EEZ Bench Box 3

by Envox

Modular, open-source test & measurement chassis

Jan 05, 2020

More Fun with MicroPython & Post-Campaign Availability

New graph viewer features, a video demonstration of curve tracing with MicroPython, thoughts on support for various BB3 models, and post-campaign availability. Read the full update.

Dec 31, 2019

Thank You & Protection Mechanisms

Martin and I want to thank all of the backers who have helped us reach our funding goal. We believe that BB3 will meet your expectations. In this update we’d like to present various protection mechanisms that are important for every sourcing instrument, including EEZ BB3 when it's equipped with power modules. Read the full update.

Dec 25, 2019

IoT infrastructure features and OSHWA certification

EEZ BB3's IoT functionality began with SCPI support. We then gave EEZ Studio the ability to serve as a cross-platform automation hub for SCPI-enabled instruments connected over Ethernet or through serial-over-USB. Finally, to round out this IoT feature set, we have added MQTT support. Finally, we are happy to announce that EEZ BB3 is now OSHWA-certified as open hardware. Read the full update.

Dec 19, 2019

MicroPython Arrives on BB3

We now have a functional implementation of MicroPython running on the STM32F7 MCU at the heart of BB3. This update describes how you can run MicroPython on your BB3 and includes a video demonstration of a basic diode tester. Read the full update.

Dec 16, 2019

Power Output Coupling & Tracking. (And the Announcement of Our First Stretch Goal!)

The EEZ BB3 chassis comes with a backplane that distributes data and control signals. That backplane also provides four relays that support easy, firmware-level coupling of power outputs without the need for external wiring. This update includes a video that describes BB3's power output coupling functionality. It also announce our campaign's first stretch goal! Read the full update.

Dec 09, 2019

DCP405 Module - Advanced Features

This update includes a short video that introduces advanced features of the DCP405 module that are not present in the basic DCP405B. That include remote sense, a down-programmer, remote programming, and fast OVP. Read the full update.

Dec 02, 2019

Thank You & Data Logging Automation

Support for this campaign has been incredible. Thank you! Keep reading to learn more about, and to see a demonstration of, EEZ BB3's data logging features. Read the full update.

Nov 19, 2019

Our Campaign is Live!

It's been a long time since we decided to make the H24005 more flexible and more powerful by giving it a larger screen, an upgraded MCU, and a modular design built around a DIB v1.0 backplane capable of receiving up to three DC power source modules. We are confident that BB3 will live up to that promise. Read the full update.

Nov 18, 2019

The Final Countdown Has Begun!

The EEZ BB3 campaign is set to launch tomorrow, November 19th, at 3pm PST. And we will be offering an Early Bird discount on Two-Channel BB3s with advanced power features, so come have a look! Read the full update.

$114,019 raised

of $85,000 goal

134% Funded! Order Below

Product Choices


Support EEZ Studio Development

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


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.


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.



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

Components & Hardware Sourcing



Metal Fabrication

TME Electronic Components

Components & Hardware Sourcing

Jedinstvo - Kartonaža d.o.o.


Printing & Packaging


PCB Assembly

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