EEZ Bench Box 3

by Envox

Modular, open-source test & measurement chassis

View all updates Feb 05, 2020

First Fulfillment Update

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

It’s been four weeks since our campaign ended, and it’s high time for the first update on our progress toward fulfillment. Below is an overview of what has happened since the campaign. In addition, you should begin to see new updates more frequently.

  1. We contacted our chosen PCBA manufacturer with the final BOMs to get information about manufacturing costs and a delivery estimate. Their response was neither timely nor satisfactory, so we closed the deal with other company that participated in initial biding. Test batch production (i.e. component sourcing, PCB manufacturing, pick & place programming, etc.) started last Friday.
  2. We promptly informed our enclosure manufacturer about changes to the front and rear panels, and they sent us a new prototype. The Ethernet socket has now been moved from the front to the rear panel, and the BOOT0 switch needed for master MCU firmware download has been moved from the AUX-PS module to the MCU module.
  3. We contacted various vendors about enclosure nuts & bolts, AC/DC converter modules, TFT displays, etc. Purchase orders were sent and money transfers were made. During that process, we learned that our source for AC/DC converters can only provide them in the required quantities if they are manufactured on demand. This puts us in the position of having to announce our first delay, though it should only push us back by about two weeks. We'll keep you informed of any changes, but we have encountered no other delays so far.

Our enclosure manufacturer (Varisom) sent us a few pictures from production:

Parts that will be used to assemble the EEZ BB3 enclosure



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

Components & Hardware Sourcing

Jedinstvo - Kartona┼ża d.o.o.


Printing & Packaging

Drives and Motors d.o.o.


PCB & PCBA Manufacturing

See Also

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