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Signal Generator DIY Kit, KKmoon XR2206 High Precision Function Signal Generator DIY Kit Sine/Triangle/Square Output 1Hz-1MHz Adjustable Frequency
Specifications for this item
|Customizable Template Name||Frequency range: 1Hz-1MHz.|
|Fabric Type||Adjustable frequency and amplitude.|
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This signal generator DIY kit is professional product to generate sine/triangle/square wave. It's a DIY kit for you to weld and install.
- SINE WAVE
Amplitude: 0-3V at 9V DC Input
Distortion: Less than 1% (at 1KHz)
Flatness: +0.05dB 1Hz - 100kHz
- SQUARE WAVE
Amplitude: 8V (no load) at 9V DC Input
Rise Time: Less than 50ns (at 1KHz)
Fall Time: Less than 30ns (at 1KHz)
Symmetry: Less than 5% (at 1KHz)
- TRIANGLE WAVE
Amplitude: 0-3V at 9V DC Input
Linearity: Less than 1% (up to 100KHz) 10mA
Function Signal Generator DIY Kit:
Voltage Supply: 9-12V DC Input
Waveforms: Square, Sine & Triangle
Impedance: 600 Ohm + 10%
Wide power supply range, use 9-12V external power or 9V battery (NOT Included).
All are through hole components, easy for installation.
Adjustable frequency and amplitude.
Frequency adjustment features coarse tuning and fine tuning.
|1KHz-Square Wave||1MHz-Square Wave||Triangle Wave||1MHz-Sine Wave||50Hz-Sine Wave|
Package Size: Approx. 12 * 8 * 2cm / 4.72 * 3.15 * 0.8in
Package Weight: 69g / 2.46oz
1 * Signal Generator DIY Kit
1 * User Manual (English)
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Unfortunately, I was hoping there was instructions on how it works, but can't dock off points for a loose assumption.
If you notice distortion in the output, your amplitude is too high. It will clip if you don't adjust the amplitude potentiometer.
I have the output (AC coupled which removes the bias) in my review. I forgot to take a picture of the square wave, but I found the rise time being around 200ns with little ringing.
I should note that I used a 9 volt battery with a connector soldered directly to the board instead of using the jack.
I haven't checked the quality of the case, but I'm not planning to put it on anytime soon.
I'm not a professional with electronics, so I'm not completely sure if the accuracy is sufficient for testing equipment. However, it looks fantastic to me.
It has a few peculiarities. As previously noted, the amplitude pot is wired backwards of the two frequency pots.
The assembly instructions appear to have been written by an early version of Google Translate.
The case is a Chinese puzzle box. You'll end up taking it apart and putting it back together several times before it's right.
Overall, the kit is complete but the casing is a little bit delicate (I managed to ham-fistedly over tighten a corner and break the plastic). I reassembled it a few times to find an optimal fit and a little super glue did wonders. The actual board and back plate could use some standoffs to account for the variation of height on the underside once the components are soldered but it works.
Fun little project, the power supply noise affects the signal pretty adversely. Running from a small lithium battery seems much more stable when looking closely at the waveform.
1) Both the sine and triangle functions really just resemble sine and triangle on the scope, but the distortion from true sine and triangle is pretty high. I didn't check the THD of the sine function (~2 kHz), but I would guess it's in the 4-8% range and gets much worse when approaching full amplitude.
2) The amplitude knob operates in reverse - clockwise LOWERS the signal amplitude. Sometime in the future I may reroute the traces so it is correct, but will live with it for now.
3) The squarewave function has no amplitude control which was noted in the listing, but still a significant drawback.
On the PLUS side it comes with a plastic assemble-yourself case with labels for the jumper, output, knob functions laser etched. Unless you really have to have a clear case I would recommend leaving the paper on at least the top panel, otherwise you'll probably be straining to see the lettering with all the circuit board showing through. It's also very reasonably priced and I intend to throw it in my travel electronics test box that also contains a DSO-138 scope and multimeter.
1. The pots on the board feel cheap and one broke, I was able to replace it easily enough.
2. The screws did not seem long enough to hold the case together. I just used hot glue.
Other than those two things this is a great kit for people that are new to hobby electronics or seasoned professionals. I use this thing a considerable amount alongside my lab grade function generator. The square wave on mine is not working that well but the sine and triangle wave work just fine. This is a wonderful function generator for the price and can be put together with basic electronic knowledge.