Power supply circuit consists of a few sections 04 to 0 30v power supply based on solid TL081 op amp circuit 2N3055 power transistor quite popular and a classic by many people applied. LCD display on the floor (AVT2857)... Electronics Projects, Adjustable Power Supply Circuit 0 30V LCD "atmega8 projects, avr project, microcontroller projects, " Date 2019/08/03