Signal Generator Kit, XR2206 Precise Function Signal Generator Frequency Module DIY Kit Sine Triangle Square Output Adjustable 1Hz-1MHz, 9-12V Direct Current Input(1 Piece)

This is a great cheap little kit considering it includes a case and knobs.Tips:1. Check online for all sorts of tips2. Make sure all parts are soldered tight onto the board since the case holds the board in place by everything just fitting tightly. Example is IC socket as well as variable resistors.3. Two of the tall capacitors fit better if you lay them down on the board or else they can push on the case.4. I needed to just slightly file one of the case tabs so I did not need to force it in.5. If you have not build one of these inexpensive kits and their plexi case. Just be patient and enjoy the process. Example pealing paper of of the plexi does take time but will work.6. The 4 short screws are for alignment and spacing to the case bottom. You may need to slide them a little in their board holes, just loosen and re-tighten them, to get them to align with the holes in the case bottom.7. After soldering you need to trim all the parts such as caps and resistors but ALSO other parts such as the power connector. Put the bottom part of the case on, after inserting the 4 short screws and nuts, to see what all should be trimmed.PROS1. Cheap2. Works fine when built3. You get a nice little case and knobs4. Fun little projectCONS1. No real instructions at all. Just a faded circuit diagram and parts list. The diagram is correct and the circuit board is stenciled well so you can work this out without any help.2. Zero instructions on the case. As mentioned above the 4 small screws are attached to the circuit board via the 4 nuts and are use to align the board to the case and the nuts act as spacers. The long screws hold the case together without nuts, they just screw into holes in the case and work fine as such. Be careful since I same some builds online that skipped the 4 small screws.

As others have noted, the assembly instructions for this kit leave more than a little bit to be desired, which warrants a single star. On the other hand, I did get it assembled (first try!) and it's a terrific little device for very little money which warrants 5 stars.I'm a hobbyist and not looking for great precision. I suspect that for other users the accuracy level of this device is insufficient.Now, to the problems with the instructions. The instructions packaged with the product were unreadable. It looks like what you get after a copy is made, then another copy from the first, then a third copy from the second, etc. My copy looks like its about the 50th copy and was unreadable with much of the text partially to completely faded out.But I found two other sellers of this same product on Amazon, and one of them had fairly decent photos of the instructions in their Amazon listing, so I downloaded those images and printed them.Even then, there were issues with gibberish and some totally incorrect information.Right of the bat you are told "The components are welding the front board ..." It's pretty easy to figure out that by "welding" they mean "soldered", but a novice to soldering devices onto boards would thing that the soldering must be done from the front.Another example, mounting instructions for the electrolytic capacitors say "The positive short feet negative long feet." The first problem is that this comes close to aforementioned gibberish, but the more significant problem is that the best interpretation would be that the short lead is the positive lead and that the long lead is the negative. Unfortunately, that is completely incorrect. The standard for these capacitors is the opposite - the short lead is the negative lead. Fortunately, these capacitors also had markings on them indicating which lead was the negative, confirming for me that the short lead was the negative.There is more negative/positive confusion. For the power supply there is the statement "inside outside is negative polarity". This was in the instructions I found online. That part of the instructions turned out to be legible in the instructions that came with the product and said unambiguously "center positive/barrel negative." So that's what I went with.There are many things left unsaid in the instructions, so for someone who has no experience with electronic components and soldering they are completely insufficient. For example, while you are warned that the IC must be properly inserted but they don't bother to mention that you do that by matching up the notch in the IC with the notch in the socket. Instead here is what the instructions say (I kid you not): "Pay attention to the direction of the IC, insert the might damage the chip!" and "check the IC whether against, such as anti please timely correction." Now that last bit of gibberish is completely undecipherable to me!The four screws that were in the kit for mounting the circuit board onto the bottom of the case were too short. I had to use my own M3 x 12 mm which worked perfectly. It also took a lot of fiddling to fit the top onto the case while getting each of the four sides to fit into their slots. Eventually it all came together, but it was a very frustrating 15 minutes.Then I powered it up and connected it to my scope and it was working perfectly! Got nice sine, square and triangular wave forms at varying frequencies. So that's left me with a nice feeling of accomplishment.Other reviews have said this as well. If you have some experience with electronic components and soldering, and don't need calibration level accuracy, this will probably work well for you. Otherwise, stay away.

Great little generator for the price. It actually works better than I expected. Assembly instructions are almost nonexistent, but there is enough information to be able to put it together successfully.

There were no building instructions, but the parts list helped map components to the board. Assembly was uneventful, except...This project has three major issues:1. I was missing a capacitor. On the replacement, it was also missing a (thankfully) different capacitor. If 2 of 2 units have missing parts, that's a poor experience for anyone.2. One of the capacitors is slightly too tall for the case, and it won't seat cleanly.3. The square, sine and triangle waves produced by this device are terrible quality with excessive ripple and demodulation.

