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From VHDL Code to Real Hardware: Designing a Finite-State Machine

From VHDL Code to Real Hardware: Designing a Finite-State Machine

Learn how to implement finite-state machines in VHDL by creating a 4-bit binary counter. After compiling, it will run on an Altera CPLD development board connected to a custom PCB with input switches and an LED display.


The Lowdown on Wi-Fi HaLow

The Lowdown on Wi-Fi HaLow

Learn about Wi-Fi HaLow, a long-range, low-power wireless standard for IoT applications.


The Wireless Alphabet Flasher: A Radio Shack Classics Circuit Remix

The Wireless Alphabet Flasher: A Radio Shack Classics Circuit Remix

In this project, we mix the old and the new by integrating present-day BLE technology with a vintage Science Fair computer kit.


Projects Jul 21, 2024 by Don Wilcher
Moving Data Through an LTspice Parallel-Load Shift Register

Moving Data Through an LTspice Parallel-Load Shift Register

This article demonstrates the operation of an LTspice shift register and discusses details of its schematic and timing relationships.


Modifying the Operation of Digital Components in LTspice

Modifying the Operation of Digital Components in LTspice

Customizing the device parameters of LTspice's logic gates and flip-flops can help you more accurately simulate these components. This article walks through the specification process and provides some helpful tips.


An Introduction to Using Logic Gates in LTspice

An Introduction to Using Logic Gates in LTspice

This article explains how to successfully integrate logic gates into an LTspice simulation.


Understanding the Effect of Eddy Currents on the High-Frequency Behavior of Magnetic Cores

Understanding the Effect of Eddy Currents on the High-Frequency Behavior of Magnetic Cores

The formation of eddy currents can cause problems for magnetic cores at high frequencies. To mitigate these undesirable effects, we first need to understand them.


Using Complex Permeability to Characterize Magnetic Core Losses

Using Complex Permeability to Characterize Magnetic Core Losses

In this article, we use the concept of magnetic field intensity to help explain how complex permeability models the losses of a magnetic core.


How to Analyze Transmission Line Transformers: The Easy Way and the Hard Way

How to Analyze Transmission Line Transformers: The Easy Way and the Hard Way

In this article, we explore two different methods for analyzing the impedance transformation ratio of a transmission line transformer.


Shake It Off! A Digital Drawing Pad Inspired by the Iconic Etch A Sketch

Shake It Off! A Digital Drawing Pad Inspired by the Iconic Etch A Sketch

In this project, which uses the Arduino IDE, we create and demonstrate a digital drawing pad using an ESP32-based e-paper display dev board, rotary encoders for drawing control, and an accelerometer for shake detection to initiate an erase.


Designing a Battery Pack That’s Right For Your Application

Designing a Battery Pack That’s Right For Your Application

Learn how to design the battery array that best fits your system’s power requirements. This article will help you interpret battery specifications, estimate operating life, and understand the relationship between capacity, load, and environment.


Understanding Output Signal Swing in Op Amps

Understanding Output Signal Swing in Op Amps

Learn about the characteristics and limitations of an operational amplifier’s output voltage range.


Understanding Input Signal Swing in Op Amps

Understanding Input Signal Swing in Op Amps

This article, the first in a two-part series on op amp signal swing, explains the characteristics and limitations of an operational amplifier’s input voltages.


Understanding the Limits of VNA Calibration

Understanding the Limits of VNA Calibration

In this article, we compare the scope of factory and user calibration for vector network analyzers (VNAs). We then learn about the types of errors that calibration techniques can't correct.


Building a Handheld Retro Gaming Console With Local Wireless Connectivity

Building a Handheld Retro Gaming Console With Local Wireless Connectivity

In this project article, we design a handheld gaming console with wireless multiplayer functionality using ESP8266 microcontrollers. We then program a game for it with the Arduino IDE.


Introduction to VNA Calibration Techniques

Introduction to VNA Calibration Techniques

Learn the basics of how vector network analyzer (VNA) calibration techniques correct measurement errors.


Introduction to the MOSFET Common-Source Amplifier

Introduction to the MOSFET Common-Source Amplifier

In this article, we cover the basic behavior of the MOSFET common-source amplifier with different types of load.


Understanding the Significance of Dynamic Range and Spurious-Free Dynamic Range

Understanding the Significance of Dynamic Range and Spurious-Free Dynamic Range

In this article, we investigate two metrics used to characterize the performance of RF test and measurement systems.


Using a Raspberry Pi Pico to Enhance a Vintage Radio Shack Microcomputer Kit

Using a Raspberry Pi Pico to Enhance a Vintage Radio Shack Microcomputer Kit

In this project, we’ll use a Raspberry Pi Pico to build an adjustable clock with an LED display. We’ll then integrate the clock with a Radio Shack Science Fair Microcomputer Trainer programmed to function as a 7-bit binary counter.


Projects Feb 11, 2024 by Don Wilcher
Understanding the Inner Workings of Vector Network Analyzers

Understanding the Inner Workings of Vector Network Analyzers

In this article, we explore how the signal source and receivers of a VNA enable its function.