Currenari Lab
Hand-built electronics and firmware
Projects are developed, tested, and documented as either complete systems or standalone hardware components, ranging from early prototyping through to finished devices.
Technical Coverage
- Circuit prototyping and experimental builds
- Standalone PCB and development board design
- Firmware design and behaviour
- Embedded hardware systems
- PCB design and production
Published Work
Published Work → Spectrum One
ESP32 WiFi Activity Monitor
Spectrum One · From Breadboard Prototype to Custom PCB
ESP32 WiFi Activity Monitor documents the complete build of Spectrum One, a standalone embedded device designed to observe WiFi activity and display it locally using an LED bar and a character LCD.The book follows the system from an initial breadboard prototype through to a finished PCB, treating hardware layout, firmware behaviour, and physical constraints as one coherent design. The firmware is written in C using ESP-IDF and runs entirely offline.All firmware source code and PCB design files are published as open source and are referenced throughout the book.Available fromThis book is available on major publishing platforms, including:Amazon, Google Books, Apple Books, and other international ebook retailers.Print and digital editions are distributed depending on platform availability.
About
Hand-made and etched my first PCB in 1986
Currenari LabCurrenari Lab is an independent electronics lab and publishing imprint.Projects are developed as complete systems, moving from early breadboard prototypes to finished hardware, PCB designs, and firmware. The focus is on systems that can be inspected, repaired, and understood.Open source and open hardware work is shared publicly.
About the AuthorIndependent electronics developer and technical author.The work focuses on documenting real hardware builds and embedded systems with an emphasis on clarity, repairability, and long-term reference value.Published books and commercial editions support continued development.All work is published under the Currenari label.
The author writes under the pen name Jay J. Reszka.
Jay J. Reszka
Licensing
Currenari Lab projects operate under multiple licenses.Each project or repository clearly defines its applicable licenses in an explicit LICENSE file.
Licensing is project-specific and applies only to the materials contained within each repository.Books and commercial publications are not distributed through project repositories and are therefore not licensed via repository LICENSE files.Summary of license categories used:Books and commercial publications
Proprietary. All rights reserved.Repository documentation
Creative Commons Attribution 4.0 International (CC BY 4.0)Source code and binaries
MIT LicenseHardware designs, schematics, and PCB files
CERN Open Hardware Licence Version 2 – Strongly Reciprocal (CERN-OHL-S-2.0)Licensing of one category does not grant rights to any other category.
Always refer to the LICENSE file in each project repository for authoritative terms.