The 3V-15V to 5V voltage regulator is a compact and efficient electronic component designed to step down input voltages ranging from 3V to 15V to a stable 5V output. This regulator is widely used in powering microcontrollers, sensors, and other electronic devices that require a consistent 5V supply. Its small size and high efficiency make it ideal for battery-powered projects, portable devices, and embedded systems.
This circuit converts a 38.5V battery output to multiple lower voltage levels using a series of DC-DC converters and a power module. It includes an emergency stop switch for safety and distributes power to various components such as a relay module, USB ports, and a bus servo adaptor.
Open Project in Cirkit Designer
This circuit is a 12V to 5V regulated power supply with an LED indicator. It uses a 5408 diode for reverse polarity protection, an LM340T5 7805 voltage regulator to step down the voltage to 5V, and a push switch to control the LED indicator. The circuit also includes capacitors for filtering and a resistor to limit the current through the LED.
Open Project in Cirkit Designer
This circuit is a battery management and power supply system that uses three 3.7V batteries connected to a 3S 10A Li-ion 18650 Charger Protection Board Module for balanced charging and protection. The system includes a TP4056 Battery Charging Protection Module for additional charging safety, a Step Up Boost Power Converter to regulate and boost the voltage, and a USB regulator to provide a stable 5V output, controlled by a push switch.
Open Project in Cirkit Designer
This circuit converts AC power to DC using a bridge rectifier and regulates the voltage to 5V with a 7805 voltage regulator. It powers a USB port and indicates power status with an LED, while also providing a charging interface through a multi-charging cable.
Open Project in Cirkit DesignerBelow are the key technical details of the 3V-15V to 5V voltage regulator:
| Parameter | Value |
|---|---|
| Input Voltage Range | 3V to 15V |
| Output Voltage | 5V ± 0.1V |
| Maximum Output Current | 1A (typical), 1.5A (peak) |
| Efficiency | Up to 92% |
| Operating Temperature | -40°C to +85°C |
| Dimensions | Varies by model (e.g., 22mm x 17mm) |
The voltage regulator typically has three pins. Below is the pinout description:
| Pin | Name | Description |
|---|---|---|
| 1 | VIN | Input voltage pin (connect to 3V-15V power source). |
| 2 | GND | Ground pin (connect to the ground of the circuit). |
| 3 | VOUT | Regulated 5V output pin (connect to the load). |
Connect the Input Voltage (VIN):
Attach the VIN pin to a power source with a voltage between 3V and 15V. Ensure the input voltage is within this range to avoid damaging the regulator.
Connect the Ground (GND):
Connect the GND pin to the ground of your circuit. This is essential for proper operation.
Connect the Output Voltage (VOUT):
Attach the VOUT pin to the device or circuit requiring a 5V power supply. Ensure the load does not exceed the maximum output current rating.
Add Capacitors (Optional but Recommended):
The 3V-15V to 5V regulator can be used to power an Arduino UNO from a 9V battery. Below is an example circuit and Arduino code to blink an LED:
// Simple LED blink example for Arduino UNO
// Connect an LED to pin 13 with a 220Ω resistor in series.
void setup() {
pinMode(13, OUTPUT); // Set pin 13 as an output pin
}
void loop() {
digitalWrite(13, HIGH); // Turn the LED on
delay(1000); // Wait for 1 second
digitalWrite(13, LOW); // Turn the LED off
delay(1000); // Wait for 1 second
}
No Output Voltage:
Overheating:
Fluctuating Output Voltage:
Regulator Not Working with a Battery:
Q: Can I use this regulator to power a Raspberry Pi?
A: No, most Raspberry Pi models require more than 1A of current, which exceeds the typical output current of this regulator.
Q: Do I need to use capacitors with this regulator?
A: While not mandatory, adding capacitors improves stability and reduces voltage ripple, especially in noisy environments.
Q: Can I use this regulator with a 12V car battery?
A: Yes, as long as the car battery voltage remains within the 3V-15V range. However, ensure the load does not exceed the regulator's current rating.
Q: What happens if I exceed the input voltage range?
A: Exceeding the input voltage range can permanently damage the regulator. Always stay within the specified range.