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New (toy?) DSO+LCR meter - Fnirsi DSO-TC2 (june 2022)

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tunk:
Yet another small DSO, this time with a twist:
- 2.5MSPS, 200kHz bandwidth
- 2.4" screen
- 80kHz/5V PWM test signal
- LCR+transistor tester

More info e.g. here:
https://www.alibaba.com/product-detail/FNIRSI-digital-handheld-Oscilloscope-LCR-Transistor_1600516268209.html?spm=a2700.shop_plgr.89.4.3912463d8ik5w4

ledtester:
You can also find it on aliexpress -- search for "DSO-TC2".

I wonder if they just added an atmega328p along with the stm32 mcu they use for their scope. Or if they translated the transistor tester code to run on the stm32 -- like perhaps this project:

https://github.com/mean00/stm32ComponentTester

tautech:
Just like many of their earlier products.....capability severely hampered by its very limited sensitivity.
10mV/div = 100mV/div when using a 10x probe.  :--

thm_w:

--- Quote from: ledtester on June 02, 2022, 10:04:50 pm ---You can also find it on aliexpress -- search for "DSO-TC2".
I wonder if they just added an atmega328p along with the stm32 mcu they use for their scope. Or if they translated the transistor tester code to run on the stm32 -- like perhaps this project:

https://github.com/mean00/stm32ComponentTester

--- End quote ---

That would be hilarious, but considering its only $50, I'm thinking they cut every corner, and kept it all in the one MCU.

Ali link: https://www.aliexpress.com/item/3256804119843938.html

--- Quote ---Transistor detector introduction:

    Automatically identify and measure various transistors, including NPN and PNP transistors, N-channel and P-channel FETs, junction FETs, diodes, dual diodes, thyristors, etc., as well as passive components such as resistors, inductors, and capacitors
    Automatic detection of pin definitions
    Automatically parse the infrared code of NEC protocol
    Other functional modes: including circuit continuity test, 0~16V input voltage measurement, PWM output, 0~24V Zener diode measurement, DS18B20 temperature sensor measurement, DHT11 temperature and humidity sensor measurement, etc.
--- End quote ---

24V zener is not available in the regular testers right?
They must have a 24V boost inside at least.

ledtester:

--- Quote from: thm_w on June 02, 2022, 10:50:28 pm ---24V zener is not available in the regular testers right?
They must have a 24V boost inside at least.

--- End quote ---

The TransistorTester firmware has the option for utilizing a DC-DC converter to test Zener voltages of up to 50V but a lot of hardware implementations do not include this option.

More details available on numbered page 12 of:

https://github.com/kubi48/TransistorTester-documentation/blob/main/pdftex/english/ttester.pdf



--- Quote ---That would be hilarious, but considering its only $50, I'm thinking they cut every corner, and kept it all in the one MCU.

--- End quote ---

I'm really curious to see what's inside one of these things. They could very well be using the LGT8F328P clone chip since they seem to be available for a lot less than a real 328p. Then they would just have to figure out a way for the two MCUs to share the display.

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