All in all, not bad and well worth the price. It was a fun build with a few head-scratchers along the way. See below.Was favorably impressed with the engraved labels on the bottom surface of the case top. They're easily legible and are quite well done considering the small text size.The finished device does pretty much what the descriptions and specs indicate.While I'm satisfied, there were a few things that could have been better. None were fatal and all were relatively easily corrected. The solutions are out there, or in here if I caught everything.Assembly:- Documentation (one small, two-sided, ninth daughter of a Xerox page) print quality was abysmally bad. Text was readable, barely, including the parts table but the schematic was completely illegible. Before doing anything with this kit, go here...https://helpfulcolin.com/xr2206-function-generator-kit-improved-instructions/...for a third party page with very good instructions and images, including a clean version of the schematic, board photos, etc. It's a vital resource for working with this kit.- The board symbology for the electrolytic caps C1, C3 and C4 shows a circle with one half shaded. I was not familiar with that symbology but was finally able to work out that the shaded side of the circle indicates the negative side of the capacitor (for this kit - may not be universally true). The short lead and white stripe on the cap go to the shaded side of the circle.- 1K resistor missing. Since I had a seabag full in the parts box, not a real problem. In return, I got an extra M3 X 10 mm screw and nut, so I consider it an even trade.Tip - I recommend that you solder the electrolytic caps C1, C3 and C4 laying down. I didn't and the top cover wouldn't go all the way down. Was able to fix it by bending C3 and C4 down but had to make a hole in the cover for C1. Was able to do that by hand with a 7 mm brad-point drill and a little file and hobby knife work. It's not too ugly and cover does go all the way down now.Function:Device does everything the specs and description says it does.- Obvious clipping of triangle and sine waves if the amplitude is too high but trimming them down with the amplitude pot produces fully formed waves.- As noted elsewhere, the sine wave is not a true sine wave. It's more like a triangle wave with radiused tops and bottoms. Sides of the waveform appear flat, not with the constantly changing slope of a true sine wave. Probably fine for most things.- Square waves show the effect of lagging rise times at higher frequencies, beginning at about 40 KHz. The left edge of the pulse is deformed near the top, grossly so in the highest part of the frequency range; the right edge of the pulse is perfectly square. Not an unexpected issue and like the pseudo-sine wave, probably OK for most applications.

Pretty reliable signal generator kit. For how cheap it is, it can create some pretty ok signals. The instructions are a single sheet with the circuit schematic on one side and a parts list on the other. The schematic side was a tab bit faded/blurry, like the printer was running out of ink, but it was easy enough to follow and get working.You do need to provide you own power for this circuit in the form of a 9V battery connected to a barrel jack. The connector is not included and will need to bought seperately.Good kit to build for fun, but obviously won't beat $100 benchtop equipment.

It's OK as a cheap little kit for soldering practice. When complete, you have a noise maker but be careful what you connect it to. It's not a kit for complete beginners either-- you have to know about the different component types, need for polarity and so on. The supplied instructions are VERY minimal. Among the many issues:* The printing of the instructions is so poor, it is hard to read. Text and diagrams are blurry.* Sine and triangle waves output with a large DC bias (like 5V) so you need to AC couple the output. A 1uF electrolytic cap worked for me for audio frequencies.* Output level is pretty high (even with volume all the way down) so be careful connecting to audio equipment.* Especially outside of audio frequencies, the generated wave forms are not very clean.* Case is fiddly to assemble, and there are no printed instructions for it.Search youtube for ideas on how to improve this kit-- but, frankly, the extra effort is not worth it.Bottom line-- OK for soldering practice and playing with noise making, but mostly useless as a function generator. You would need an oscilloscope to be sure of what it is outputting. If you can afford that, I suspect you can afford a real function generator.

Well worth the money and time to assemble. Does what it is advertised to do, and seem to be stable and versatile. If you've never built something electronic, or you don't have in-depth knowledge of electrical components, then this is likely not the project kit for you to learn. Everything is labeled on the board, and the parts list is clear, but you do need to know and understand how to read the component's values (color codes, capacitor numbers, etc...). You don't need the schematic, this is a paint by the numbers project board. I enjoyed it and had fun building it. It will be useful in many of my other projects I build from scratch.

Die beiden Funktionsgeneratoren stellen sich als sehr nützliche Helferlein im Elektroniklabor heraus. Man kann ein Stnadrd-Netzteil (12V) anschließen und bekommt im NF Bereich sinnvolle Sinus- Dreieck und Rechteck Wellenformen raus. Der Preis ist unschlagbar und kleine Gehäuse gibt es auch dazu...Dei Eistellung der Amplitude und der Frequenz ist einfach und mechanisch stabil...

The case and screws do not fit as the solder joints on through holes are not accounted for. Supplied screws are at least 8mm short regardless so they don't fit through the assembled laser cut case even without the pcb inside. The debadged DIP-16 package was completely crushed in packaging which required much careful manipulation of the legs (many almost snapped off during the process) to get them back in position, and the headers were in pieces with the pins requiring straightening out with pliers and supergluing back into the plastic to keep them aligned during soldering (they're still not straight)I'd be demanding a refund if I hadn't left them to one side before assembling. Do not purchase, absolute rip off at this price. I see they have relisted them under different listings to attempt to avoid the poor rating. Just don't buy anything resembling this off Amazon. Look out for the same pictures etc in the relisted products.

I knew of the flaws of this generator when I bought it. Very useful after mods and so inexpensive.

Tut was es soll.Mit den Folien war es etwas doof.Wenn man die Bauteile ganz dicht auf die Platine setzt und anlötet, bekommt man später auch den Deckel geschlossen 😇

Bei mir waren alle Teile (2 Bausätze) da, lesbar beschriftet, sauberes PCB. Die Anleitung ist etwas gewöhnungsbedürftig in chinesischem Englisch aber durchaus nachzuvollziehen. Wem das nicht reicht, der findet bei RandomNerdTutorials (mal googeln) alles, was man braucht. Das Gehäuse passt sehr knapp, die Schrauben zum Befestigen des Boards sind definitiv zu kurz. Man sollte aufpassen, unter dem Board keine zu großen Lötpunkte zu machen. Für meinen Spielkram gut zu gebrauchen, Profis werden da wohl andere Ansprüche haben.