Waveform　generators　employed　in　college　laboratories　are　often　purchased　instruments　with　ultra　precision,　which　may　cause　unnecessary　expenditure　since　the　prices　are　often　high　whilst　some　functionalities　are　not　required.　By　analyzing　the　principle　of　existing　products,　a　simple　waveform　generator　based　on　DDS　(direct　digital　synthesis)　technology　has　been　developed　using　AT89S52　single　chip　microcomputer　combined　with　DDS　chip　AD9851,　which　can　produce　square　wave,　sine　wave　and　triangular　wave　signals.　While　meeting　the　requirements　of　college　laboratories,　surplus　functionalities　were　avoided　to　limit　the　cost.　In　addition　to　advantages　such　as　small　size,　simple　structure　and　easy　operation,　experiments　showed　that　the　generated　waveforms　are　of　high　precision.　©　2016,　UK　Simulation　Society.　All　rights　reserved.