... for beginners who are new to RF like me, and even the cheapest RF power meters cost hundreds of RMB. For electronics enthusiasts who follow the principle of "spend when you should, save when you can", DIYing an RF power meter is a great alternative. The first step WAs to define the functions and Design the hardware circuit. To test RF power, a chip called a detector is required. I had not found a suitable option for a long time as it WAs my first time working with an RF detector, until I saw the power detection module on the E25-C test baseboard, which use ...

You're absolutely right—when moving into high-frequency PCB Design (in the MHz to GHz range), layout becomes critical for ensuring signal integrity and performance. At these frequencies, traces behave like transmission lines, so maintaining controlled impedance is essential. For most RF applications, a 50-ohm microstrip or stripline trace is standard, and you’ll need to calculate trace width based on your PCB stack-up, dielectric material, and copper thickness. Trace layout should avoid right-angle bends, use 45° angles or curves, and keep high-speed traces as short and direct as possible. Differential signals (like USB or LVDS) require matched trace lengths and consistent spacing to maintain impedance and minimize skew. The PCB stack-up plays a huge role in high-frequency performance. It's best to place signal layers adjacent to solid ground planes to provide a continuous return path and minimize loop area, which helps reduce EMI. A 4-layer or higher board with dedicated power and ground planes is generally recommended. When choosing a stack-up, consult your PCB fabricator to ensure the dielectric thicknesses and materials support your impedance requirements. Common mistakes in high-speed PCB Design include failing to provide a solid ground reference under signal traces, using excessive or poorly placed vias that introduce unwanted inductance, and improperly terminating high-speed lines, which can result in reflections and ringing. Power integrity is also crucial—decoupling capacitors should be placed close to power pins, and using a mix of values helps cover a wider frequency range. Lastly, improper grounding between analog and digital sections can lead to noise coupling, so careful partitioning or single-point grounding is advised. With proper attention to these details and the use of simulation tools, Designing high-frequency PCBs becomes much more manageable and repeatable.

... courses for complete beginners. He explains concepts step by step and assumes no prior electronics knowledge. DroneBot Workshop (YouTube) – Excellent if you WAnt to understand why circuits work instead of just copying code. Programming Electronics Academy (YouTube & website) – Great for learning Arduino programming fundamentals in a structured WAy. For written tutorials, I regularly use: Arduino's official documentation for understanding the basics and library references. Play with Circuit for beginner-friendly tutorials on sensors, modules, communica ...

... behaviors: Moore outputs change only on state transitions (i.e., clock edges), while Mealy outputs can respond immediately to input changes without WAiting for a state transition. In practice, this means that Moore machines are more stable and less prone to glitches, making them easier to simulate and debug. However, they may require more states and often have a One-clock-cycle delay in response. On the other hand, Mealy machines can be more efficient, often requiring fewer states and providing faster responses, but they can suffer from glitches if the inp ...

I’ve been learning about finite state machines and came across Moore and Mealy models. I understand that they both use states and transitions, but I’m a bit confused about how their outputs are handled and when to choose One over the other. Can someone explain the key differences in a practical context, and maybe give some guidance on when it’s better to use Moore vs Mealy in a digital Design?

For a portable IoT device, Li-ion is generally the better choice because of its higher energy density and longer lifespan. It’ll give you more runtime per charge and is easier to manage in terms of charging circuits and protection. That said, Li-Po can work for IoT devices, but it’s usually overkill unless you have specific Design constraints—like needing a really thin form factor or a custom shape that standard Li-ion cells don’t fit. One area where Li-Po might make sense is if your device has occasional power spikes, since Li-Po batteries can handle higher discharge rates.

Hi guys The popularity and ease of use of the IDE dose make it a very good learning tool. There are however several other platforms that are just as versatile. For instance the Microchip family do have excellent IDE and a big plus is the simulator/debugger. This alone makes the Microchip platform a brilliant Piece of free software. Back to the Arduino, it will be around for a long while to come. I am not yet fluent in Arduino and the C language but I am working to change that. Happy coding. It is the WAy of the future Jeff Monegal