2 layers25.4 × 53.3 mm
EasyCT
JeppeKlitgaard/EasyCT
Convenient current transformer PCB with support for common transformers
43 partsMIT
2 layers18.8 × 42 mm
Block detector
mwinters-stuff/DCC-Block-DetectorSimple DCC Block Detector
- Size
- 18.8 × 42 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 8
- Nets
- 5
- Pads
- 19
- Tracks, vias
- 46, 0
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 25 Nov 2024
- Updated
- 1 Jul 2025
Overview
Block detector is an open-source printed circuit board by mwinters-stuff, from the mwinters-stuff/DCC-Block-Detector repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 18.8 × 42 mm with 8 parts on 5 nets, routed with 46 tracks and 0 vias.
It is built around the BC337 and ZMCT103C. Its parts include 2 resistors, 2 transistors, 1 capacitor, 1 diode and 1 connector.
Main components
2README
README.mdDCC Block Detector
Simple DCC Block Detector
Using the schematic from https://sites.google.com/site/gregthrottles/pulse-trans which is based from someone called "Rob Paisley" and extended by myself to add a second transistor and pull-up resistors. Fed of ~5 Volts you get approx 4.5v on the signal line.
Schematic
Render
Parts
8| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 10K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R1, R2 |
| 2 | BC337 | Package_TO_SOT_THT:TO-92_Inline | Q1, Q2 |
| 1 | 1N4001 | Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal | D1 |
| 1 | 1uF | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C1 |
| 1 | ZMCT103C | Transformer_THT:Transformer_Zeming_ZMCT103C | TR1 |
| 1 | ~ | KiCAD-Connector_KF301:KF301-3P | J1 |
Questions
How big is the Block detector PCB?
It measures 18.8 × 42 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Block detector use?
8 parts, built around the BC337 and ZMCT103C. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Block detector KiCad files?
From the mwinters-stuff/DCC-Block-Detector repository on GitHub, at the commit this page was made from: the board is block-detector.kicad_pcb and its schematic block-detector.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Block detector design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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