Massimo Marucchi’s ZRLC interface
Massimo Marucchi designed and built his own interface for impedance measurements with Visual Analyser. His article documents this independent implementation and is presented here as a community contribution.
This is a separate project from the interface published in Nuova Elettronica. The article is not the official documentation for that project or an update to it.
WA7ZVY: a redesigned PCB for the USB impedance meter
A build of the Nuova Elettronica impedance meter using a completely redesigned printed circuit board. The builder shared the project files, PCB CAM files and photographs of the assembled instrument.
The marking WA7ZVY appears on the PCB and front panel and is used here to identify the contribution. The name of the builder has not been confirmed. This is an independent implementation based on the Nuova Elettronica project.
The complete project includes a PDF schematic, schematic and PCB design files, CAM files, a panel drawing and photographs. The second archive contains copper, silkscreen and solder-mask Gerber files and a drill file. Both archives are provided as received.
Giorgio Vasciaveo: ZRLC interface for external audio converters
Giorgio Vasciaveo shared his own interface for ZRLC measurements with Visual Analyser, developed from the principles of the Nuova Elettronica LX1746 meter. The design includes an OPA548T power stage and NE5532AP sensing stages.
According to the author, the circuit is intended for Behringer UFO202 and U-PHORIA UMC202HD converters and provides manual selection of reference resistors from 1 Ω to 1 MΩ. These values describe the proposed hardware resistor bank: they do not establish a verified measurement range or the availability of all corresponding settings in VA. Compatibility, configuration and performance require checks on the individual build.
The author made the material freely available to the community. The package includes the impedance meter schematic, Gerber files for its PCB, the power supply schematic and component list, and four design images. Power supply Gerber files are not included.
The Nuova Elettronica project
For the USB ZRLC project published in Nuova Elettronica, see the hardware section and its article, now also available in an illustrated English translation.