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Function Generator DIY KIT by JYE Tech FG085

3.2 3.2 out of 5 stars 117 ratings
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  • Generating continuous waveforms of Sine, Square, Triangle, Ramp (up and down), and Staircase (up and down)
  • Generating user defined arbitrary waveforms (AWG)
  • Generating frequency sweeping signals of selected waveforms. Start frequency, stop frequency, and sweep rate can be independently set
  • Generating servo test/control signals in micro-second resolution with user programmable pulse width, amplitude, and cycle
  • Frequency (period), amplitude, and offset can be incrementally adjusted with rotary encoder
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Customer reviews

3.2 out of 5 stars
117 global ratings

Customers say

Customers like the functionality, ease of assembly, and value for money of the precision measuring product. They mention it works extremely well, is fun to put together, and is well worth the purchase. Some also say the waveforms look decent and crisp. However, some customers are disappointed with the button functionality and have mixed opinions on the build quality.

AI-generated from the text of customer reviews

Select to learn more
Ease of assemblyFunctionalityValue for moneyWaveform qualityFun to buildEase of useBuild qualityButton functionality
57 customers mention "Ease of assembly"44 positive13 negative

Customers find the precision measuring product easy to assemble. They mention it's fun to put together, not at all difficult to use, and the directions that come with it are informative.

"...The kit arrived shortly after ordering and assembly was relatively easy if you are an experienced builder...." Read more

"...It was fun to put together, but once it was all done it didn’t power up. The power supply works. I tried adjusting the display pot but nothing." Read more

"Good diy product with very easy to follow instructions. It took me less than an hour to complete and had no issues at all with the build...." Read more

"...I found the setup instructions clear enough and the PCB is well labeled. The pre soldered smd components were soldered good too...." Read more

53 customers mention "Functionality"40 positive13 negative

Customers like the functionality of the product. They mention it works extremely well, is perfectly useful, and works well with their many oscilloscopes. The power supply works, and it's usable for general-purpose hobbyist use.

"...The power supply works. I tried adjusting the display pot but nothing." Read more

"...I needed a signal source to trouble shoot a stereo unit, and this worked well...." Read more

"The kit was easy to build and worked well initially. After several months the operation became unstable. It was impossible to select the function...." Read more

"...work in one direction, so if it's installed wrong then the keypad won't work properly. This is indicated on the instruction sheet...." Read more

38 customers mention "Value for money"38 positive0 negative

Customers appreciate the value for money of the product. They mention it's well worth the purchase, a good kit, and fun to build for a relative beginner at soldering. Some say it's a really nice piece of test equipment for their lab at a great low price.

"...Lab grade? No, but it is certainly a great product and a fun build for the cost." Read more

"Good diy product with very easy to follow instructions. It took me less than an hour to complete and had no issues at all with the build...." Read more

"As I am learning about electronics simply as a hobby this is a very good priced kit...." Read more

"...and thought it'd be a good enough addition to my bench and at a good price. What i didn't expect was for it to arrive 95% assembled...." Read more

13 customers mention "Waveform quality"13 positive0 negative

Customers are satisfied with the quality of the waveforms. They mention the actual waveforms are pretty darn good for a $46 kit using a couple of micro controllers. Customers also appreciate the clear plexi panels and layout.

"...I put in one that is 12vcd and boots up fine.The waveforms look decent...." Read more

"...It is a well made kit, and astounding how nice the waveforms are. It didn't work at first, but I honestly doubted it would...." Read more

"...The actual waveforms are pretty darn good for a $46 kit using a couple of micro controllers. I can't complain at all!..." Read more

"Nice little wave generator for experimenting with, will be better once i get a mini usb cable for my pc...." Read more

9 customers mention "Fun to build"9 positive0 negative

Customers find the product fun to build. They mention it's well-made, a kit for beginners, and great for experimenting with filter networks, PWM, and oscilloscopes.

