Latest Schematic Design Projects

For this project, I built a handheld resistor color code calculator and ohmmeter using the ATmega328 microcontroller and…

For this project, I built a handheld resistor color code calculator and ohmmeter using the ATmega328 microcontroller and a 1.8-inch color LCD display.

This project covers two fascinating and useful circuit design techniques—the Burton Transform and Dualling—that allow…

This project covers two fascinating and useful circuit design techniques—the Burton Transform and Dualling—that allow us to transform a passive network into an active network while building an audio noise filter.

This project will cover the design, construction, and testing of an analog filter meeting the ITU-R BS.468-4…

This project will cover the design, construction, and testing of an analog filter meeting the ITU-R BS.468-4 specification, which aims to evaluate the disturbing effects of noise on audio broadcast signals.

In this project, we design an A-weighted analog noise filter for audio frequencies. The filter provides a variable…

In this project, we design an A-weighted analog noise filter for audio frequencies. The filter provides a variable frequency gain response that is similar to that of our hearing.

In this hands-on project, we will update a 1980s version of a one-shot (monostable multivibrator) circuit by giving it a…

In this hands-on project, we will update a 1980s version of a one-shot (monostable multivibrator) circuit by giving it a modern, colorful output while also examining the circuit's operation.

This project demonstrates the design and operation of a root-mean-squared (RMS) detector for inclusion in a wideband…

This project demonstrates the design and operation of a root-mean-squared (RMS) detector for inclusion in a wideband voltmeter. The RMS detector is useful for measuring certain signal types, including noise, since it provides an indication of the energy in a signal.

This article demonstrates the creation of an inductive switch cabinet lock that can detect the movement of a conductive…

This article demonstrates the creation of an inductive switch cabinet lock that can detect the movement of a conductive target. The purpose is to create a door that cannot be opened without triggering an alarm.

We’ll discuss some important layout and manufacturing concepts as we look at the PCB for the Robot Control Board.

We’ll discuss some important layout and manufacturing concepts as we look at the PCB for the Robot Control Board.

Over-voltage and over-current protection circuit for use with the C-BISCUIT platform's main computer, the Wandboard.

Over-voltage and over-current protection circuit for use with the C-BISCUIT platform's main computer, the Wandboard.

Building on skills developed in the introductory KiCad tutorial, this article will focus on creating custom parts and…

Building on skills developed in the introductory KiCad tutorial, this article will focus on creating custom parts and adding them to a local library, expanding the default libraries to include community repositories, and contributing parts back into the open source ecosystem. The end product will be a MAX31855 K-type thermocouple amplifier which can be used for a huge array of temperature sensing projects.