4 layers35.7 × 35.7 mm
Opendocimeter v2
georges-mars/Docimeter
A wearable redesign of the OpenDosimeter platform focused on compact electronics, custom PCB integration, embedded firmware, and practical radiation-monitoring applications.
133 parts
2 layers96.1 × 57.1 mm
- Size
- 96.1 × 57.1 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 27
- Nets
- 19
- Pads
- 74
- Tracks, vias
- 242, 56
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 26 Oct 2026
- Updated
- 26 Oct 2026
Overview
TIME CAP is an open-source printed circuit board by NotARealDevOrDesigner, from the NotARealDevOrDesigner/time_cap_pcb repository on GitHub. It is a 2-layer board of 96.1 × 57.1 mm with 27 parts on 19 nets, routed with 242 tracks and 56 vias.
It is built around the MCP1700T-3002E/TT(MS), BSS138 and DMG2305UX, with the SMD-7525-3627-16Ω among its other parts. Its parts include 7 ICs, 4 capacitors, 4 resistors, 2 transistors and 2 connectors. It belongs with the SAM D and SAM boards of this library.
Main components
4
MCP1700T-3002E/TT(MS)
SOT-23-40℃~+125℃@(Tj) 1 120uVrms 180mV@(300mA) 2uA 300mA 3V 5.5V 80dB@(100Hz) Fixed Over Current Protection、Over Temperature Protection Positive SOT-23 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSMSKSEMIVoltage Regulators - Linear, Low Drop Out (LDO) RegulatorsBSS138
SOT-23-55℃~+150℃ 1 N-channel 1.1Ω@10V、1.2Ω@4.5V 1.2V 1.7nC@10V 17.5pF 340mA 350mW 50V 6.5pF N-Channel SOT-23 MOSFETs ROHShongjiachengMOSFETsDMG2305UX
SOT-23-55℃~+150℃ 1 P-Channel 1.7W 190pF 1V 20V 4.1A 52mΩ@4.5V 7.8nC 740pF P-Channel SOT-23 MOSFETs ROHSTECH PUBLICMOSFETs
SMD-7525-3627-16Ω
SMD,7.5x7.5mm-40℃~+110℃ 120mA 2.5mm 2.7kHz 3.6V 3.6V 7.5mm 7.5mm 80dB Electromagnetic Passive (Externally Driven) SMD SMD,7.5x7.5mm Buzzers ROHSS&SBuzzers
Parts
27| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 1uF (105) ±10% 25V X7R | footprints:C29936_C0603 | C3, C4 |
| 2 | 4.7kΩ | PCM_JLCPCB:R_0603 | R6, R7 |
| 2 | ~ | YUWEI_Lib:Single Pad | U6, U7 |
| 1 | 100kΩ | PCM_JLCPCB:R_0603 | R5 |
| 1 | 100nF | PCM_JLCPCB:C_0603 | C7 |
| 1 | 100nF | PCM_JLCPCB:C_0402 | C2 |
| 1 | 1MΩ | PCM_JLCPCB:R_0603 | R1 |
| 1 | BSS138 | PCM_JLCPCB:Q_SOT-23 | Q2 |
| 1 | Conn_01x06_Pin | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical_SMD_Pin1Right | J1 |
| 1 | Conn_01x09_Pin | YUWEI_Lib:Display Connector | J2 |
| 1 | D2 | TestPoint:TestPoint_Pad_D2.0mm | TP6 |
| 1 | DMG2305UX | lcsc_footprints:C2940629_SOT-23-3_L2_9-W1_3-P0_95-LS2_4-BR-1 | Q1 |
| 1 | GND | TestPoint:TestPoint_Pad_D2.0mm | TP4 |
| 1 | LOGO | YUWEI_Lib:t7_white | G*** |
| 1 | LOGO | YUWEI_Lib:front_silk3 | G*** |
| 1 | LOGO | YUWEI_Lib:t7_gold | G*** |
| 1 | MCP1700T-3002E/TT | footprints:C62244_SOT-23-3_L2_9-W1_3-P1_90-LS2_4-BR | U3 |
| 1 | SMD-7525-3627-16Ω | footprints:C2685546_BUZ-SMD_4P-L7_5-W7_5-BR | BUZZER1 |
| 1 | VREG | TestPoint:TestPoint_Pad_D2.0mm | TP3 |
| 1 | VSW | TestPoint:TestPoint_Pad_D2.0mm | TP5 |
| 1 | W25Q64JVSSIQ_C179171 | footprints:C179171_SOIC-8_L5_3-W5_3-P1_27-LS8_0-BL | U4 |
| 1 | XIAO-Add-On SAMD21 | YUWEI_Lib:XIAO-SAMD21-SMD | U1 |
| 1 | ~ | YUWEI_Lib:FCS0V474ZFTBR24 | U5 |
| 1 | ~ | YUWEI_Lib:DS3231 Breakout | U2 |
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Questions
How big is the TIME CAP PCB?
It measures 96.1 × 57.1 mm and has 2 copper layers, 1.6 mm thick.
What parts does the TIME CAP use?
27 parts, built around the MCP1700T-3002E/TT(MS), BSS138, DMG2305UX and SMD-7525-3627-16Ω. 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 TIME CAP KiCad files?
From the NotARealDevOrDesigner/time_cap_pcb repository on GitHub, at the commit this page was made from: the board is TIME_CAP.kicad_pcb and its schematic TIME_CAP.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the TIME CAP design in my own project?
Its repository states no licence, so its author keeps all rights: ask NotARealDevOrDesigner before reusing the design.