2 layers231.1 × 106.7 mm
2 layers150 × 77 mm
Power Switching
ttstam/Makerspace_Access_ControlMakerspace access control hardware - to handle badge in onto tools. Backends into Home Assistant.
- Size
- 150 × 77 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 42
- Nets
- 30
- Pads
- 138
- Tracks, vias
- 224, 6
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 22 Sep 2026
- Updated
- 22 Sep 2026
Overview
Power Switching is an open-source printed circuit board by ttstam, from the ttstam/Makerspace_Access_Control repository on GitHub. It is a 2-layer board of 150 × 77 mm with 42 parts on 30 nets, routed with 224 tracks and 6 vias.
It is built around the LM393, CST206-1T and RT314F12. Its parts include 13 resistors, 6 ICs, 5 connectors, 3 diodes and 3 transistors.
Main components
3
LM393
SOP-8-16V~16V 0℃~+70℃ 2 2.5mA 250nA 2V~36V 36V 5mV 5nA Fail-safe function Open-drain SOP-8 Comparators ROHSMSKSEMIComparatorsCST206-1T
插件100:1 110A 2000V·us 20kHz~200kHz 580mΩ Straight 插件 Current Sense Transformers ROHSTriad MagneticsCurrent Sense Transformers
RT314F12
插件-40℃~+85℃ 10ms 10ms 12V 16A 400V@AC AgNi Dual Coil One set changeover: 1C (SPDT - changeover) 插件 Magnetic Latching Relays ROHSTE ConnectivityMagnetic Latching Relays
Parts
42| Qty | Value | Footprint | References |
|---|---|---|---|
| 13 | R_US | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13 |
| 3 | 2N7000 | Package_TO_SOT_THT:TO-92_Inline | Q1, Q2, Q3 |
| 3 | TestPoint | TestPoint:TestPoint_Loop_D2.50mm_Drill1.0mm_LowProfile | TP1, TP2, TP3 |
| 2 | 1N4148 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D1, D2 |
| 2 | MountingHole_3.2mm_M3_ISO14580_Pad | MountingHole:MountingHole_3.2mm_M3_ISO14580_Pad | CONTACTOR, J5 |
| 2 | PC817 | Package_DIP:DIP-4_W7.62mm | U2, U3 |
| 1 | 12V IN | TerminalBlock_Phoenix:TerminalBlock_Phoenix_MKDS-1,5-2-5.08_1x02_P5.08mm_Horizontal | J3 |
| 1 | 1N4007 | Diode_THT:D_DO-41_SOD81_P12.70mm_Horizontal | D3 |
| 1 | 4069 | Package_DIP:DIP-14_W7.62mm | U7 |
| 1 | 4071 | Package_DIP:DIP-14_W7.62mm | U6 |
| 1 | 4081 | Package_DIP:DIP-14_W7.62mm | U5 |
| 1 | 436500328 | Project_footprints:CONN_SD-43650-010_03_MOL | J4 |
| 1 | AC Contactor | TerminalBlock_Phoenix:TerminalBlock_Phoenix_MKDS-1,5-2-5.08_1x02_P5.08mm_Horizontal | J1 |
| 1 | C | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C2 |
| 1 | CST206-1T | Project_footprints:CST206-1T | T1 |
| 1 | C_Polarized_US | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C1 |
| 1 | Interlock Bus | TerminalBlock_Phoenix:TerminalBlock_Phoenix_MKDS-1,5-2-5.08_1x02_P5.08mm_Horizontal | J5 |
| 1 | LM393 | Package_DIP:DIP-8_W7.62mm | U1 |
| 1 | Local Disconnect | TerminalBlock_Phoenix:TerminalBlock_Phoenix_MKDS-1,5-2-5.08_1x02_P5.08mm_Horizontal | J6 |
| 1 | RT314F12 | Project_footprints:TE_8-1393239-7 | K1 |
| 1 | Threshold Adjust | Project_footprints:POT_3386F | RV1 |
The 40 most common of 42 parts.
Questions
How big is the Power Switching PCB?
It measures 150 × 77 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Power Switching use?
42 parts, built around the LM393, CST206-1T and RT314F12. 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 Power Switching KiCad files?
From the ttstam/Makerspace_Access_Control repository on GitHub, at the commit this page was made from: the board is Power_Switching/Power_Switching.kicad_pcb and its schematic Power_Switching/Power_Switching.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Power Switching design in my own project?
Its repository states no licence, so its author keeps all rights: ask ttstam before reusing the design.
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