Teardown – VoltLog

Where is the ADC? RIGOL DM858 Teardown | Voltlog #486

Ever wondered what lies beneath the sleek exterior of the high-tech Rigol DM858 multimeter? In a recent teardown video, we took a deep dive into the inner workings of this precision instrument, uncovering the components that make it tick. Right off the bat, the teardown revealed the beautiful construction and assembly quality, with key areas like power supplies, connectivity, and a clever system-on-module design.

The power supply section was straightforward, with a USB-C input and a series of switchers to step down the voltage to the required levels. The real star of the show was the SODIMM module, housing an Allwinner A40i-H quad-core Cortex-A7 processor, RAM chips, flash memory, and a power management circuit.

This modular design offers several advantages, including cost savings, flexibility, and the ability to swap out components as needed. Moving on to the input section, we encountered a curious square PCB module housing the user-accessible fuse and input protection components like gas discharge tubes, Metal Oxide Varistors, and clamping devices.

Underneath a small shield, we found relays likely responsible for input switching and range selection. One of the most intriguing discoveries was the potential use of the microcontroller’s built-in ADC (Analog-to-Digital Converter) instead of a dedicated ADC chip. This design choice, if true, would be a clever solution for high sampling rates and accurate measurements.

However, not all mysteries were solved. We encountered a few unidentified components, leaving us scratching our heads. Can you help shed light on these enigmatic parts? Leave a comment below and join the discussion!

Affordable 10Gbit Switches Are Here! Mokerlink | Voltlog #484

The world of high-speed networking is no longer limited to enterprise-level gear. With the rise of affordable options like the Mokerlink 2g04210GSMX, upgrading your home or small office network to blazing-fast speeds has become a reality. This compact managed switch packs a punch with its 4x 2.5Gbit ports, 1x SFP+ 10Gbit port, and 1x RJ45 10Gbit port, all encased in a sleek metal enclosure.

But why do you need 10Gbit Ethernet, you might ask? One compelling reason is the need for lightning-fast access to network-attached storage (NAS) devices. With modern computers often equipped with limited built-in storage, a high-speed NAS becomes essential for storing and accessing large files, such as media libraries or creative projects, without frustrating bottlenecks.

The Mokerlink 2g04210GSMX strikes the perfect balance between performance and affordability, offering a robust feature set at a mere $100 price point. Its passively cooled design ensures silent operation, while the solid metal construction and thoughtful thermal management contribute to long-term reliability.

Setting up the switch is a breeze, with a user-friendly web management interface that provides comprehensive control over port configuration, VLAN settings, and other advanced networking options. Whether you’re a home user or a small business owner, this switch adapts to your needs, delivering the flexibility to optimize your network’s performance.

But what truly sets the Mokerlink apart is its attention to detail. From the well-soldered components to the extra thermal pads and heatsinks, the teardown reveals a commitment to quality that often surpasses similar offerings from other brands. And with stocking locations in the US and EU, along with FCC and CE certifications, you can rest assured that your purchase is backed by reliable support and hassle-free returns if needed.

Excellent Build Quality Inside The UNI-T UT8805E | Voltlog #481

In the world of high-end multimeters, the UNI-T UT8805E stands tall with its impressive build quality and top-notch components. In a recent teardown video, we got an up-close look at what makes this professional-grade instrument tick. The teardown process revealed a meticulously designed interior, with high-quality parts sourced from reputable manufacturers like Analog Devices, Texas Instruments, and Maxim.

The mainboard boasts a large, matte green PCB panel with ample space, showcasing UNI-T’s commitment to quality. One of the standout features is the AD7122-2 24-bit, sigma-delta ADC from Analog Devices, capable of sampling up to 31kS/s, although UNI-T has wisely limited it to 5kS/s for improved noise performance.

Complementing the ADC is the MAX6225AESA+ 2.5V voltage reference with an impressive tempco of 1.5ppm per degree C and long-term stability of 20ppm/1000 hours at 25°C. The analog section is a true marvel, with a plethora of high-quality components like AD8622 rail-to-rail op-amps, OP72 op-amps, an AD637 RMS converter chip, ADG1209 multiplexers, and a MAX333A quad analog switch.

