The buck converter
Input Voltage Range: DC 3V to 40V (The input voltage must be more than 1.5V higher than the output voltage. It cannot be boosted).
Output Voltage Range: DC 1.5V to 35V continuously adjustable voltage, high efficiency output current is 3A. All solid capacitors using SANYO; 36u thick circuit boards; High-Q inductors with high power output LED indicator. The DC to DC converter output with high power conversion efficiency up to 92%. Measured 12V input, 5V output current, 1A load regulation rate is less than 1%. 20 Pack LM2596 DC to DC High Efficiency Voltage Regulator 3.2 -35V to 1.25 -30V Buck Converter DIY Power Supply Step-Down Module for DIY