Bro! It takes some time for the voltage to change due to the charge on the capacitor used to stabilize the output. If you connected the output with a load and checked the voltage, this delay would never noticed.
aiya dan okata 3A kiuwa neda .. max ekada 3A wenne . api ita adu ampiar ekak dunnoth wadi wenwada . api hithamu transpomar ekakin ena ac carent eka dc kara kiyala 24v 500ma , mekata input karama mata oni voltage eka hada ganna puluwan neh ,volt eka adu weddi auto ma ampiar ekath adu wenwada .