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.

The unit (HC-SR08 DDS_AD9850) may not start every time it is powered on, or it may take some time to finally start outputting a signal. The code controlling it is not the issue (proper reset sequence has been implemented), and the same code works flawlessly with another unit (same board layout, from another distributor). The most noticeable difference is that C8 (10uF capacitor, power supply decoupling) is of a different type, seems to be a polarized version in the defective board, and the solder looks "cold" in both ends. I wish I had the option to contact the seller before posting this review, but at this point this unit is not usable for me. UPDATE: HiLetgo Customer Service replied quickly and provided a resolution; for this reason I changed my original rating from 1 to 3 stars.

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

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.

This unit is a piece of junk. Not worth the gas to do a return, so it is now in the trash.

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.

very dependable

Really hard time getting it to work with a Nano Ardunio