kənvˈɜːʒən fɹʌm wˈʌn dˌiːsˈiː vˈoʊltɪdʒ tʊ ɐnˈʌðɚ ɹᵻkwˈaɪɚz ᵻlɛktɹˈɑːnɪk sˈɜːkɪtɹi ɪlˌɛktɹoʊmᵻkˈænɪkəl ɪkwˈɪpmənt wʌz ɹᵻkwˈaɪɚd bᵻfˌoːɹ ðə dɪvˈɛləpmənt ʌv sˌɛmɪkəndˈʌktɚɹ ᵻlɛktɹˈɑːnɪks, lˈaɪk ɐ dˌiːsˈiːdˌiːsˈiː kənvˈɜːɾɚ.
Conversion from one DC voltage to another requires electronic circuitry (electromechanical equipment was required before the development of semiconductor electronics), like a DC-DC converter.