I’m working on a balun for a differential front-end receiver (CMT2310A) and see that they quite often use a shunt element (inductor) across the balanced port of the balun. From what I could gather is that when you insert a series element into a balanced circuit, it is no longer symmetrical. Inserting a shunt element helps maintain symmetry. 1.) Could someone please elaborate on the use of the shunt inductor (L1) in the attached balun circuit? 2.) How do I choose, determine or calculate the value of the shunt element? 3.) If I were to use this same balun for matching to a dipole antenna, would ..read more

Has anyone successfully used the LoRa module in their own projects? Can you share your experience and insights ..read more

1. Energy Source Availability: Identify available energy sources such as solar, wind, vibration, thermal gradients, or ambient RF signals. Choose a technology capable of effectively capturing and converting this energy into usable electrical power. 2. Energy Density and Power Output: Assess the energy density and power output of each potential source to determine if it can meet the application’s power requirements, considering factors like sensor power consumption and duty cycle. 3. Environmental Conditions: Evaluate the environmental conditions of the remote location, including temperature ex ..read more

Reducing the output power of an ultrasonic Piezo Ceramic disc from 35 watts to 10 watts by adjusting the control board is possible but entails several considerations: Effectiveness and Performance Lowering power may compromise the effectiveness of the ultrasonic device, potentially reducing its ability to achieve desired results like cleaning or atomization. Reduced power might lead to weaker vibrations, impacting performance, especially if the device operates away from its optimal resonance frequency. Durability and Lifespan Lowering power could potentially increase the device’s lifespan by r ..read more

HI. What are the totally free software for simulating antennas? Thank you to all. John ..read more

Good morning. Can you explain to me in a simple way what the switching loss is in a MOSFET switching system? Thank you John ..read more

Hello Erdem, It’s interesting to learn about the differences in electric pole usage between countries. In many countries, wooden poles are commonly used due to their availability, cost-effectiveness, and ease of installation. However, in regions with higher load requirements like Turkey, stronger poles are necessary to support the infrastructure. In the USA and some European countries, wooden poles are reinforced and treated to withstand the required loads. Additionally, alternative materials like steel and concrete are also used for electric poles in various applications. If you’re interested ..read more

Main problem: I’m missing something about meeting torque spec. I’m primarily a digital/embedded controller designer. I have a design i’m working on thats not meeting torque specs. We chose a BLDC motor with Hall feedback, to meet an RPM and torque spec. We also have a min phase current and a peak phase current. Speed control is by PWM and it works fine. But the torque spec isnt being met. I’m missing something about how the torque spec can be influenced by the design. 1) It was my understanding that torque isn’t affected by PWM. Is that correct? 2) Torque is controlled by winding current ..read more

Microcontroller For a project like yours, the choice of a microcontroller (MCU) largely depends on the complexity of the device, the number of input/output peripherals you need (like GPIOs for the sensor, speaker, LED lights, and the green light indicator), and any additional features you might require (such as PWM outputs for LED dimming or speaker volume control). Arduino Uno is a robust choice for beginners and prototypes. It’s based on the ATmega328P and offers a good balance of GPIO pins, is easy to program, and has extensive community support. Arduino Nano or Arduino Micro could be more ..read more

You are setting yourself up to kill yourself, or at least to take an eye out. You don’t say what DC voltage you need, the voltage you would get from directly applying the mains to a bridge rectifier were typically used, for example, to supply the input to a flyback switch mode power supply, where the switching transformer provides mains isolation. The voltage would typically be around 300V DC, and the rectifier and capacitors have to be rated for that voltage plus a safety factor. I assume that you are needing a low voltage DC, since you have 25Vdc capacitors. The point about using a transform ..read more