Author: voltlog

The New Rigol DHO800 Series Review | Voltlog #469

The wait is finally over for Rigol enthusiasts! After eight long years, the renowned oscilloscope brand has unveiled the highly anticipated DHO800 series, a remarkable upgrade to the beloved DS1054Z. As a proud owner of the latter, I was thrilled to get my hands on the top-of-the-line DHO814 model, courtesy of Eleshop.eu and Rigol.

Straight out of the box, the DHO814 exudes an air of modernity and refinement. Its compact, featherweight form factor is a stark contrast to its robust predecessor, promising to save precious real estate on your workbench. The glossy, 7-inch capacitive touchscreen with a resolution of 1024×600 pixels adds a touch of elegance, while the familiar array of buttons and knobs ensures a seamless transition for seasoned users.

Under the hood, the DHO814 packs a punch with an array of impressive upgrades. The bandwidth now starts at a respectable 70MHz, with the top-tier model boasting a 100MHz capability. The sampling rate has received a modest boost to 1.25GS/s, while the vertical resolution has undergone a game-changing leap to 12 bits, promising unparalleled signal capture and visualization.

One of the standout features is the UltraAcquire mode, which enables a staggering waveform capture rate of up to 1 million waveforms per second, ensuring you never miss a transient event. The memory depth has also increased to 25Mpts, providing ample headroom for intricate signal analysis.

InTheMail | Voltlog #468

Welcome back to another exciting mailbag video! In this edition, we’ve got a fantastic selection of electronics modules, tools, and accessories that are sure to pique the interest of any hobbyist or tech enthusiast. From practical storage solutions to unique bargraph displays and rapid prototyping boards, this video is packed with gems that might just inspire your next project.

Kicking things off, we have a pair of EVA storage cases that are perfect for safely storing and transporting small devices like logic analyzers or firmware debug tools. These compact and affordable cases are a must-have for anyone who values organization and protection for their electronics. Next up, we have a fascinating LED bargraph module that caught my eye.

This round, 31-segment display is a true eye-catcher and can be used in various projects, such as level indicators or visual displays. With options for different colors like green, red, and yellow, these modules offer versatility and a touch of retro charm. For those who frequently work with ESP32 or compatible modules, the prototyping PCBs featured in this video are a game-changer.

These boards allow for rapid prototyping and easy access to all pins, making them invaluable tools for any maker or developer. But that’s not all! We also explore a range of other exciting products, including a bicycle pump valve replacement, pneumatic fittings, high-quality cigarette lighter connectors (with a rant about delivery restrictions), connector adapters, USB Power Delivery decoy modules, and even an EMI filter module for power supply noise suppression.

Mastering PCB Cleaning with an Ultrasonic Cleaner! | Voltlog #467

Keeping your Printed Circuit Boards (PCBs) in pristine condition is crucial for ensuring optimal performance and longevity. While no-clean solder products are available, many fluxes and soldering materials leave residue that can corrode components, cause leakage currents, and compromise the overall aesthetics of your projects.

Fortunately, an ultrasonic cleaner offers a convenient and effective solution for thorough PCB cleaning. In this comprehensive guide, we’ll explore the benefits of using an ultrasonic cleaner, essential safety precautions, and a step-by-step process for achieving impeccable PCB cleaning results. The principle behind ultrasonic cleaning is a phenomenon called cavitation.

High-frequency sound waves create rapid pressure changes within the cleaning solution, generating countless microscopic bubbles that form and implode. As these bubbles collapse near the surface of the PCB, they release intense energy, dislodging dirt, contaminants, and residue from even the most hard-to-reach areas.

Before diving into the cleaning process, it’s crucial to observe a few safety precautions. Firstly, never run an ultrasonic cleaner dry, as it can overheat and damage the unit. Secondly, avoid using flammable liquids, as they pose a fire risk when heated. Lastly, consult component datasheets to ensure that the parts can withstand ultrasonic cleaning and submersion in liquids.

To achieve optimal cleaning results, choose a high-quality ultrasonic cleaner like the VEVOR Ultrasonic Cleaning Machine, which offers adjustable temperature, cleaning time, and ultrasonic power settings. Pair it with a suitable cleaning solution and deionized water for best results. The cleaning process itself is straightforward: fill the cleaner with the appropriate solution, submerge the PCB, and let the ultrasonic waves work their magic.

Post-cleaning steps include rinsing the PCB in deionized water and drying it with compressed air. One of the significant advantages of ultrasonic cleaning is its ability to dislodge residue from hard-to-reach areas, such as between component leads and under IC packages, ensuring a level of cleanliness unachievable through manual brushing alone.

