RTB D21
About the RTB D21 PCB
RTB D21 is an open source PCB design by git4dcc, published on GitHub under the Apache-2.0 license. It is a 6-layer board measuring 15.2 × 9.5 mm, with 48 components from 23 distinct parts.
Other key parts include the AVR64DD28-I_STX, NCP730BMT330TBG and DRV8231ADSGR. By type, the board carries 19 resistors, 9 capacitors, 7 diodes, 6 transistors, 4 connectors and 3 ICs.
It belongs with the robotics & motion designs in this gallery.
From the project
DCC / Railcom decoder (Next18, double sided)
My Homebrew D21 decoder is a double sided mobile decoder with Next18 (NEM-662) connector. The decoder is designed to integrate into the RTB digital control infrastructure.
- RTBD12 - custom (Fleischmann V100) - RTBD13 - custom (Minitrix coach) - RTBD15 - custom (Minitrix V160) - RTBD16 - NEM651 - RTBD20 - NEM651 - RTBD22 - Plux16 - RTB_D23 - NEM652
:yellowcircle: Requires my Kicad project library RTBSamacSys in the same directory tree.
Main components on the RTB D21
RTB D21 bill of materials (BOM)
48 components, 23 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | AVR64DD28-I_STX | QFN-28-1EP_4x4mm_P0.4mm_EP2.3x2.3mm | IC1 |
| 1 | NCP730BMT330TBG | WSON-6-1EP_2x2mm_P0.65mm_EP1x1.6mm_ThermalVias | IC2 |
| 1 | DRV8231ADSGR | SON50P200X200X80-9N | IC3 |
| 1 | BC847BDW1 | SOT-666 | Q1 |
| 1 | BC857BDW1 | SOT-666 | Q2 |
| 4 | PMZB200UNEYL | Diodes_DFN1006-3 | Q3, Q4, Q5, Q6 |
| 3 | pad | Solder 0.8 x 0.5 | J1, J2, J3 |
| 1 | NEXT18 Next18 | AXK6F16347YG | J10 |
| 1 | LED | LED_0402_1005Metric | D1 |
| 6 | NSR20F40NXT5G | NSR20F40NXT5G | D2, D3, D4, D5, D6, D7 |
| 4 | 10U/6.3V 10u/6.3V | C_0402_1005Metric | C1, C5, C8, C9 |
| 3 | 10U/25V 10u/25V | C_0603_1608Metric | C2, C4, C7 |
| 1 | 1U/50V 1u/50V | C_0402_1005Metric | C6 |
| 1 | 100N/50V 100n/50V | C_0402_1005Metric | C10 |
| 4 | 33K 33k | R_0402_1005Metric | R1, R2, R15, R17 |
| 1 | 3.3K 3.3k | R_0402_1005Metric | R3 |
| 1 | 22 | R_0402_1005Metric | R4 |
| 4 | 10K 10k | R_0402_1005Metric | R5, R6, R11, R12 |
| 3 | 220K 220k | R_0402_1005Metric | R7, R8, R14 |
| 2 | 9.1K 9.1k | R_0402_1005Metric | R9, R10 |
Show 3 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 1k | R_0402_1005Metric | R13 |
| 2 | 12K 12k | R_0402_1005Metric | R16, R18 |
| 1 | 1 | R_0402_1005Metric | R19 |
RTB D21 design files
The KiCad project lives in the git4dcc/RTB_D21 repository on GitHub; these links point at the commit this page was built from.
- LayoutD21.kicad_pcb
- SchematicD21.kicad_sch
- BOMproduction/bom.csv
RTB D21: common questions
How big is the RTB D21 PCB?
The RTB D21 measures 15.2 × 9.5 mm, has 6 copper layers and is 0.8 mm thick.
How many components are on the RTB D21?
48 components, from 23 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the RTB D21 design files?
From the git4dcc/RTB_D21 repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the RTB D21 design in my own project?
Yes, under the terms of its Apache-2.0 license, which git4dcc chose for the repository.
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