Jay_Diddy_B, a contributor on the EEVblog Forum built a great looking DIY Dynamic Electronic Load. He used LT Spice to model the design before it was built, the test result look quite good. Nice thing about the design is that there are no specialty parts, chances are you have most of the things on hand to get building right now.
“The dynamic load steps the load current so that the transient response of the power supply being tested can be observed.
Features:
0-5A maximum continuous current
0-5A pulsed current at 330Hz”
