Design with AMS1117-3.3V Module in Cirkit DesignerThe AMS1117-3.3V module is a voltage regulator designed to provide a stable 3.3V output from a higher input voltage, typically ranging from 4.5V to 12V. It is widely used in power supply circuits for microcontrollers, sensors, and other electronic devices that require a reliable 3.3V power source. The module is compact, easy to use, and features built-in thermal and short-circuit protection, making it a popular choice for hobbyists and professionals alike.
This circuit features an ESP32 microcontroller powered by a 3.3V AMS1117 voltage regulator. The power is supplied through a 2.1mm DC barrel jack, which provides the input voltage to the AMS1117, and the regulated 3.3V output is connected to the ESP32's VIN pin. The ground connections are shared among the ESP32 and the voltage regulator.
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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.
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This circuit is a power management and control system that uses a 12V power supply and a 18650 Li-ion battery pack to provide a stable 5V output through a step-down buck converter. It includes an Arduino UNO, an ESP-8266 controller, a DS1307 RTC module, and a 20x4 I2C LCD display for monitoring and control purposes. The ULN2003A breakout board is used for driving higher current loads.
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This circuit features a LilyGo-SIM7000G module for cellular communication and GPS functionality, interfaced with an RTC DS3231 for real-time clock capabilities. It includes voltage sensing through two voltage sensor modules, and uses an 8-channel opto-coupler for isolating different parts of the circuit. Power management is handled by a buck converter connected to a DC power source and batteries, with a fuse for protection and a rocker switch for on/off control. Additionally, there's an LED for indication purposes.
Open Project in Cirkit DesignerThe AMS1117-3.3V module is based on the AMS1117 linear voltage regulator IC. Below are its key technical details:
| Parameter | Value |
|---|---|
| Input Voltage Range | 4.5V to 12V |
| Output Voltage | 3.3V ± 1% |
| Maximum Output Current | 800mA |
| Dropout Voltage | 1.1V (at full load) |
| Quiescent Current | 5mA (typical) |
| Operating Temperature | -40°C to +125°C |
| Protection Features | Thermal shutdown, short-circuit protection |
The AMS1117-3.3V module typically has three pins:
| Pin | Name | Description |
|---|---|---|
| 1 | VIN | Input voltage (4.5V to 12V) |
| 2 | GND | Ground (common ground for input and output) |
| 3 | VOUT | Regulated 3.3V output |
Connect the Input Voltage (VIN):
Connect the Ground (GND):
Connect the Output Voltage (VOUT):
Add Decoupling Capacitors (Recommended):
The AMS1117-3.3V module can be used to power 3.3V devices in conjunction with an Arduino UNO. Below is an example of how to connect the module to an ESP8266 Wi-Fi module:
// Example code to communicate with an ESP8266 module powered by AMS1117-3.3V
#include <SoftwareSerial.h>
// Define RX and TX pins for SoftwareSerial
SoftwareSerial esp8266(2, 3); // RX = Pin 2, TX = Pin 3
void setup() {
// Initialize serial communication with the ESP8266
Serial.begin(9600); // Serial monitor
esp8266.begin(115200); // ESP8266 baud rate
// Send a test command to the ESP8266
esp8266.println("AT"); // Send AT command to check communication
}
void loop() {
// Check if the ESP8266 has sent any data
if (esp8266.available()) {
// Read and print data from the ESP8266
while (esp8266.available()) {
char c = esp8266.read();
Serial.print(c);
}
}
// Check if the user has sent any data from the Serial Monitor
if (Serial.available()) {
// Read and send data to the ESP8266
while (Serial.available()) {
char c = Serial.read();
esp8266.print(c);
}
}
}
No Output Voltage:
Overheating:
Unstable Output Voltage:
Module Not Working:
Q: Can I use the AMS1117-3.3V module to power a 5V device?
A: No, the AMS1117-3.3V module is designed to output a fixed 3.3V. For 5V devices, use the AMS1117-5.0V module or a different regulator.
Q: Is the AMS1117-3.3V module suitable for battery-powered projects?
A: It depends. The AMS1117 is a linear regulator, which is less efficient than switching regulators. For battery-powered projects, consider using a DC-DC buck converter for better efficiency.
Q: Can I connect the AMS1117-3.3V module directly to a 12V power supply?
A: Yes, but ensure the current draw is low to prevent overheating. Use a heatsink if necessary.