4 layers34.5 × 34.5 mm
Readout splitter
BUNPC/NN22-Technical-Documents
Repository for the storage and dissemination of NN22 technical documents
86 parts10
2 layers122 × 122.3 mm
Trigger board
BUNPC/NN22-Technical-Documents10Repository for the storage and dissemination of NN22 technical documents
- Size
- 122 × 122.3 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 70
- Nets
- 47
- Pads
- 204
- Tracks, vias
- 391, 103
- Pours
- 6
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 12 Feb 2024
- Updated
- 18 Feb 2025
Overview
Trigger board is an open-source printed circuit board by BUNPC, from the BUNPC/NN22-Technical-Documents repository on GitHub. It is a 2-layer board of 122 × 122.3 mm with 70 parts on 47 nets, routed with 391 tracks and 103 vias.
It is built around the SN74HCS00D, MMBT3904 and BAV99. Its parts include 28 resistors, 9 capacitors, 9 diodes, 8 transistors and 6 connectors.
Main components
3
SN74HCS00D
SOIC-14-40℃~+125℃ 1.5V~4.2V 12ns@6V,50pF 2 2V~6V 2mV~100mV、180mV~300mV、220mV~330mV 2uA 300mV~1V、900mV~2.2V、1.2V~3V 4 7.8mA 7.8mA 74HCS Series NAND Gate SOIC-14 Logic Gates ROHSTexas InstrumentsLogic Gates
MMBT3904
SOT-23-55℃~+150℃ 1 NPN 100 100nA 200mA 200mW 300MHz 300mV 40V 6V NPN SOT-23 Bipolar (BJT) ROHSJiangsu Changjing Electronics Technology (CJ)Bipolar (BJT)BAV99
SOT-231 Pair Series Connection 1.25V@150mA 100V 215mA 250mW 4A 4ns 500nA@80V SOT-23 Switching Diodes ROHSNexperiaSwitching Diodes
README
Hardware Main/Electronics/Detector Electronics/DET_Splitter/README.mdreadout-splitter
This is a splitter board designed to be plug-compatible with the TIGRIS one. See top-level README for some more details.
Connector from readout system is a Samtec SHF-117-01-L-D-SM shrouded 34-pin header with 0.05" pitch.
Detector connector is Samtec SFMC-118-02-S-D 36-pin socket strip with 0.05" pitch. Note that the TIGRIS schematic and layout use mirrored pinout for the detector connector (odd-even swap).
Designed LDOs:
- Negative: ADP7182ACPZN-R7
- Positive: ADP7142ACPZN5.0-R7
The negative adjustable regulator should output -15.0V with the resistors shown. There is an additional filter in the design (R+C on front side) which can (according to the datasheet) reduce the noise a bit in the negative regulator. There is no such provision for the positive regulator.
This is a 4-layer board and a bit dense. There were a few compromises made in routing with shared vias, etc but hopefully it will be OK.
Parts
70| Qty | Value | Footprint | References |
|---|---|---|---|
| 9 | 10.0k 1% | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R7, R8, R10, R16, R17, R22, R23, R28 |
| 8 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R4, R5, R6, R11, R14, R15, R20, R21 |
| 8 | MMBT3904 | Package_TO_SOT_SMD:SOT-23 | Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8 |
| 5 | 100 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2, R3, R13, R19, R26 |
| 5 | LED | my_LED:LED_0603_marked | D1, D2, D3, D4, D5 |
| 4 | 3.3k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R9, R12, R18, R24 |
| 4 | 47nF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C2, C3, C4 |
| 4 | BAV99 | Package_TO_SOT_SMD:SOT-23 | D6, D7, D8, D9 |
| 4 | Conn_Coaxial | BNC:BNC_Amphenol_B6252HB-NPP3G-50_Horizontal | J1, J2, J3, J4 |
| 4 | SW_Push | E-Switch-800:800SP9B6M6RE | SW1, SW2, SW3, SW4 |
| 2 | 0.1uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C7, C9 |
| 2 | 1uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C5, C6 |
| 1 | 10uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C8 |
| 1 | 1k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R25 |
| 1 | 24.0k 1% | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R27 |
| 1 | Antenna | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | AE1 |
| 1 | Conn_01x07 | Connector_PinSocket_2.54mm:PinSocket_1x07_P2.54mm_Horizontal | J6 |
| 1 | FerriteBead_Small | Inductor_SMD:L_1210_3225Metric_Pad1.42x2.65mm_HandSolder | FB1 |
| 1 | Hammond 1598BBK | Hammond_Box:Hammond_1598B | N1 |
| 1 | Jumper_3_Open | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | JP1 |
| 1 | MIC5318 | Package_TO_SOT_SMD:SOT-23-5_HandSoldering | U2 |
| 1 | SN74HCS00 | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U1 |
| 1 | USB_B_Micro | Molex-USB:USB_Micro-AB_Molex_47590-0001 | J5 |
Questions
How big is the Trigger board PCB?
It measures 122 × 122.3 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Trigger board use?
70 parts, built around the SN74HCS00D, MMBT3904 and BAV99. 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 Trigger board KiCad files?
From the BUNPC/NN22-Technical-Documents repository on GitHub, at the commit this page was made from: the board is Hardware Peripherial/ninjaNIRS Triggerbox/hardware/Rev2_KiCAD/trigger-board/trigger-board.kicad_pcb and its schematic Hardware Main/Electronics/Detector Electronics/DET_Optode/flex-VEMD/flex-VEMD.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Trigger board design in my own project?
Its repository states no licence, so its author keeps all rights: ask BUNPC before reusing the design.
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