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A DDS function generator using an ATmega16

I can still remember the piece of rectangular box with lots of buttons labeled 1kHz, 10kHz, 100kHz, 1MHz and everything else in between. Oh it also has a knob connected to a dial dividing a sector into a hundred parts with a series of 7 segments changing dial every time a button is fired– just like old school radio we see at startrek. We commonly call it the function generator and its usually used to inject square waves into your circuits – what for? Mostly for clocking. Here’s a new implementation of the AVR DDS function generator 2.0 (scienceprog.com), it has a different board layout and uses only through hole components for easy construction. It has two outputs one for a +-5V signal source the other is a 0-10V signal… Continue reading