DPL Classic & D-CBI (or CBI+)

The Data Port Logics Classic is the 2025 evolution of the original R-Series DPL.

It is based on a robust Maxim7219 LED driver chip and controlled by an onboard Arduino Nano.

Due to the fact that even today — more than a decade later — outdated DPL versions are still being sold, which unnecessarily rely on an external Arduino board for operation, I decided to develop the DPL Classic.
This new design integrates the Arduino Nano directly on the back of the unit, eliminating the need for additional external boards, messy wiring, and fragile setups.
Uploading your own firmware or updating sketches is now straightforward: simply connect via USB — no FTDI adapter or special programming hardware is required.

Compared to my DPL-VU model, the DPL Classic deliberately omits the digital LED section in the left middle segment.
This provides flexibility, allowing users to install their own modules or custom features in that area without interference from pre-installed digital LEDs.

Another key improvement over the original R-Series DPL is the inclusion of three dedicated 3-pin connector ports.
These ports allow for easy expansion and integration of D-DBI, LDPL and CSL, making the DPL Classic even more versatile.
The classic CBI can be connected via the traditional 5-pin header.

In summary, the DPL Classic combines modern integration, simplified user interaction, and expansion capability — while staying true to the original R-Series DPL spirit.

• Everything on 1 pcb – Arduino, terminals for power and voltage sensor are integrated in the DPL – even added I2C & serial breakout
• Terminals for the other Printed Droid Body Lights
• Better tracing
• Improved LED alignment
• Possibility to use the digital CBI version

The Digital Charging Bay Indicator is an enhanced version of the classic CBI.

The D-CBI is a full digital version of the classic CBI. It also has the 3 additional voltage sensor Leds direct on the pcb.
It’s possible to break them away and remove them or to place somewhere else connected via wires.

If you want to connect it to a classic DPL you need to modify the code!

The Charging Bay Indicators+ are an enhanced version of the classic CBI.

The CBI+ is an “analog” 3mm Led PCB. It has the 3 additional voltage sensor Leds direct on the pcb.
It’s possible to break them away and place somewhere else connected via wires.
The CBI+ can be used with any DPL version out there.

This comes as a Kit (2 soldered PCBs, Arduino & cable)
Or choose from the options.

Sketch, manual & more information:
https://www.printed-droid.com/kb/data-port-logics-vu-dpl-vu/
https://www.printed-droid.com/kb/digital-charging-bay-indicators-d-cbi/