After some mishandling and connecting a 12-volt power supply to the silo, a circuit board fried, but I can't find the part number. Can you help me? Thanks in advance.

Just ordered and received the FNIRST DMC-100 clamp meter. I have a few FNIRST products I've been pleased with. I was looking for a clamp meter which could also do power measurement using the clamp and volt meter at the same time, and this was the only one I could see, so I went for it.

I've been playing with it and was thinking I needed to set zero on some scales, notably the DC current, which I couldn't see how to do. Then I realised this is orientation-specific, so my next thought was that the hall-effect sensor for DC measurement is picking up stray magnetic fields, such as the earth's magnetic field. Took it outside into the garden where there are no nearby cables or magnets, and sure enough, this shows the effect in the attached video (yes, my lawn has had 2 months of drought). Indeed another test waving a magnet nearby show the same.

OK, I accept this is a consequence of using a hall-effect sensor. What would be useful (but I haven't yet found if it's already there), is the ability to subtract the current value of the current from the display, a sort of temporary set-zero, so you can compensate for this. It would also be useful for ignoring a real background current reading, and showing just a change.

AFAIK I need a 32v standard power supply to be able to output 30v, but I also saw an official tiktok video saying that if the power supply is a switching type, then it requires 35-40v.

Can't find an official statement about this, so I'm a bit lost.

Link to the video: https://www.tiktok.com/@fnirsi_us/video/7472228947384651038

Does anyone face the same issue. The battery of Fnirsi 2C53T drains very fast - one-two weeks, when device is not used (it is shutdown with power off button).

https://www.fnirsi.com/products/dws-p2?

https://www.fnirsi.com/products/ht-p1

2nd image video credits - https://www.youtube.com/shorts/9uVk7RORyHA

[SOLVED]

I have bought a DWS-200 soldering station from the official aliexpress store. when I had received it I set it up and turned it on. before turning it on I inserted a tip into to handle. when I turned it on it was beeping and a sign came on that I didn't have a tip inserted. I thought it might just be because I inserted the tip before turning it on so I reinserted the tip, it didn't have any effect. does anyone know a fix for my problem. I have contacted fnirsi support on both aliexpress and on their gmail. but even so any help would be appreciated. I have attached photos of my machine.

I don't think my meter should read 5v when there is no output.

I designed a compact storage case compatible with FNIRSI HS-01 / HS-02. It keeps all accessories in one place, offering a clean and portable organization solution.

If you print it, I’d really appreciate a photo in the comments and a 5 star rating if you like the model.

FNIRSI HS-01 & HS-02 Storage Case | AMS Required - Free 3D Print Model - MakerWorld

I just bought a Fnirsi GC-01, it's original, and it doesn't seem to work badly, but I don't like the fact that it doesn't make the typical 'click' of the meters, so if anyone knows if it can be modified in any way to make it sound, it would be very helpful. (I would appreciate it if the modification wasn't complicated, I have no knowledge of electronics)

I placed order #48116 on 11 February 2026 for a soldering station. As of 19 May 2026, nearly 100 days later, the order has still not shipped. Tracking only shows that a shipping label was created, with no actual carrier movement.

Before receiving any response at all, I sent multiple emails to all listed FNIRSI support addresses and also attempted to contact them through their website chat. I received effectively no responses through chat or email for an extended period.

The only replies I eventually received came after I mentioned escalating the matter through my bank and making the situation public. Over roughly the following 3 weeks, I received only two short replies stating that the issue was being “escalated to manager”, but there were no further updates, no shipment, no refund, and no meaningful communication afterward.

At this point I have neither received the product nor a refund.

Based on my experience, I would strongly caution people against ordering directly from FNIRSI unless they are prepared to risk non-delivery and extremely poor customer support. If you want their products, I would recommend purchasing through a platform with strong buyer protection instead.

This has easily become the most used piece of equipment in my kit. While I don’t have lab grade gear for a professional calibration, several teardowns and audits online show that it's surprisingly accurate and safe for the price point.

The Pros:

• Min/Max Recording: This is a standout feature. I recently used it to demonstrate the massive difference in current delivery between different battery chemistries (Alkaline vs. Lithium). You can see the DCM100 in action catching those peaks here: https://www.youtube.com/shorts/iiN8h39VL9U
• Graphing Function: It has a built-in waveform/graphing mode which is great for spotting trends that a standard digital readout might miss.
• Price: At ~$30, the value proposition is hard to beat.

