This is my second JYE-DSO the first has been faultless for a couple of years now. I use them more often than my standard mains oscilloscopes because they are just easier to fire it up off a 9v battery and take up far less work space than my bench units. There are limits (200KHz, 5mV-20volts/div, 500Seconds-10uSecs timebase) but for maker projects they are well suited. A steady hand when putting the kit together and average+ soldering skills helps but no surface mount components in the 15001K kit.

The display of frequency, voltage (P-P and RMS) and duty cycle is great for Arduino or ESP8266 debugging (particularly PWM outputs) and the triggering is stable. A 10Xprobe extends them for mains-level or Vacuum tube applications, so get one of those to complete your kit.

This last unit arrived two weeks earlier than expected - a definite plus - I was keen to get it up and running.

The device works. Maybe it would be nice to specify that the output pins are NOT potential free contact (dry contact) and may has to be relayed if necessary.

This board has everything that a CY7C68013A developer board needs:
* A reset switch
* A jumper to disconnect the EEPROM, in case you screw up programming it
* Every single available pin except WAKEUP, not just GPIOs, is broken out to the headers, even SDA/SCL, making it trivial to e.g. add a larger EEPROM
* A power switch is a nice touch given the 3V3 power available on the headers
* Four mounting holes are nice too

Regarding the following:
> With the board firmware can be achieved through the core function of the logic analyzer.
This means that the board is programmed to appear as a device 0925:3881 Lakeview Research Saleae Logic using the on-board EEPROM. There is no actual firmware inside, it uses a "C0 load". It will work as a logic analyzer with any supporting software (e.g. PulseView), however it is not ethical to ship a device using Saleae USB VID/PID. Instead, Sigrok's USB VID/PID, 1D50:608D, should be used, which will also enable using all 16 possible channels in the logic analyzer, not just 8 with the default VID/PID pair. See https://www.sigrok.org/blog/sigrok-firmware-fx2lafw-013-released and https://sigrok.org/wiki/Fx2lafw for details.

The only other downside is the lack of schematic.

Purchased Nano V3.0 ATmega328P-AU Microcontroller Board I have not received Item, No communication from Seller.

Would be better if frequencies above 1Mhz where more fine tunable.Great kit , very stable output.I would buy it again.