"...Overall, this was a fun and useful kit. I recommend it for anyone in the electronics hobby or those who are curious..." Read more

"...It was a fun build and I would recommend it to anyone looking for a function generator to play around for hobby use." Read more

"Good kit, fun to build for a relative beginner at soldering. Plug a cheap 8ohm speaker into the output to annoy your friends and family for hours. :)..." Read more

"This was a fun little project, and it works pretty well now that it's completed. I had no difficulty at all in putting it together...." Read more

8 customers mention "Ease of use"8 positive0 negative

Customers find the product easy to use. They mention it's great for hobbyists, a good project for an electronics enthusiast, and an excellent addition to their test bench. Some also say it's handy on the experimenter's bench.

"...But overall a good project for an electronics enthusiast and great value for a full-featured function generator. My 15 y.o...." Read more

"...All in all, a wonderful addition to any bench or tool set." Read more

"Great for the hobbyist!..." Read more

"Fun little kit - and very handy on the experimenters bench. Settings are little odd - could use a better op manual to help with that...." Read more

24 customers mention "Build quality"12 positive12 negative

Customers have mixed opinions about the build quality of the product. Some mention it's made with high-quality components, while others say the switches are fragile and break out of the box.

"This kit is very well made...." Read more

"...After several months the operation became unstable. It was impossible to select the function...." Read more

"...It took me less than an hour to complete and had no issues at all with the build...." Read more

"...No padding = a cracked inductor and a returned package. The second one was in the same type of packaging but undamaged...." Read more

7 customers mention "Button functionality"0 positive7 negative

Customers are dissatisfied with the button functionality of the precision measuring product. They mention that the push buttons only go in one direction, there are too many buttons to do simple tasks, and the controls logic is a little fiddly.

"...One thing to look out for is that the switches will only work in one direction, so if it's installed wrong then the keypad won't work properly...." Read more

"...with the assembly instructions warning you that the push button switches only go in one way. I totally missed this...." Read more

"...Second, the unit was difficult to operate. The mode switch acted crazy. I had to power off then on to reset...." Read more

"...Too many buttons to do simple tasks which is very frustrating.The signals are all noisy even using a battery, they defeat the purpose...." Read more

My DIY kit arrived almost fully assembled
3 out of 5 stars
My DIY kit arrived almost fully assembled
i've been adding stuff to my electronics bench pretty steadily recently, and i saw this product for a good price and thought it'd be a good enough addition to my bench and at a good price. What i didn't expect was for it to arrive 95% assembled. All i have left to do is put the front and back acrylic plates onto the brass standoff screws and mount the BNC connector to the board. The assembly also has a strong garlic odor that transfered to my hands while touching the board. all told, if i knew i was buying something fully assembled i'd have bought a different product.
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Top reviews from the United States

Daniel Fay
5.0 out of 5 stars Well made, fun build, and good performance
Reviewed in the United States on January 6, 2017
Verified Purchase
This kit is very well made. The instructions are ever so slightly unclear, but with a little bit of intuition you should get it without a problem (just make sure to install the buttons with the correct orientation!). As for using it, its controls take a little bit of getting used to, as there isn't great documentation, but after a little bit of playing around with it the controls make sense and become basically intuitive. I tested a few different waveforms on an oscilloscope, up to 200 kHz. At that level the frequency had an error of about +/- 1 kHz, about +/- 0.5%. At lower frequencies (~ 0 Hz - 20 kHz) the frequency was nearly spot on the value it was set to.
Lab grade? No, but it is certainly a great product and a fun build for the cost.
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P J N
2.0 out of 5 stars Buyer beware of this product and company
Reviewed in the United States on June 9, 2020
Verified Purchase
BEWARE OF THE NO REFUND NO RETURN POLICY!!!!

The FG085 looked promising on paper. The kit arrived shortly after ordering and assembly was relatively easy if you are an experienced builder. Operation is a little clunky but for the price it seemed like it would be a decent compromise.
However, I immediately noticed problems with signal stability below 1V amplitude. I attempted to contact JYETech directly but they would not answer or grant access to their user forum. I opened a case with nooelec, which just became a blind for me to communicate with JYE. Every day they asked me to do a bunch of stuff, which I did to prove that the generator had issues. I ordered the unit on April 2nd. On May 4th, over a month later of hashing back and forth, I was told "We have sent them to JYETech who will be issuing your replacement directly."
It is now June 9th, there is no new unit and I was informed that there was no refund, or replacement after the unit was assembled. Yeah, Covid, China, etc etc but this is just bad customer service end to end.