Underfloor Heating Valve Actuator Board revD | Voltlog #466

In this captivating video, Voltlog unveils the latest iteration of their revolutionary ESP32-based Valve Actuator project – Revision D. Designed to streamline manufacturing and offer improved functionality, this enhanced version is a testament to the project’s ongoing evolution. Originally conceived as an open-source solution for controlling underfloor heating systems, the Valve Actuator project has gained a loyal following due to its compatibility with popular platforms like Tasmota, ESPHome, and Home Assistant.

With over a couple of hundred units already in operation, the RevD promises to further elevate the user experience and simplify assembly. One of the most notable updates in this revision is the ability to power the valves with a separate AC voltage, such as 24V AC. This feature caters to users with pre-existing underfloor heating systems, providing greater flexibility and compatibility.

Additionally, Voltlog has optimized the PCB design by transitioning from through-hole components to surface-mount technology (SMT) wherever possible, improving manufacturability and reducing potential errors during assembly. The RevD also introduces an innovative LED control feature, allowing users to turn the output status LEDs on or off via GPIO16.

This not only conserves power but also enhances the device’s versatility, making it suitable for discreet installations where visible LEDs are undesirable. Voltlog’s commitment to quality is evident in their collaboration with PCBWay.com, the official provider of printed circuit boards for the channel.

The limited-edition first batch of RevD boards boasts a stunning red solder mask with gold-plated ENIG finish, showcasing exceptional craftsmanship and attention to detail.

New 50Hz Thermal Camera Thermal Eye XH09 | Voltlog #464

The Thermal Eye XH09 from Xinfrared is a game-changer in the world of affordable thermal imaging cameras. With its impressive 256×192 resolution and a groundbreaking 50Hz refresh rate, this camera sets a new standard for outdoor enthusiasts and hunters seeking fluid and accurate thermal imaging capabilities.

The doubled refresh rate is the XH09’s standout feature, significantly enhancing the fluidity and real-time responsiveness of the thermal image. When tracking fast-moving targets or observing dynamic scenes, this rapid refresh rate ensures minimal lag, offering a seamless and detailed view of the surroundings.

Imagine being out in the woods, tracking wildlife or scouting for game – the XH09’s enhanced refresh rate ensures that even the slightest movements are captured swiftly and accurately, allowing for precise detection and tracking, giving you a notable advantage. While maintaining the high resolution and quality expected from Xinfrared, the XH09 also boasts practical features like an adjustable lens, allowing focal length adjustments from 9 to 13mm, and an observable distance of up to 500m for a 2m wide deer.

The included hard EVA carry case, USB Type-C cable, and mounting handle make it a convenient and portable solution for outdoor adventures. Beyond its outdoor prowess, the XH09 excels in household inspections, enabling you to detect potential insulation issues, check underfloor heating, or inspect electrical wiring with ease.

Its versatility and high-performance imaging capabilities make it a valuable tool for a wide range of applications.

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.

2023’s Best Electronics Engineer Gifts | 462

As an electronics engineer, having the right tools can make all the difference in productivity and efficiency. With the 11.11 Shopping Festival just around the corner, it’s the perfect time to upgrade your workbench or surprise your engineer friend with a thoughtful gift. In this guide, we’ve curated a list of top-notch products that are sure to delight any tech enthusiast.

First on the list is high-quality ESD protection from Welectron. Their anti-static mats are not only durable and chemical-resistant but also free from unpleasant odors, ensuring a comfortable working environment. Whether you need a large mat for your workbench or a compact one for your computer desk, Welectron has got you covered.

Next up is the highly anticipated Raspberry Pi 5, a true powerhouse for any electronics engineer or hobbyist. With a significant performance boost and new features like PCIe Gen2 and an RTC module, this little computer packs a punch. As an official Raspberry Pi distributor, Welectron is the go-to source for snagging one of these coveted devices.

For those in need of a thermal camera, the options are diverse and tailored to different use cases. The DytSpectrumOwl is a top choice for PCB inspection on your workbench, while the UNI-T UTi260B and Infiray P2 PRO offer portability and macro lens capabilities, respectively. Whichever you choose, a thermal camera can unlock new levels of productivity and troubleshooting prowess.

The Sugon 8650 Hot Air Station is a game-changer for soldering and rework tasks. With its precise temperature regulation, massive power output, and user-friendly interface, this station can handle even the most demanding jobs with ease. Investing in this top-of-the-line tool is a surefire way to elevate your soldering skills.

Last but not least, the FNIRSI USB power monitors (FNB58 and FNB48) are sleek and highly capable tools for measuring USB power delivery. With their exceptional resolution, cable chip detection, and Bluetooth data logging, these monitors are a must-have for any engineer working with USB-C and power delivery protocols.

