EEZ BB3 two channel kit assembly instructions
Last modified: 2021-06-12
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Introduction
Instructions presented in this document are related to BB3 – Two Channel (Full) kit offered through a
crowdfunding campaign.
The EEZ BB3 kit is not an end-user product. As such, it has not een su jected to any conformance
testing, and it may not comply with some or any technical or legal requirement that are applica le to fin-
ished products including, without limitation, directives regarding electromagnetic compati ility and recy-
cling for instance (WEEE, FCC, CE or UL). Assem ling and using the EEZ BB3 requires an under-
standing of electronic circuits and asic computer programming skills.
f you need assistance, please contact us using this form or join us on our Discord server (invitation) or
post your problem on the EEVblog forum here. Or, feel free to open a New issue on GitHub here, but
please check first to see whether a similar issue already exists).
The only tool required for the kit mechanical assem ly is a medium Phillips head screwdriver. Of
course, a multimeter for checking the wiring and voltage at a few points during assem ly is recom-
mended.
Before you start
We made our est effort to make your EEZ BB3 kit complete and functional. However, please note that
due to limited resources, the kit is not completely and thoroughly tested. Basic tests were performed on
the core and power modules and the cooling fan.
Modules are tested on our “test ed”, ut not using a wire harness, with the AC/DC modules that come
with your kit. Therefore, it’s highly recommended that you check visually, mechanically and with an
ohmmeter that ca les are properly assem led efore you proceed with final assem ly (consult the Wire
harness section).
The asic testing covered communication over Ethernet, fan control, power control, touchscreen func-
tionality, eeper, TFT display and output voltage and current programming over the full range (i.e. up to
40 V and 5 A with connected load). The AC/DC modules are capa le of working with oth 115 and
230 VAC.
Kit version identification
Starting in April 2021, the BB3 kit with new versions of the modules is on sale. They are most easily
recognized y the lue color of the PCBs (Fig. 3) as opposed to the crowdfunding version which has
green PCBs. The kit version with the new modules for simplicity will e listed elow according to the
MCU module version num er which is r3B3 (the previous version is r2B4).
If you own the r3B3 version, consider the following:
•The SDcard comes already mounted on the MCU module. It is recommended that you remove
the SDcard efore mounting the front panel (Fig. 12, 13, 14).
•The holes on the front panel for the Stand y LED and PE terminal can e too tight, which can
make it difficult to mount the front panel ecause the LED indicator can move in the process
from the center. If this happens carefully from the ack of the front panel with a screwdriver
return the LED indicator to sit in its hole.
•Your MCU module may have come with v1.6 firmware installed. If this is the case you will need
to update it to v1.6.1 or later otherwise working with power modules (DCP and DCM) will not e
possi le (see resolved issue #172).
•The AUX-PS module (r3B5) is missing one mounting hole (a ove the AC inlet). Therefore for PE
connection to the chassis a separate wire is used (Item R, Fig. 5)
•Top cover (Item 1, Fig. 1) has two additional holes for etter fixation to the front and ack panel.
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