HardLabs

RTB D24

git4dcc·RTB_D24

RTB D24 PCB layout, top view — open source AVR/Arduino board by git4dcc

About the RTB D24 PCB

RTB D24 is an open source AVR/Arduino PCB design by git4dcc, published on GitHub under the Apache-2.0 license. It is a 6-layer board measuring 17 × 10.9 mm, with 52 components from 29 distinct parts.

Its main chip is the AVR-64DA32, from the AVR/Arduino family. Other key parts include the DRV8231ADSGR and NCP730BMT500TBG. By type, the board carries 25 resistors, 9 connectors, 6 transistors, 6 capacitors, 3 ICs and 3 diodes.

From the project

DCC / Railcom decoder (NEM651, single sided), WS28xx

My Homebrew D24 is a single-sided DIY mobile decoder featuring a NEM-651 connector. While it shares the exact same dimensions as the D16, it offers additional AUX channels and supports WS28xx LED connections. It is fully designed for integration into the RTB digital control ecosystem.

- RTBD16 - NEM651 - RTBD20 - NEM651 - RTBD21 - Next18 - RTBD22 - Plux16 - RTB_D23 - NEM652

RTB D24, from the project README
From the project README

Main components on the RTB D24

DRV8231ADSGRNCP730BMT500TBGAVR-64DA32

RTB D24 bill of materials (BOM)

52 components, 29 distinct parts.

QtyPartRefs
1
DRV8231ADSGR
IC1
1
NCP730BMT500TBG
IC2
1
AVR-64DA32
U1
1
BC847BDW1
Q1
1
PMZB200UNEYL
Q2
3
PMZB200UNEYL
Q3, Q5, Q6
1
BC857BDW1
Q4
5
Conn_01x01
J1, J3, J4, J5, J6
1
NEM651
J2
1
WS28xx data
J7
1
WS28xx GND
J8
1
WS28xx power
J9
1
LED pink
D1
1
NSR20F40NXT5G
D2
1
BAS3007ARPPE6327HTSA1
D3
3
10u/6.3V
C1, C3, C13
1
1u/35V
C4
1
1u
C6
1
22u/25V
C7
4
4.7k
R1, R4, R5, R6
Show 9 more
QtyPartRefs
1
3.3k
R2
1
22
R3
4
33k
R7, R8, R10, R12
2
2.2
R9, R22
6
10k
R11, R13, R15, R18, R19, R20
1
100
R14
3
220k
R17, R34, R35
1
1k
R21
2
9.1k
R36, R37

RTB D24 design files

The KiCad project lives in the git4dcc/RTB_D24 repository on GitHub; these links point at the commit this page was built from.

RTB D24: common questions

What microcontroller does the RTB D24 use?

The RTB D24 is built around the AVR-64DA32, from the AVR/Arduino family.

How big is the RTB D24 PCB?

The RTB D24 measures 17 × 10.9 mm, has 6 copper layers and is 0.8 mm thick.

How many components are on the RTB D24?

52 components, from 29 distinct parts. The full bill of materials is listed on this page.

Where can I download the RTB D24 design files?

From the git4dcc/RTB_D24 repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the RTB D24 design in my own project?

Yes, under the terms of its Apache-2.0 license, which git4dcc chose for the repository.

Can I test firmware for the RTB D24 without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.

Similar boards