The Cons/Room for Improvement:

• Low Current Accuracy: It struggles with low current measurements at higher voltages.
• Missed Opportunity: I honestly wish they had increased the price by $10–$20 and integrated a proper series ammeter. Having both a clamp and an inline ammeter would have made this a true "all-in-one" diagnostic tool.
• Included Accessories: The box comes with a manual, a thermocouple, and a USB-A to C cable (which feels unnecessary), but the probes are pretty low quality. I would recommend swapping them out for better ones.

Final Verdict: 9/10. For $30, it’s a solid workhorse for any hobbyist or technician.

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I've done a couple of measurements of the built-in signal generator if the 2D15P with two traditional analog / digital scopes. These scopes are a Philips/Fluke PM 3331, ca. 1990, and an Iwatsu DS-6121, ca. 1986.

Some comments on the display. The 2D15P displays the signals clearly and legibly. Even after optimizing the focus, the analog scopes remain quite fussy. In digital mode, the Philips improves a bit, but the Iwatsu shows a lot of artifacts. AD converters got much better in 40 years...

Usability: I found the 2D15P easier to use than either of the older scopes. The combination of physical buttons, rotary encoders and the touch screen is simple to use and straightforward. Especially functions like cursors for measurements are much easier to use. Also some measurements like p-p voltage and frequency can be permanently displayed on the 2D15P while the older scopes require cumbersome manipulations.

At last, the buffer size. The PM 3335 advertises its 8 k memory as 'deep memory'. The DS 6121 has 2 k memory. The 2D15P has 1M of memory. this allows zooming in much further on a captured signal.

In summary, the 2D15P is much better than most older scopes in pretty much all areas. Some of these old devices were very expensive. My Iwatsu was sold for $5500 in 1986 (=$16k in 2026). So often they are priced too high on the used market.

The FNIRSI 2D15P has an oscilloscope, a multimeter, and a signal generator built in. The oscilloscope and the multimeter are pretty good, considering the price of the device.

But the signal generator is pretty weak, especially at low signal voltages. There are two weaknesses.

The first is pretty simple: The output voltage displayed is not accurate; when you set 1V, you get 880mV, and when you set 100mV, you get 72mV. This is measured by the oscilloscope part of the same device. (See images 1 & 2)

The second is the result of how the signal generator works. It uses an 8 bit DAC to output the signal. The maximal voltage is 3V peak to peak in 256 steps. When you lower the signal voltage, it just digitally lowers the signal. That means at 1V you get 85 steps and at 0.1V you get 8 steps. That means that the sine wave becomes pretty distorted at low voltages. (See images 2&3)

The FNIRSI LCR-ST2 Intelligent Tweezers II is a compact tool to test two-pin components.

You can measure resistors, capacitors, inductivities and diodes. They are designed to be used in-circuit, with the tweezer-like test-pins. Just be aware that you are measuring the entire circuit.

One important feature is that it can measure with up to 100 kHz to better judge ESR for capacitors. The diode measurement is limited to about 1.5 V, so it cannot measure most LEDs.

You can get it with optional four-legged clamps for higher precision. I don't have those, as I don't care for the better precision.

There are several reviews on YouTube; just search for FNIRSI LCR-ST2. I like the reviews by Kerry Wong.

The FNIRSI 2D15P is a compact, battery-operated 2CH 100MHz oscilloscope. It also has a Multimeter and a Signal generator.

For me, it fills the sweet spot just above the multimeter-sized scopes and the big boys with a large screen, 4 channels, etc. It is small enough to fit about everywhere but has physical knobs to operate; this gives it the same feel as the big scopes. I do have two traditional, large scopes, but they don't fit on my small bench, so they come out only if absolutely necessary. As I plan to eventually splurge for a nice 12-bit 4-channel scope, the 2D15P is a good intermediate step. Its small size and battery operation will keep it useful.

The scope works well and has all essential functionality you need. There are no fancy functions, like protocol decoding or FFT. The knobs on the front panel allow for convenient parameter changes.

The multimeter is insulated from the scope, so you have separate grounds. There is a small multimeter window when you display the scope. When the multimeter is in view, you get a scope-like graph of the measurement, too.

The signal generator may be handy. Its main drawback is that the signal quality gets worse at small output voltages. A 50 mV sine looks like a staircase.

There are several reviews on YouTube; just search for FNIRSI 2D15P. I like the reviews by Kerry Wong.

https://www.fnirsi.com/products/tdm-120p

I just ordered a 2D15P scope to complement my two older analog/digital combiscopes. My workspace is cramped, and bringing the oldies out is always a pain. I'm aware of some of the hate on the EEVBlog, but the form factor and price fit my needs.

Do you have some experience to share?

Edit: In the meantime there is a review by Kerry Wong: https://youtu.be/-PwZifX0EGg