Save your $50 and find a different unit, kit or whatever. I cannot recommend this FG085 or these vendors to stand behind this product.
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Jeff
1.0 out of 5 stars Didn’t work at all.
Reviewed in the United States on June 28, 2019
Verified Purchase
Bought the kit 2 years ago and it sat in my desk drawer until yesterday when I finally had time to play with it. It was fun to put together, but once it was all done it didn’t power up. The power supply works. I tried adjusting the display pot but nothing.
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Jeff
1.0 out of 5 stars Didn’t work at all.
Reviewed in the United States on June 28, 2019
Bought the kit 2 years ago and it sat in my desk drawer until yesterday when I finally had time to play with it. It was fun to put together, but once it was all done it didn’t power up. The power supply works. I tried adjusting the display pot but nothing.
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Corgi Bum
3.0 out of 5 stars Good product but the included ac adapter did not work for me. Easy to build
Reviewed in the United States on February 11, 2016
Verified Purchase
Good diy product with very easy to follow instructions. It took me less than an hour to complete and had no issues at all with the build. One thing to look out for is that the switches will only work in one direction, so if it's installed wrong then the keypad won't work properly. This is indicated on the instruction sheet.

I took off one star--tempted to actually drop it down to 3 because the included AC adapter puts out 15vdc, which causes the device to not turn on properly. I'm not sure if they are all like that, but mine did not work. I put in one that is 12vcd and boots up fine.

The waveforms look decent. At a higher frequency, you start seeing that square waves arent too square, but for my purposes it'll be fine.

I also 3d-printed out a case from thingiverse.

Edit: I revised from 4 stars to 3 because while there are many fg085s on Amazon, I chose this more expensive "package" because of the included AC adapter. I paid more for the convenience of not needing to source one that fits this unit. Unfortunately, the AC adapter that came included was not compatible.
Customer image
Corgi Bum
3.0 out of 5 stars Good product but the included ac adapter did not work for me. Easy to build
Reviewed in the United States on February 11, 2016
Good diy product with very easy to follow instructions. It took me less than an hour to complete and had no issues at all with the build. One thing to look out for is that the switches will only work in one direction, so if it's installed wrong then the keypad won't work properly. This is indicated on the instruction sheet.

I took off one star--tempted to actually drop it down to 3 because the included AC adapter puts out 15vdc, which causes the device to not turn on properly. I'm not sure if they are all like that, but mine did not work. I put in one that is 12vcd and boots up fine.

The waveforms look decent. At a higher frequency, you start seeing that square waves arent too square, but for my purposes it'll be fine.

I also 3d-printed out a case from thingiverse.

Edit: I revised from 4 stars to 3 because while there are many fg085s on Amazon, I chose this more expensive "package" because of the included AC adapter. I paid more for the convenience of not needing to source one that fits this unit. Unfortunately, the AC adapter that came included was not compatible.
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Ron
4.0 out of 5 stars Great kit, very minor isssues.
Reviewed in the United States on June 14, 2015
Verified Purchase
As I am learning about electronics simply as a hobby this is a very good priced kit. It took me about 2 and 1/2 hours to solder up and get it running. You do need 0.8mm/.032inch solder for this kit. A fine point solder tip would help too.

I found the setup instructions clear enough and the PCB is well labeled. The pre soldered smd components were soldered good too. As I am learning how to use it, I can't say about the features as compared to other FGs. It is easy to use and set values.

The bottom most panel will only fit with the posts if you soldered the capacitors completely flush to the board. When I solder I tend to leave a 1-2mm gap and it was enough to prevent the back panel from being flush with the posts. Because of this I had to use longer posts for the rear side in the end.

The LCD seems to whine. The pitch differs based on what how much is displayed on it. These appear to be common LCDs designs you can use with Arduinos or Raspberry Pis, but the chips are covered to prevent seeing what controls the LCD itself.

It would not be hard to add sides to the panels to make a full enclosure. So if you have some polycarbonate/plexiglass/Lexan laying around you can simply cut what you need and hot glue it to the panels or hinge it to the screw posts for easy removablity.

Other than that it's a nice kit and would recommend it if you can solder.
One person found this helpful
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