Note: This is a DIY kit, you need to assemble it, no instruction supply.
Sepecification:
Input voltage: AC 12-17V (No direction)
Output voltage: DC 8-14V (adjustable)
Output current: 500mA
Board size: 4.9 * 3.5cm
Package includes:
1 x PCB board
2 x 9013 transistor
1 x D880 transistor
1 x 15 * 10 * 20mm heatsink
1 x M3 * 6 screws
2 x 3.96-2P pillars
4 x 1N4007 diode
1 x 0.5W 6.8V Zener diode
1 x 1000UF50V electrolytic capacitor
1 x 470UF25V electrolytic capacitor
2 x 10UF25V electrolytic capacitor
5 x 1K resistor
1 x 47K resistor
1 x 1K blue and white potentiometer
Test, for reference only: