Package including: 
LM317 / LM337 +/-1.5V~37V Adjustable Dual Voltage Regulator Power Supply PCB (only the Board )

Plate selection of high-quality 1.6mm double-sided glass fiber board, double-sided line, Shenjin process, board size 7.5cm * 7.5cm. Two filter capacitor pin installation using "lead feet / hard feet" coexistence design, capacitor diameter from 1.6cm-2.2cm can be installed within the expansion of more filter capacitors. Layout using a classic point of the ground, both sides of the symmetrical layout of components, nice.

Input AC voltage requirements: 25V below -0-25V below

Output DC voltage range: + - 1.5V to + -37V (maximum not over 37V DC, beyond LM317 / LM337V load will burn components.)

Install the required bill of materials:

(1800uf-3300uf) / 35V capacitor 2 only
Fast Diode FR207 4 only
  CBB 104 capacitors 6 only
4.7K resistance 1 only
1K resistance 2 only
200R resistance 2 only
33K resistance 2 only
3mm LED indicator 1 only
LM317 regulator tube only 1
LM337 regulator tube only 1
LF353 dual op amp 1
8 feet transport seat 1 only
3296 fine-tuning 2 only
10uf / 35V capacitor 4 only
120uf / 50V capacitor 2 only
33p monolithic capacitor 2 only
PCB wiring 3 terminal 2 only
Radiator 2 only
2 screws