Input protection is top-notch, with surge arrestors, metal oxide varistors, and beefy film capacitors. At the heart of the instrument lies a TRION T20F256 FPGA, responsible for sampling data from the ADC and managing the auto-ranging features and measurements. The front panel boasts an STM32F407 Arm Cortex-M4 application processor, handling data from the FPGA/ADC and managing the display and keypad.

While UNI-T acknowledged a couple of issues in the initial review, they’ve assured that a newer revision has addressed these concerns. A fresh unit is on its way for further testing, so stay tuned for updates on this impressive multimeter’s performance.

Excellent Build Quality Inside The UNI-T UDP3305S | Voltlog #479

If you’re an electronics enthusiast or professional, you understand the importance of having a reliable and high-quality power supply on your workbench. The UNI-T UDP3305S has been making waves in the industry, and after using it for a month, I can confidently say it’s my favorite bench power supply.

However, a thorough review wouldn’t be complete without a deep dive into its inner workings. In this blog post, I’ll share my findings from tearing down this impressive device. The teardown process revealed a level of build quality that exceeded my expectations. From the matte green FR4 PCB, which is a hallmark of high-end production lines, to the tidy wiring and locking connectors, every aspect screamed attention to detail.

The toroidal transformer, mounted on a solid bracket with rubber insulation, is a testament to the engineering prowess behind this power supply. One of the standout features is the modular design. The back IO panel, main body, and front panel are separate modules, making servicing and maintenance a breeze.

The power stage module, which houses the independent channels, is a marvel of engineering. It features current shunts, bridge rectifiers, MOSFETs for regulation, and relays for input voltage transformer tap selection. The front panel is where the real magic happens. It houses the brains of the operation – an STM32H750 microcontroller, a powerful Cortex-M7 with a floating-point unit and advanced peripherals.

Complementing this is a trio of high-precision DAC (DAC8562) and ADC (ADS1118) chips, ensuring accurate voltage and current regulation across all channels. Throughout the teardown, I was impressed by the attention to detail and the use of high-quality components. From the Fujicon and Macon capacitors to the Hongfa relays, every component has been carefully selected to deliver exceptional performance.

In conclusion, the UNI-T UDP3305S is not just a powerhouse on the outside; it’s a masterpiece of engineering on the inside as well. The build quality, modular design, and top-notch components make it a worthy investment for anyone seeking a reliable and precise bench power supply.

Inside the RAK7289v2 LoRa Gateway & TTN Setup Tutorial | 465

In this engaging video, we embark on an insightful journey through the installation and setup process of the RAK7289v2 LoRa Gateway. The video begins with a captivating teardown, unveiling the intricate design and components that make this gateway a powerhouse in IoT connectivity. The disassembly reveals a meticulously engineered system, with multiple antennas strategically positioned for optimal performance.

The layered metal shielding not only provides a robust mounting point but also creates a solid ground plane, minimizing electronic interference and ensuring seamless antenna functionality. As we delve deeper, we uncover the core components that drive this gateway’s capabilities. The RAK634 WiFi Module ensures reliable wireless connectivity, while the RK5146 LoRa Concentrator module, with its 8-channel capacity, forms the backbone of the LoRaWAN communication.

The RAK8213 module, housing the Quectel EG95-E LTE modem, enables cellular connectivity, further expanding the gateway’s versatility. The video also sheds light on the power input circuitry, meticulously analyzing the components to ensure compatibility with various voltage inputs, including lead-acid batteries.

This attention to detail ensures reliable operation in diverse environments, including remote installations. Moving beyond the hardware, the video provides a comprehensive tutorial on configuring the RAK7289v2 gateway to connect to The Things Network (TTN). From initial setup to remote management using RakWireless’ WisDM interface, every step is carefully explained, empowering viewers to seamlessly integrate their gateways into the IoT ecosystem.

AllPowers R600 LiFePo4 Power Station Review & Teardown | Voltlog #456

Welcome to an in-depth review and teardown of the AllPowers R600 LiFePo4 Power Station. This robust power station is a true powerhouse, designed to cater to the needs of outdoor enthusiasts, travelers, and those seeking a reliable backup solution during power outages. Boasting a substantial 299Wh capacity, the R600 is built around LiFePo4 battery cells, offering several advantages over traditional lithium-ion batteries.

These cells provide an impressive cycle life of 3,000-4,000 cycles before losing 20% capacity, a wider operating temperature range, better depth of discharge tolerance, and enhanced safety due to their inherent chemistry. Despite its impressive capacity, the R600 is a heavyweight contender, tipping the scales at 7.3kg – nearly double the weight of its lithium-ion counterpart, the R600.

