WPA linear power supply pcbs are brilliantly designed to allow for quick and slick build of power supplies for DIYers, prototypers and small production runs. The pcbs can be fitted with standard or encapsulated toroidal transformers . Floating outputs allow for connection as positive or negative supplies. Use of TO-220 adj. Regulators allow for up to 1.5 amp output and regulated voltages up to 57vdc! (Actually, higher voltages are possible - see regulator data sheets) Quality and speed of build are unsurpassed!