Precise Function Signal Generator Kit XR2206 Frequency Module Sine Triangle Square Output Adjustable 1Hz-1MHz DC 9-12V

This kit works exactly as I expected it to.Having watched videos of others assembling and testing this kit I knew that the amplitude control operated in reverse of what I wanted so altered the circuit board to reverse the amplitude control operation.I plan to design my own case for the second unit with the POT's mounted on a sloped portion of the case and wires routed to the circuit board. With this configuration is won't be necessary to alter the circuit board but instead cross connect the outer wires of the POT.If everything works out, I'll post the design on Thingiverse.

When I first put power to this I used a 9v battery. It was OK, but with higher frequencies it was getting unstable. So I decided to use a 12v source, it works better, a little bit more stable over the 9v. Also hooked a 10uf capacitor to the sine output, which helped. The highest frequencies (65K-1Mhz) gave me 354Khz-4.4Mhz sine waveform. Crappy sine wave at this frequency. All other frequencies gave me a nice waveform.

waveforms fall off at higher end. OK for just fooling around.

Quick and easy to assemble. Work as it should.

You cannot alter the amplitude of the squarewave (although the circuit you build around this device could easily account for that with either an amplifier or a resistor), but the amplitudes of the triangle and sine waves can be altered. The frequency can be altered with decent gradations, and the waveforms look pretty good, considering I got this for so cheap and assembled it in a hour or so :) Also, the acrylic casing (which is hard to remove from the protective paper) makes it look really cool.

Just a cheap piece of garbage. Amplitude control functions in reverse to what you think it should. Mounting screws are too short to fit the board into the case. Save your money and your time...

I have used several of these for DIY electronics and all have gone well and worked well except one that blew a cap when power applied. The paper provided showed the cap size needed and fortunately I was able to replace it and it worked. In general these are great and handy for small simple applications

Not the greatest technology or sturdy container. You pull jumper pins to change setting. A neat evening "science project" or soldering tutorial, but not a reliable signal generator. Fun, and you get what you pay for, but not a tool or reliable instrument by any means. Good stocking stuffer for the younger electrical enthusiast.