It is a tool, which can be very useful in a small workshop. It is a switchable symmetrical power supply based on: LINK.
The PCB was made in thermal transfer method and lacquered with Plastic 70 preparation.
Devices such as an operational amplifier tester (see: picture) can be connected to the power supply. Transformer TS40/043. The rest of elements can be found in almost every workshop – so the device is really cheap.
Front panel was made in the following way:
project was made in Word, printed and glued on the panel
all the holes were cut and the template was taken off