HiLetgo DDS AD9850 Signal Generator Module 0-40MHz Sine Wave and 2 Square Wave Output IC Test Equipment

Many of these modules available on the Internet are duds but this one was perfect. It works within specifications and the quality was just fine.

This review is for AD9850 Signal Generator Module board. This board uses AD9850 and it is capable to produce 0-40Mz Sine and Square wave. In order to program the output frequency, one of the ways is to use Arduino. Since this board can handle both 5v and 3.3v, it can work with either UNO/NANO, due or other Arduino boards. The Arduino library can also be found online easily. For me I end up using an Arduino UNO with a prototype shield as this module is breadboard friendly. One friendly reminder of this board, it can generate square wave with 5v amplitude. For sine wave, it can only generate around 1v peak to peak voltage. Also make sure you adjust the POT for the duty cycle for the square wave. I made a mistake initially and I didn't get any square wave output due to my pot was set to 0% duty cycle. Note that the POT has no effect on the sine wave output. Since I have no problem program the frequency as the board claims, I would recommend this board.

I am perplexed about this board. It is fully functional and I was able to easily program and use it. There is documentation for this specific module online (search "eimodule ad9850") and tons of sample code. The output is ok, but not as clean as promised by the Analog Devices simulation software. Where I am really confused is the price. The chip itself sells for at least $14 from Analog Devices (and twice as much fron electronic relailers like Digikey). Counting the PCB, the probably expensive 125MHz oscillator, and the other passive components, I hardly see how it can sell for less than $14, prompting me to think that the 9850 IC could be counterfeit and not representative of the actual product... Regardless, this is a great little board for the price.

Doesn't work as intended. Tried to set up to produce a sin output but it does not function as other AD9850 chips do. The output voltage was nearly sevenfold less than what it should be. Disappointing. Don't buy.

This is a nice part to make a signal generator. Mine works great and is handy very often.