Onyehn XR2206 High Precision Function Signal Generator DIY Kit Sine/Triangle/Square Output 1Hz-1MHz Adjustable Frequency Amplitude + Transparent Case Box Shell

I purchased this kit because I needed a cheap frequency generator to troubleshoot It is worth spending the time with my 13 year old son to teach him about electronics and how to solder properly. I am going to give you a couple of tips to help you, a couple of things that aren't immediately obvious. Thanks! I. 1. In order to install the two 10uf capacitors (C3,C4), place each one through the holes, and then lay them down on their sides, then solder them in. If you install the capacitors standing up, they will The second is. The case must be prepped for inscription before you paint, peel off the protective covering, and paint the letters white (or the chosen color), wipe off the excess, and apply paint on the lettering only so the letters are easier to see. Wait for it to dry before beginning. 3
The mounting feet are created on the board itself with 4 short screws and 4 nuts, then float in the holes on the bottom of the case with the mounting feet. A long thread is made into the holes at the bottom of the case, which the long screws run from top to bottom. Have fun!.

Johanna Trevino

| May 23, 2021

You get a lot of bang for your buck. Putting together this kit is easier than most, and we won't break the bank if there are still some problems when you're putting together the kit for the first or second time. If you are learning how to solder, it is always a good idea to build kits that do not cost too much. This provides a way to learn what you did wrong and not make the same mistakes again. Building kits gives you valuable skills (soldering, de-soldering). (Fix your mistakes) Soldering (make sure you do not make more errors). Circuitry (learning how to read and understand analog and digital circuits. Troubleshooting a circuit that isn't working is the most thrilling part of the job. You should remember that building kits is an opportunity to gain skills and knowledge, so please make sure to have fun while doing it. Having a kit that works after you build it is just the cherry on top. Whenever you are ready, start with easy kits, and work your way up to harder kits. worry if you do not make mistakes because you will not learn much if you do not do so. The first electronic kit I made was after my first electronics class in the tenth grade. I've been involved with electronics for over 43 years. In my opinion, it works well, however, I noticed something odd with the amplitude control. As you turn the knob in the CW direction, the amplitude decreases instead of increasing as you turn the knob in the clockwise direction. It is normal to expect to see increasing frequency with CW knob rotation which applies to all the other two controls as well. In addition to the third one, I plan to make a fourth for a friend as a present. However, I will give them a ready-made one so I can have fun Unfortunately, I made a mistake.

Luca Burgess

| Sep 13, 2020

While the board was simple to assemble, it was too short to hold it in place and the screws were unable to hold the board in place. Moreover, the enclosure isn't tall enough, so I had to squeeze it with my fingers before I could put the long screws in. A total of 5 settings [65KHz-"Octa"] are available for the device The above frequencies are 1MHz and 3kHz respectively The following frequencies are recommended [65kHz - 100kHz] Three thousand, ten thousand, ten thousand The frequency is 100 Hz, and the frequency is 1Hz to 20 Hz (In 10Hz) This is [65KHz-] You will get a garbage signal if you go below 1MHz. ******* ******* ******** It looked like the signals were 65kHz, despite the fact that the frequency range I obtained
[100Hz - 127kHz] 3k makes sine waves that looked very triangular and have a range of 144 Hz to 4 kHz. The bandwidth is 1KHz, which is not very good. - [10Hz] The 100Hz was not able to meet our needs and only generated some jittery signals in This is 1Hz- I was able to run at 10Hz without any problems. As far as price goes, it's OK.

Rosalie ROBSON

| Feb 16, 2021

Due to the lack of clear instructions, I wouldn't recommend this to a new kit maker. * Note * My kit came with an 8-pin header instead of a 10-pin header for selecting the frequency range.

I did make some changes to my kit as I built You can find a video on YouTube that describes this where I gleaned some of my changes from)
- The IC was inserted into a higher quality IC socket. The following - I had to rewire the Amplitude Pot since it was in the wrong position. The following - You can use a 50K resistor across the Amplitude Pot to reduce the output, since the waveform was flat-topped. In this case, I would probably replace it with a lower value to lower the output more (it is currently about 5v out. ) Replacement of C3 with a 1uf cap per the data sheet of the integrated circuit/br> - I have replaced R3 & R4 with the following For lowering the output, install R5 with a 1K resistor each - R1 was replaced with a 5K resistor to lower the square wave output (a larger resistor could have been used to lower it A 10uF capacitor was added in series with the Sin/Tri output to block the DC charge. It's a good device for what it is (A cheap (AKA cheap) Function Generator), but with a little work it can be made better, but for the price it's a handy little item.

Stevie Friedman

| Feb 06, 2021

To summarize, the instructions say to solder the parts onto the board using the parts list and schematic as a guide. However, it takes almost a full page of poor translation to do so, using In this step, we will weld the front board from low to high principles. And "the IC whether in favor of, such as in favor of, please make the correction in a timely manner. IF the paper is folded, the cheap ink on the document tends to rub off or fall off. Paper is folded in the unit before it is shipped. The parts list can no longer be read partially due to this issue, as shown in the picture.

At the end of the day, schema and parts location diagram reading skills are necessary to put together this kit. Furthermore, the circuit traces and lands for the through hole components are extremely small. It is essential that the person doing the soldering has a high level of skills to avoid damaging the board during the soldering process. I was pleasantly surprised when I found that the unit worked when I tested it. I have one last point to make. According to the design, the output level potentiometer is backwards from where it would be expected. You move it counterclockwise to increase the output.

Ahmad Hebert

| Nov 16, 2020