Ea elektro automatik 150 300w dual output variable dc power supplies ea elektro automatik 35 320 149 this 300w dual output variable dc power supply with 4 outputs from ea elektro automatik is a universal device which offers the ideal solution for schools laboratories and workshops courtesy of the adjustable voltage and current outputs which can be tapped in parallel via a rectifier and a filter that can be switched off the values of the adjustable outputs are displayed via large 3 digit le