EEZ Bench Box 3

by Envox

Modular, open-source test & measurement chassis

View all updates Jan 05, 2020

More Fun with MicroPython & Post-Campaign Availability

by Denis Kotlar (a.k.a. prasimix)

We are slowly realizing just how many new possibilities BB3’s support for MicroPython scripting has opened up. After our first demo, in which we plotted a simple graph, we continued to work on the graph viewer and gave it the ability to display multiple curves at once. This feature makes BB3 a great tool for semiconductor testing that requires a so-called curve tracer. The video below shows how MicroPython can be used to automate the measurement of N-ch MOSFET and NPN BJT characteristics using two DCP405 power modules. The scripts that make this possible not only demonstrate how you can control power modules using the almost 380 SCPI commands now supported by BB3, they also provide examples that you can adapt for various other test scenarios.

Post-Campaign Availability

Since there are just a couple of days before the campaign comes to an end, we’d like to comment on the breakdown of support provided for the various pledge levels we made available. It seems that we received a lot of backing for the two extremes: for the Enclosure & Bare Boards, at the inexpensive end of the spectrum, and for the Two Channel (Full) at the other end. This information will help us optimize future planning and production. Accordingly, we would like to announce that the DCP405B peripheral power module (the cheaper version of the DCP405) will no longer be available after the campaign ends. Consequently, that module will be replaced by the full-featured DCP405 in all kits that currently include it, and prices will be updated accordingly. Also, please note that the price of the Enclosure & Bare Boards will increase slightly.

Thanks again for your support. Now let’s see if we can reach that stretch goal!



About the Author

Denis Kotlar (a.k.a. prasimix)


$154,699 raised

of $85,000 goal

181% Funded! Order Below

Product Choices


Support EEZ Studio Development

EEZ Studio is a cross-platform free and open source BB3 development environment but also attractive SCPI controller that is used to access many T&M devices using SCPI commands. Its development and support cost us money and your donation will help us to keep it alive and kicking.


BB3 - Starter (Without Peripheral Modules)

A BB3 enclosure kit without bare PCBs but with fully-assembled core modules (AUX-PS, MCU STM32F7, and BP3C DIB 3-slot backplane). The Starter provides an environment for experimenters who are willing to build their own modules or who want a specific BB3 configuration (such as a six-channel BB3).


BB3 - Two Channel (Full)

A BB3 starter kit and two full-featured DCP405 single-channel (40 V, 5 A) peripheral power modules, including an AC/DC power module for each. A two-channel programmable power source with advanced features: remote sensing, remote programming, a down-programmer, and additional OVP (with crowbar).


BB3 - Four Channel (Full)

A BB3 starter kit, two full-featured DCP405 single-channel (40 V, 5 A) peripheral power modules, and one dual-channel DCM220 peripheral power module. Includes all three necessary AC/DC modules. This is the two-channel full kit, expanded to include two additional programmable power sources.


DCP405 One Channel Module (Full)

A full-featured DCP405 single-channel (40 V, 5 A) peripheral power module with remote sensing, remote programming, a down-programmer and crowbar OVP. Includes an AC/DC module.


DCM220 Two Channel Module

A DCM220 dual-channel (2 x 20 V, 4 A) peripheral power module and its AC/DC module.


Cable Set

Two pairs of high quality, silicone, color marked (black-red), 1 m connecting cables; a pair of clip-on probes; and a pair of insulated crocodile clips.


BB3 Enclosure & Bare Boards

A BB3 enclosure kit with a wire harness, nuts and bolts for the three core modules, a 4.3" TFT touchscreen display, an encoder knob, and an 80 mm fan. Includes a set of bare PCBs for building the three core modules (AUX-PS, MCU STM32F7, and BP3C DIB 3-slot backplane) as well as PCBs for building one DCM220 two-channel peripheral power module and two single-channel peripheral power modules (either the DCP405 or the DCP405B, as they can be assembled using the same PCB). Suitable for builders with the necessary skill, time, and patience.



Envox d.o.o. is home of the Envox Experimental Zone (EEZ), an open source initiative to bridge the gap between DIY / hobbyist / educational / low-budget and professional / commercial test and measurement solutions.

Denis Kotlar (a.k.a. prasimix)

Martin Vladic

Mouser Electronics

Component Provider

TME Electronic Components

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Jedinstvo - Kartonaža d.o.o.


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