LM2596S DCDC Adjustable StepDown Power Module with LED Voltmeter
= High-Power Voltage Regulator with Digital Display for DIY Projects =
The LM2596S module integrates a high-efficiency buck converter with a digital LED voltmeter, offering a complete adjustable power supply solution for Arduino, ESP32, and other electronics projects.
AllinOne Solution Combines voltage regulation and realtime monitoring
High Efficiency - Up to 92% conversion with low heat generation
Input voltage must be at least 1.5V higher than the desired output voltage
Switch between Input and Output voltage measurement using the button
Do not exceed 40V input or 3A current rating
= Technical Specifications =
| Parameter | Value |
|---|
| Input Voltage | 4.0V to 40V DC |
| Output Voltage | 1.25V to 37V adjustable |
| Output Current | 3A max (2A continuous) |
| Display Accuracy | ±0.05V |
| Voltmeter Range | 0V to 40V |
| Switching Frequency | 150kHz |
= Key Features =
Builtin LED Voltmeter Real-time voltage display with ±0.05V accuracy
Dual Measurement Onebutton switch between input and output voltage
Memory Function Saves display settings even after poweroff
Protection Circuits - Overheat and short circuit protection
Terminal Blocks - Screw terminals for easy wiring without soldering
== Applications ==
- Arduino and ESP32 power supplies
- Battery charging circuits
- LED lighting systems
- Bench power supply projects
- Automotive voltage regulation
Versatile and Powerful - Replaces multiple separate modules
UserFriendly No external meter needed for adjustment
√ Ready to use with included terminal blocks
√ Compact size for easy integration
√ Saves time and simplifies prototyping
= Connection and Operation Guide =
Terminal connections:
- IN+: 4.0V to 40V positive input
- IN-: Input ground
- OUT+: Positive output (1.25V to 37V)
- OUT-: Output ground
Display operation:
- Right button: Switch between IN/OUT voltage display
- Left button: Turn display on/off
- LED indicator shows which voltage is being measured
Trim potentiometer adjusts output voltage
Use a multimeter to verify output during initial setup
Ensure input voltage exceeds output by 1.5V minimum
Do not exceed 3A current output
= Troubleshooting =
No output:
- Check input voltage is above 4V
- Verify wiring connections
- Avoid short circuits
Display shows wrong voltage:
- Press button to switch between IN/OUT measurement
- Check LED indicator for measurement mode
Overheating:
- Reduce load current below 2A continuous
- Add heatsink for 3A operation