This added heft is a trade-off for the increased energy density of lithium-ion cells. The R600 is a versatile powerhouse, offering a plethora of output options. It features two AC outlets (600W max, 1200W peak), two USB-C ports with Power Delivery up to 200W, two USB-A ports with Quick Charge support, and two DC outputs (12V, 10A max).

This wide range of outputs ensures compatibility with various devices, from laptops and smartphones to power tools and appliances. One of the standout features of the R600 is its built-in UPS functionality. With a claimed 10ms switchover time, the R600 can seamlessly transition from grid power to battery power, ensuring uninterrupted operation during power outages.

This feature is a game-changer for those who rely on consistent power for critical tasks or equipment. The R600 also offers solar charging capabilities, with support for up to a 200W solar panel and a maximum input of 300W. This eco-friendly charging option makes the R600 an ideal companion for off-grid adventures or sustainable living.

In terms of build quality, the R600 exudes a premium feel. Its robust enclosure, reinforced with ribs and stiffening rods, ensures durability and protection for the internal components. The attention to detail is evident in the use of high-temperature silicone wiring, labeled connectors, and a modular design for easy maintenance or repairs.

While the R600 boasts impressive features and capabilities, it’s important to note that its larger form factor and increased weight may not suit everyone’s needs, especially for those prioritizing portability. However, for stationary use or short-distance transportation, the R600 is an excellent choice, offering a reliable and safe power solution with ample capacity and versatility.

EastTester ET5410A+ Electronic Load Review | Voltlog #453

In this comprehensive review, we take an in-depth look at the EastTester ET5410A+ Electronic Load, a 400W max, 150V, and 40A fully programmable dummy load. With its 3.2-inch TFT display, this unit promises an improved user interface over the 7-segment display found in the Kunkin KP184. However, as the review unfolds, it becomes clear that while the ET5410A+ has some notable strengths, it also has areas that could benefit from improvement.

One of the key aspects evaluated in the review is the accuracy and precision of the unit. The manufacturer claims a resolution of 1mV and 1mA, but the reviewer found that this was not always the case, with the display sometimes showing only 10mV and 10mA resolution. After some investigation, it was discovered that a setting in the menu allowed switching between a low range (20V, 3A) and a high range (150V, 40A), which affected both the maximum input and the display resolution.

The functionality of the ET5410A+ is impressive, with features like battery testing, LED testing, and transient testing modes. However, the review highlights some potential software bugs, particularly with the battery discharge feature in Constant Resistance mode, which some users reported issues with on older firmware versions.

Build quality is a mixed bag, with both good and bad aspects. The reviewer praises the overall PCB assembly but raises concerns about the mains earth wiring, placement of wires and connectors, and the lack of full plated footprint holes for the MOSFETs. Safety concerns are also raised, with the earth connection passing through the PCB and soldering issues observed during the teardown.

AllPowers S300 Power Station Review & Teardown | Voltlog #445

As the summer months approach and outdoor activities beckon, the need for portable power solutions becomes more prevalent. In this era of gadget dependency, keeping our devices charged is a constant concern, especially when venturing into the great outdoors. Enter the AllPowers S300 Power Station, a compact yet capable solution that promises to keep your electronics powered up, no matter where your adventures take you.

In a previous review (video #417), I explored the Bltzwolf PG1 power station, a reliable but bulky option that often left me carrying excess capacity. The AllPowers S300 aims to strike a better balance, offering a more compact form factor without sacrificing too much battery life. Boasting a 74Ah capacity, the S300 packs a punch in a sleek and lightweight package.

It features three USB Type-A ports (5V 3A each), a USB Type-C port with Power Delivery (60W input, 100W output), a couple of 12V 5A DC jack outputs, a 5W wireless charger, and a 12V 5A cigarette lighter output. Charging options include a 12V DC input or the USB Type-C port (60W), and it even supports solar charging via an Anderson connector, making it an ideal companion for off-grid adventures.

The true sine wave AC outlets (300W max) and built-in LED flashlight further enhance the S300’s versatility, making it a comprehensive power solution for camping trips, road trips, or even as a backup during power outages. One of the standout features of the AllPowers S300 is its status LCD and Bluetooth connectivity.

