JYE Tech 06204KP 062 LCD oscilloscope DIY kit Review
Low Cost Fully Digital LCD Oscilloscope DIY KIT.
JYE Tech DSO 062
Power supply not included.
Price : $49.00
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JYE Tech 06204KP 062 LCD oscilloscope DIY kit Feature
- Resolution - 8 bits, Analog bandwidth - 1MHz
- Max input voltage - 50Vpk (1x probe) [500Vpk for 10x probe]
- Auto/Normal/Single trig modes
- Rising/Falling edge trigger
- FFT function available - size of 256 points and 512 points selectable, sampling rate of 1Ksps to 2Msps selectable
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2 of 2 people found the following review helpful.
Tiny screen, works if you are aware of limitaitions
By Engineering
Really tiny display, but it works, and seems to be the newest version.
Some caveats:
- The display is really tiny, much smaller than the pictures makes it look. The display resolution is fairly coarse, probably less than the ADC can support, so it will be interesting to try changing the firmware to stream raw data to a pc.
- Like many "pocket" digital scopes, it seems to be missing a decimation filter. Slower time/div settings are accomplished by reducing the sample rate, which leads to a risk of aliasing fast signals as if they were much slower. If looking at an unknown frequency, you will have to start at the fastest setting and then slow down, to be sure that you aren't viewing an alias caused by undersampling. Another clue you are looking at an alias is that it may be impossible to adjust the trigger to stability - but set the scope to an appropriate sample rate, and it will trigger fine. In contrast, a good digital scope would have a decimation filter in an FPGA, such that the ADC is alway run at a high sample rate, and the slower display settings produced by filtering the signal to a lower effective sample rate and bandwidth - precluding aliasing of signals which meet the ADC's ultimate nyquist limit. But the ATMEGA cpu probably doesn't have the horsepower to do that at 20 MSPS.
- The trigger, position, etc adjustment are one button push per click, it's too bad they don't continue to advance if the button is held down.
- It appears to be possible to change the firmware. On JYE tech's website there is source code only for a very minimal version, but hex files for the version which comes in the scope.
- It would be nice to have a marker for the trigger time position. Also to have some indicator flash whenever it triggers, as it's not always clear if you are looking at a rock-steady display, or if the display is frozen because the trigger condition isn't met. Of course it has run/hold functionality and single-shot trigger modes as you would expect from a DSO.
- It would be nice if there were another decade of voltage sensitivity available - especially if you wanted to use a 10x probe.
- Buy a BNC jack to use instead of the RCA jack (looks like one should fit as the footprint seems to be the union of both) or at least a BNC-to-RCA adapter so you can use a real probe.
Building is fairly straightforward, but instructions are sparse. It may be worth consulting a picture to make sure everything is going together right. Don't solder the pushbuttons on the wrong side of the board! (they go opposite most of the other components). The occasional component lead which connects to the ground plane can require a lot of heat to solder, suggesting that there may not be enough thermal relief on pads which connect to the ground plane. In a few cases I ended up using a hot air rework station to put some extra heat into the board as I soldered ground connections with an iron. Make sure to mount the regulator on its heatsink before soldering, and be very careful of that middle ground lead as it won't regulate without a connection there, and the joint will be hard to get at once the LCD is soldered on.
0 of 0 people found the following review helpful.
Great first O-scope
By Eric Fossum
Took me about an hour to put this together as a 4 out of 5 solderer. Documentation is horrible, but what do you expect. After assembly I would put a pulse width signal from an Arduino or something and get familiar with the controls before using. Also consider a two channel, I love this, but I needed to measure two signals just after first use.
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