Variable 3 - 24 Volt / 3 Amp Power Supply circuit
#voltage regulator
#adjustable power supply
#2N3055
#current limiting
#op-amp
#heat sink
#3 amp
#25 volt
#regulated power supply
#transistor
Description: This regulated power supply can be adjusted from 3 to 25 volts and is current limited to 2 amps as shown, but may be increased to 3 amps or more by selecting a smaller current sense resistor (0.3 ohm). The 2N3055 and 2N3053 transistors should be mounted on suitable heat sinks, and the current sense resistor should be rated at 3 watts or more. Voltage regulation is controlled by 1/2 of a 1558 or 1458 op-amp.
This regulated power supply circuit is designed to provide a variable output voltage ranging from 3 to 25 volts while maintaining a current limit of 2 amps. The design allows for an increase in the current limit to 3 amps or higher by using a smaller current sense resistor, specifically a 0.3-ohm resistor. The choice of the 2N3055 and 2N3053 power transistors is critical, as these components are capable of handling the necessary power levels. It is essential to mount these transistors on appropriately sized heat sinks to prevent overheating during operation, ensuring reliable performance and longevity of the components.
The voltage regulation in this circuit is achieved through the use of an operational amplifier, specifically utilizing half of a 1558 or 1458 dual op-amp IC. This op-amp configuration provides feedback control, allowing for precise voltage adjustments and stability across the specified output range. The feedback loop is essential for maintaining the desired output voltage despite variations in load current or input voltage.
In addition to the main components, careful consideration should be given to the selection of the current sense resistor, which must have a power rating of at least 3 watts. This ensures that the resistor can handle the power dissipation without failure during operation. Proper layout and wiring practices should be followed to minimize noise and interference, which can affect the accuracy of the voltage regulation.
Overall, this power supply circuit is versatile and suitable for a wide range of applications, including powering electronic devices, testing circuits, and providing a stable voltage source for various projects.This regulated power supply can be adjusted from 3 to 25 volts and is current limited to 2 amps as shown, but may be increased to 3 amps or more by selecting a smaller current sense resistor (0.3 ohm). The 2N3055 and 2N3053 transistors should be mounted on suitable heat sinks and the current sense resistor should be rated at 3 watts or more.
Voltage regulation is controlled by 1/2 of a 1558 or 1458 op-amp..
This regulated power supply circuit is designed to provide a variable output voltage ranging from 3 to 25 volts while maintaining a current limit of 2 amps. The design allows for an increase in the current limit to 3 amps or higher by using a smaller current sense resistor, specifically a 0.3-ohm resistor. The choice of the 2N3055 and 2N3053 power transistors is critical, as these components are capable of handling the necessary power levels. It is essential to mount these transistors on appropriately sized heat sinks to prevent overheating during operation, ensuring reliable performance and longevity of the components.
The voltage regulation in this circuit is achieved through the use of an operational amplifier, specifically utilizing half of a 1558 or 1458 dual op-amp IC. This op-amp configuration provides feedback control, allowing for precise voltage adjustments and stability across the specified output range. The feedback loop is essential for maintaining the desired output voltage despite variations in load current or input voltage.
In addition to the main components, careful consideration should be given to the selection of the current sense resistor, which must have a power rating of at least 3 watts. This ensures that the resistor can handle the power dissipation without failure during operation. Proper layout and wiring practices should be followed to minimize noise and interference, which can affect the accuracy of the voltage regulation.
Overall, this power supply circuit is versatile and suitable for a wide range of applications, including powering electronic devices, testing circuits, and providing a stable voltage source for various projects.This regulated power supply can be adjusted from 3 to 25 volts and is current limited to 2 amps as shown, but may be increased to 3 amps or more by selecting a smaller current sense resistor (0.3 ohm). The 2N3055 and 2N3053 transistors should be mounted on suitable heat sinks and the current sense resistor should be rated at 3 watts or more.
Voltage regulation is controlled by 1/2 of a 1558 or 1458 op-amp..
Adjustable 0-30V Power Supply
The first essential component for any workshop or lab is a power supply. When experimenting with various electronic circuit designs, having a flexible and adjustable power supply simplifies the process. Presented here is a design for an adjustable power supply...
TRANSISTORIZED AM RADIO
The schematic illustrates a standard AM radio circuit utilizing NPN transistors. This generic circuit does not provide specific values for all components, serving instead as a reference point for experimenters to begin their projects.
The schematic of a typical transistor AM...
Positive Pulse Pulse Stretcher
A simple pulse stretcher built with two sections of an operational amplifier uses a voltage follower U1A to drive D1 and C2. C2 charges to the peak value of the pulse voltage. Resistors R3 and R4 determine the discharge time...
Transistor time relay circuit
This circuit consists of five transistor time relay circuits designed for time relay exchange. It utilizes two different power supplies, maintaining the same circuit configuration. The delay time can be adjusted by modifying a potentiometer. The parameters for the time...
Water Activated Relay
In this circuit, two transistors are configured as a high-gain compound pair. Transistor T1 is likely a 2N2222A, while T2 is identified as a BC108. The current gain is calculated as the product of the beta values of each transistor,...
More op-amp circuits
The circuits examined thus far rely on linear feedback for their operation. The magnitude of the signal returned to the negative input is always strictly proportional to the output voltage. Consequently, within the limits defined by the operational amplifier (op-amp),...
Light sensor using Op Amp
A light-based sensor utilizing an LDR (Light Dependent Resistor) and an operational amplifier (Op Amp). This circuit can be employed for applications such as line followers. The operation of the Op Amp is foundational to this design. It features two...
Op-Amp Circuit: Difference Amplifier
This circuit is a difference amplifier. It functions as an inverting amplifier that enables the subtraction of two voltages, effectively performing a summation.
The difference amplifier is a fundamental circuit configuration in analog electronics, primarily used for amplifying the difference between...
Add-on triggered sweep
The circuit's input operational amplifier triggers the timer, setting its flip-flop and cutting off its discharge transistor so that capacitor C can charge. When the capacitor voltage reaches the timer's control voltage (0.3Vcc), the flip-flop resets, and the transistor conducts,...