3A DC-DC Adjustable Step Down Converter with Voltmeter LM2596 Buck

Specifications; (Please see Notes)
Input Voltage: 4.5-40VDC
Adjustable Output Voltage Range: 1.25-37VDC
Output Current: 3A Max
Digital Display: 3-digit 7 segment LED
Output ON/OFF push button switch.

Important Notes:

For proper operation:

1. Input voltage must always be greater than the input voltage by at least 1.5V. i.e. You can never get an output voltage higher than the input voltage (Vin-1.5V).

2. Similarly, the output current capacity drops with increasing voltage, limited roughly to I=15/V.

3. In addition to 2, Current capacity is likewise limited by the input power supply, e.g. If your power supply can only source 10W, the output current is limited to approx I=10/Vout.