Elliott Sound Products Project 39 - Power Transformer Soft Start

The circuit for the soft start switch is as shown in Figure 6 of the project page - it is quite different from the previous versions. It is simple and reliable, and the relays and power resistors mount on the board.

All components except the transformer and mains switch fit onto the PCB. The second small board holds the 5W power resistors, and mounts vertically of the main board to conserve space (PCB pins are highly recommended).

Order CodeP39
Size (mm)70 x 32  28 x 32