Top HAT Alt
About the Top HAT Alt
Top HAT Alt is an open source PCB design by PetervanderMeij, published on GitHub. It is a 2-layer board measuring 65.6 × 56.5 mm, with 26 components from 24 distinct parts.
Other key parts include the TSR_1-2450. By type, the board carries 7 capacitors, 6 resistors, 5 connectors, 3 diodes, 2 transistors and 1 IC.
It belongs with the dev boards & breakouts designs in this gallery.
From the project
Raspberry Pi model train controller
A Raspberry Pi–based model train controller. Automatically runs a train between two platforms, handling acceleration/deceleration, platform stopping, track switching, and safety cutoffs — with a web dashboard for monitoring and manual control.
- Raspberry Pi 2B - Two custom PCBs for level-shifting and motor drive: - Bottom Hat: 3.3V → 5V level shifting (BC337 transistors), with a hardware SR-latch overcurrent safety circuit - Top Hat: 5V → 12V level shifting into an IRF4905 P-channel MOSFET, driving the motor directly - Sensors for slow-zone detection and platform stop detection (Platform A…
Main components on the Top HAT Alt
Top HAT Alt bill of materials (BOM)
26 components, 24 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | TSR_1-2450 | Converter_DCDC_TRACO_TSR-1_THT | U1 |
| 1 | BC337 | TO-92_Inline | Q1 |
| 1 | IRF4905 | TO-220-3_Vertical | Q2 |
| 1 | 5V | TerminalBlock_KF128_1x02_P2.54mm_Horizontal | J1 |
| 1 | CONN_01X12 Conn_01x12 | PinHeader_2x06_P2.54mm_Vertical | J2 |
| 1 | TRACK | TerminalBlock_KF128_1x02_P2.54mm_Horizontal | J3 |
| 1 | 12V DC power input | TerminalBlock_KF128_1x02_P2.54mm_Horizontal | J4 |
| 1 | Power TRACK A / B | TerminalBlock_KF128_1x02_P2.54mm_Horizontal | J5 |
| 1 | SANYOU_SRD_Form_C | Relay_SPDT_SANYOU_SRD_Series_Form_C | K1 |
| 1 | 5kΩ | Potentiometer_Runtron_RM-065_Vertical | RV1 |
| 1 | 1N4744A | D_DO-41_SOD81_P10.16mm_Horizontal | D1 |
| 1 | SS34 | D_SMA | D2 |
| 1 | 1N4004 | D_DO-41_SOD81_P10.16mm_Horizontal | D3 |
| 2 | 100 nF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C5 |
| 1 | 220μF | CP_Radial_D8.0mm_P3.50mm | C2 |
| 1 | 1 µF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C3 |
| 1 | 100μF | CP_Radial_D8.0mm_P3.50mm | C4 |
| 1 | 470 µF | CP_Radial_D8.0mm_P3.50mm | C6 |
| 1 | 0.1 µF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C7 |
| 2 | 4.7 kΩ | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R4 |
Show 4 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 1.2 kΩ | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R2 |
| 1 | 100 kΩ | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R3 |
| 1 | 22 Ω | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R5 |
| 1 | 0.2Ω 5W | R_Axial_Power_L25.0mm_W9.0mm_P30.48mm | R6 |
Top HAT Alt design files
The KiCad project lives in the PetervanderMeij/train-controller repository on GitHub; these links point at the commit this page was built from.
Top HAT Alt: common questions
How big is the Top HAT Alt?
The Top HAT Alt measures 65.6 × 56.5 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Top HAT Alt?
26 components, from 24 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 Top HAT Alt design files?
From the PetervanderMeij/train-controller 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 Top HAT Alt design in my own project?
The repository has no license, so all rights stay with PetervanderMeij. Use it as a reference, and ask the author before reusing the design.
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