins are used to set the voltage gain of the amplifier by connecting resistors between them and the output pins. The bypass pins are used to connect capacitors to improve the stability and frequency response of the amplifier. The ground pins are used to connect the common ground of the circuit. The Vcc pin is used to connect the positive supply voltage of the circuit. The mute pin is used to control the output signal level by connecting a switch or a transistor between it and the ground.

6283 IC pinout is shown in the following table:

Pin NoPin NameFunction
1MUTEMute control pin
2OUT1Output pin for channel 1
3GND1Ground pin for channel 1
4BYP1Bypass pin for channel 1
5IN1Input pin for channel 1
6VccSupply voltage pin
7IN2Input pin for channel 2
8BYP2Bypass pin for channel 2
9GND2Ground pin for channel 2
10OUT2Output pin for channel 2
11FB2Feedback pin for channel 2
12FB1Feedback pin for channel 1

How to use the 6283 IC in a circuit diagram?

To use the 6283 IC in a circuit diagram, you need to connect some external components such as resistors, capacitors, speakers, and a power supply. The following circuit diagram shows an example of how to use the 6283 IC as a stereo audio amplifier:

6283 IC stereo audio amplifier Circuit diagram


 

IC 6283 Pinout



In this circuit diagram, the following components are used:

  • R1 and R2 are feedback resistors that set the voltage gain of the amplifier. They are chosen to be 560 ohms, which gives a voltage gain of about 45 dB.
  • C1 and C2 are input coupling capacitors that block any DC component from the audio signal sources. They are chosen to be 1 uF, which gives a cutoff frequency of about 160 Hz.
  • C3 and C4 are bypass capacitors that improve the stability and frequency response of the amplifier. They are chosen to be 100 uF, which gives a cutoff frequency of about 16 Hz.
  • C5 is a power supply decoupling capacitor that reduces any ripple or noise from the supply voltage. It is chosen to be 470 uF, which gives a cutoff frequency of about 0.7 Hz.
  • SP1 and SP2 are speakers or headphones that reproduce the amplified audio signals. They are chosen to be 8 ohms, which gives an output power of about 4.6 W per channel at 12 V supply voltage.
  • SW1 is a mute switch that controls the output signal level by connecting or disconnecting the mute pin to the ground. When SW1 is closed, the output signal is muted. When SW1 is open, the output signal is normal.
  • Vcc is the supply voltage source that powers the circuit. It can be any DC source between 6 V and 15 V. In this example, it is chosen to be 12 V.

6283 IC Pinout shown above table.

What are the advantages of the 6283 IC?

The 6283 IC has some advantages and disadvantages as an audio amplifier.

Some of the advantages are:

  • It is simple and easy to use, requiring only a few external components.
  • It has a low quiescent current, which saves battery power and extends the operating time of portable devices.
  • It has built-in thermal shutdown protection, which prevents the IC from overheating and damaging itself.
  • It has a low popping noise at power, which improves the sound quality and user experience.

What are the disadvantages of the 6283 IC?

Some of the disadvantages are:

  • It has a limited output power, which may not be enough for some high-end or loud applications.
  • It has a limited bandwidth, which may not reproduce some high-frequency or low-frequency sounds well.
  • It has a high distortion, which may affect the sound fidelity and clarity.

Conclusion

The 6283 IC pinout is useful information for anyone who wants to build a simple and low-cost stereo audio amplifier. The 6283 IC is a dual-channel audio power amplifier with built-in thermal shutdown protection and low popping noise at power on. It can deliver up to 4.6 W per channel at 12 V supply voltage and has a voltage gain of 45 dB. It can be used with various audio signal sources such as MP3 players, CD/DVD players, or radio tape players. It can also be used with various speakers or headphones to reproduce the amplified audio signals. However, it also has some limitations such as limited output power, limited bandwidth, and high distortion. Therefore, it may not be suitable for some high-end or loud applications.

We hope this article has helped you understand the 6283 IC pinout and how to use it in a circuit diagram. If you have any questions or comments, please feel free to leave them below. Thank you for reading!

TDA7388 4 x 45 W Audio Amplifier

TDA7388 Amplifier

The TDA7388 is a class AB radio amplifier specifically designed for car radio applications. It offers several features that make it suitable for automotive audio systems. Here are the key specifications and pinout details:

  1. Specifications:
    • Output Power: 4 x 45 W (maximum) at 4 Ω and 4 x 26 W at 14.4 V, 1 kHz, 10%
    • Low Output Noise
    • Standby Function
    • Mute Function
    • Low Distortion
    • Operating Supply Voltage (VS): 18 V (DC)
    • Peak Supply Voltage (VPK): 50 V (for 50 ms)
    • Quiescent Current (IQ): 190 mA (typical)
    • Output Power (PO): 26 W (typical) at VS = 14.4 V (THD = 10%)
    • Maximum Power Output (Pmax): 41 W (at VS = 14.4 V), 45 W (at VS = 15.2 V)
    • Total Harmonic Distortion (THD): 0.04% (at PO = 4 W)
  2. Pinout Configuration:
    • 1: TAB (Connect to ground)
    • 2: P-GND2 (Power ground of Channel 2)
    • 3: OUT2- (Inverting Output of Channel 2)
    • 4: ST-BY (Stand-by)
    • 5: OUT2+ (Non-Inverting Output of Channel 2)
    • 6: VCC (Supply Voltage)
    • 7: OUT1- (Inverting Output of Channel 1)
    • 8: P-GND1 (Power ground of Channel 1)
    • 9: OUT1+ (Non-Inverting Output of Channel 1)
    • 10: SVR (Supply Voltage Rejection)
    • … (Continues for all pins)
  3. Application Circuit:
    • The TDA7388 is a quad bridge amplifier, meaning it has four output channels where you can connect four speakers.
    • The figure below illustrates the standard application circuit for the TDA7388: !TDA7388 Application Circuit
    • Key components in the circuit:
      • SVR Capacitor: Used for ripple rejection and governs turn ON/OFF sequence. Minimum recommended value: 10 μF.
      • Mute Mode and Standby Mode: These modes can be directly controlled by connecting to the supply voltage (Vs).
      • RC Cells: Used to smooth transitions and prevent audio noise.
      • Muting and Standby Pins: Employ conventional/low-power transistors if true CMOS ports and microprocessors are absent.