LM317 AC to DC Step-down Regulator

This circuit is made of common 317 rectifier filter voltage regulator circuit, optimized wiring, component symmetrical layout, arranged in a compact, beautiful and generous. Suitable for use with some small current devices.

Specifications:

• PCB board size : 2.7CM times 7.5CM
• Plate thickness : 1.6mm KB Kingboard A grade FR4 sheet

Power supply requirements:

• Input AC voltage : below AC24V
• Output DC voltage range : 1.5V <- (AC times 1.4 times = maximum DC) -> maximum 35V
• Output DC current : up to 1.5A

Instructions for use:

1. This PCB power board is buck regulator circuit board, itself without boosting effect. Such as 18V AC rectification is 25V DC, then its maximum adjustable voltage is 25V.
2. the factory output voltage by default into a positive and negative 5V, the buyer can receive the goods after the need to adjust the voltage, adjust the method to find 3296 fine-tuning components, left twist for buck, right twist for the boost.
3. "AC IN" for the AC input, "+ - OUT" for the DC output, the installation of attention to distinguish between input and output, must not be reversed, will not burn LM317 op amp block.