Partial build of this split rail PSU. Outputs are +12V, -12V, +5V, -5V and 3.3V
Links:
Big Clive's DANGEROUS 100W LED EXPLODES! https://youtu.be/nXkOxP5hka4
Adam Welch's Dual PSU Kit Build https://youtu.be/3Y-XRxBzTUU
Banggood Original Hiland DIY USB Boost Single Turn Dual Power Module Linear Regulators Multiple Output Power Kit http://bit.ly/2k2D2Hg
http://www.xlsemi.com/datasheet/XL6008%20datasheet.pdf
http://www.analog.com/media/en/technical-documentation/application-notes/AN-1106.pdf