InTheMail | Voltlog #461

As the 11.11 festival approaches, bringing with it a wave of tantalizing discounts, it’s the perfect time to explore some exciting new electronics and tools. This latest InTheMail video showcases a diverse range of products that cater to both the passionate hobbyist and the professional technician. One standout item is the smart UV curing lamp, a game-changer for PCB repairs.

Designed specifically for curing UV-curable solder masks, this lamp offers convenience and efficiency. No more tedious aiming of a UV flashlight – simply place your PCB under the lamp, set the timer, and let it work its magic. The raised corners ensure compatibility with various PCB sizes, making this a must-have tool for any electronics enthusiast.

For those seeking a lithium-ion battery solution, the featured battery pack case is an intriguing option. Designed to mimic the form factor of a standard 12V lead-acid battery, it offers the ability to create custom lithium-ion packs using 18650 cells. While the charging capabilities of the included BMS board raise some questions, this product opens up exciting possibilities for upgrading devices with improved capacity and discharge rates.

Cable management is a recurring theme, with the introduction of screw-hole cable ties and cable combs. The former offers a neat solution for routing wires and cables, while the latter promises to bring order and organization to even the most chaotic cable installations. Safety is also a priority, with the inclusion of a face protection mask.

While its intended use in the kitchen may be questionable, it could prove invaluable for tasks like Dremel work or polishing, shielding your face from airborne debris.

Tag-Connect To ST-Link or J-Link Adapter PCB | Voltlog #460

In the ever-evolving world of electronics engineering, efficient and cost-effective solutions are always in high demand. One such innovation that has gained traction is the Tag-Connect JTAG connector, a game-changing alternative to traditional connectors. These pogo pin-style connectors offer a standardized form factor, making them a versatile choice for a wide range of PCB designs.

Tag-Connect connectors boast several advantages over their traditional counterparts. Firstly, their compact size saves valuable PCB real estate, allowing for higher component density and more efficient layout. Secondly, their simplicity eliminates the need for additional components, reducing overall manufacturing costs.

Furthermore, their durability and ease of use make them an ideal choice for both manual and automated production lines, streamlining the manufacturing process and minimizing labor costs. One of the challenges faced by electronics enthusiasts and professionals alike is interfacing Tag-Connect connectors with programming tools like ST-Link or J-Link, which often have different connector types.

To address this issue, a custom adapter PCB was designed, bridging the gap between these connectors and ensuring seamless integration. This adapter PCB not only solves compatibility issues but also showcases the versatility of Tag-Connect connectors. By incorporating footprints for various connector types, such as the 10-pin Tag-Connect model and a VoltLink connector, the adapter PCB becomes a versatile debugging interface, capable of supporting UART, GPIOs, and even flashing ESP32 modules through a Tag-Connect wire.

The design process of the adapter PCB highlights the importance of careful footprint selection and the ability to adapt to unforeseen challenges. Even when a footprint error occurred, the modular nature of the design allowed for a workaround, ensuring the PCB’s usability and demonstrating the resilience of the electronics engineering community.

MDP701 New Micsig High Voltage Differential Probe Series | Voltlog #459

Welcome to a new Voltlog episode! Today, we’re diving into the world of high-voltage differential probes with the Micsig MDP701. This latest offering from Micsig builds upon the success of their renowned DP series, delivering impressive upgrades and cutting-edge features. Derived from their innovative SigOFIT optical fiber isolated probe technology, the MDP701 boasts an expanded bandwidth of up to 200MHz, with a 500MHz version on the horizon.

This increased bandwidth ensures accurate and detailed measurements, even in high-frequency applications. Additionally, the Common Mode Rejection Ratio (CMRR) has been significantly enhanced, reaching an impressive -26dB at 100MHz and better than -80dB at DC, ensuring precise differential measurements.

Micsig’s commitment to quality is evident in the MDP701’s premium build. The probe features a sleek metal enclosure for the oscilloscope interface and a smooth matte black plastic body, exuding a professional and durable feel. The high-quality cables and strain reliefs further reinforce the product’s robustness.

In our hands-on review, we showcase the MDP701’s performance in a high-voltage measurement scenario, highlighting its ability to safely measure active switching devices in a power supply operating on mains voltage. The probe’s 5MHz bandwidth limit switch effectively reduces unwanted noise, ensuring clean and accurate waveform displays.

While the MDP701 lacks the hard carry case of its predecessor, it compensates with a comprehensive accessory kit, including test clips and a USB-C cable for convenient connectivity. Whether you’re an electronics enthusiast or a professional engineer, the Micsig MDP701 is a valuable addition to your toolkit.

Available through distributors like eleshop.eu, this high-performance differential probe is now within reach for a broader audience.