The LCD provides real-time information on battery levels, runtime estimates, and active ports, while the app offers remote control over the AC sockets, DC system, and LED lights – a convenient feature when the power station is tucked away in your tent. While the S300 may not match the output specifications claimed in the user manual for some ports, it still delivers ample power for most travel needs.

The wireless charger, however, could benefit from a redesign to better accommodate devices with camera bumps or uneven surfaces. Overall, the AllPowers S300 Power Station impresses with its build quality, modular design, and thoughtful features. Its compact size and reasonable capacity make it an ideal travel companion, and the included solar panel option further enhances its appeal for off-grid adventures.

If you’re in the market for a portable power solution that strikes a balance between size and capability, the AllPowers S300 is definitely worth considering.

How To Disable Apple AirTag Speaker | Voltlog #440

Apple’s AirTag has been a game-changer in the world of tracking devices, allowing users to keep tabs on their belongings with precision and ease. However, one feature that has proven to be a double-edged sword is the AirTag’s speaker, which emits sounds to alert users of its presence. While this feature is designed to prevent illegal tracking, it can also be a nuisance for those using AirTags for legitimate purposes.

In this blog post, we’ll explore a simple and effective way to disable the AirTag’s speaker, giving you the freedom to track your belongings without unwanted audible alerts. By following a few straightforward steps, you can safely disassemble the AirTag and remove the magnet from the speaker, effectively silencing it.

The process involves carefully prying open the AirTag’s enclosure with a utility knife, taking care not to damage the retaining clips. Once opened, you’ll have access to the speaker assembly, where you can gently remove the magnet using the knife blade. This simple modification will prevent the AirTag from emitting sounds, allowing you to track your items discreetly.

It’s important to note that this modification should only be performed on AirTags you own and for legitimate tracking purposes. Misusing AirTags for illegal tracking activities is strictly prohibited and can have serious legal consequences. By disabling the AirTag’s speaker, you’ll be able to take full advantage of its tracking capabilities without the risk of unwanted audible alerts, ensuring a seamless and discreet experience.

Whether you’re tracking your bicycle, luggage, or any other valuable possession, this simple hack will give you peace of mind and control over your AirTag’s functionality.

Another Cheap Nuclear Radiation Tester | Voltlog #423

Welcome to a new video, today we’ll be taking a look at yet another cheap radiation detector and it’s going to be similar to the one reviewed in Voltlog 416, except it’s cheaper. It’s also not as big physically and it’s not a multifunction tester, this one just measures radiation but let’s start with our basics, this is the packaging it comes in, inside the box you will find this hard shell carry case which is a nice addition when compared to the previous model we reviewed and btw this one doesn’t really have any branding or a particular model mentioned, it’s just a generic radiation tester but because of that I would image that it’s likely you will find this sold under different names, brands or even shapes.

Inside the case the meter sits nicely in this cutout and you get a short USB-C charging cable, a hand strap and a short user manual. Like mentioned this is smaller physically which could be a nice advantage, but also comes with a smaller screen. We have a couple of rubber bands on the sides and a metal clip on the back, with the charging port located on the bottom. Plastic feels soft & decent, matte black, I quite like that.

On paper at least this seems to have better sensitivity when compared to the previous model I reviewed but realistically given the size and cost of the unit, I think it must be using a similar miniaturized geiger muller tube which is not the most sensitive tube for this type of application but it does have the size and cost advantage. We’ll be able to see more about this topic in the teardown but first let’s turn on the unit.

The screen on this unit feels a bit small at just 2 inches. I mean , in this reading mode, I can clearly see the readings which are using this nice and big 7-segment font, but the small text on the blue ribbons, that seems a bit small to easily read. On the plus side, brightness seems good, easily visible even under my bright video shooting lights. The problem is more apparent when you switch to the menu system which feels really crowded, they went with this thumbnail arrangement, the icons feel small, the text feels small. I would have probably preferred just a simple list menu for this with bigger text.

In terms of functionality you get the standard measure & display screen but you also have the options of setting up alarm thresholds and the meter can continue monitoring with the screen off for up to 20 days of battery life and it will trigger an alarm once the threshold is exceeded. It lets you configure the screen off timeout as well as the auto power off timeout which is nice and It can also do data logging although I have not seen any mention of the available memory. A couple of other settings for things like language or screen brightness are also available from the menu system.