4 layers93.9 × 45.6 mm
4 layers35.5 × 33.7 mm
Monitor
rcls/monitor- Size
- 35.5 × 33.7 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 89
- Nets
- 72
- Pads
- 306
- Tracks, vias
- 680, 132
- Pours
- 25
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 23 May 2025
- Updated
- 29 Jun 2026
Overview
Monitor is an open-source printed circuit board by rcls, from the rcls/monitor repository on GitHub. It is a 4-layer board of 35.5 × 33.7 mm with 89 parts on 72 nets, routed with 680 tracks and 132 vias.
It is built around the OPA2388ID, TPSM365R6V3RDNR and FXLS8971CFR1, with the LM27761DSG and BAV70 among its other parts. Its parts include 33 capacitors, 29 resistors, 7 ICs, 4 connectors and 3 diodes. It belongs with the STM32 boards of this library.
Main components
5
OPA2388ID
SOIC-8-2.75V~-1.25V、1.25V~2.75V -40℃~+125℃ 1.9mA 10MHz 140dB 2 2.5V~5.5V 250nV 30pA 5V/us 5nV/℃ 60mA 700pA 7nV/√Hz@1kHz EMI filtering/RF suppression、Zero drift / auto-zero、Reverse-phase input protection Rail-to-Rail Input, Rail-to-Rail Output SOIC-8 Precision Op Amps ROHSTexas InstrumentsPrecision Op Amps
TPSM365R6V3RDNR
QFN-11(4.5x3.5)-40℃~+125℃ 1MHz 2mm 3.3V 3.5mm 3.6V~65V 4.5mm 4uA 600mA 80.2% Buck Overheat protection、Over Current Protection ±1.5% QFN-11(4.5x3.5) DC-DC Power Modules ROHSTexas InstrumentsDC-DC Power ModulesFXLS8971CFR1
DLQFN-12(3x3)DLQFN-12(3x3) Accelerometers ROHSNXP SemiconductorsAccelerometers
LM27761DSG
WFDFN-8-EP(2x2)-40℃~+85℃ -5V~-1.5V 2.7V~5.5V 250mA 2MHz 2Ω 370uA 80% Inverted Support WFDFN-8-EP(2x2) Charge Pumps ROHSTexas InstrumentsCharge Pumps
BAV70
SOT-23-55℃~+150℃ 1 Pair Common Cathode 1.25V@150mA 2.5uA@70V 200mA 225mW 2A 6ns 70V SOT-23 Switching Diodes ROHSJiangsu Changjing Electronics Technology (CJ)Switching Diodes
Parts
89| Qty | Value | Footprint | References |
|---|---|---|---|
| 12 | 0u1 | Capacitor_SMD:C_0402_1005Metric | C4, C5, C11, C12, C13, C32, C34, C57, C91, C92, C93, C94 |
| 10 | 1u | Capacitor_SMD:C_0402_1005Metric | C1, C2, C3, C33, C42, C51, C53, C54, C56, C58 |
| 5 | 100 | Resistor_SMD:R_0402_1005Metric | R61, R62, R63, R64, R65 |
| 5 | TestPoint | Parts:TestPoint | TP1, TP2, TP3, TP31, TP301 |
| 4 | 4u7 | Capacitor_SMD:C_0402_1005Metric | C41, C43, C44, C52 |
| 4 | MountingHole_Pad | Parts:MountingHole_3mm_Pad | H1, H2, H3, H4 |
| 3 | 100k | Resistor_SMD:R_0603_1608Metric | R3, R8, R52 |
| 3 | 4k7 | Resistor_SMD:R_0603_1608Metric | R56, R57, R58 |
| 2 | 1 | Resistor_SMD:R_0402_1005Metric | R11, R55 |
| 2 | 10 | Resistor_SMD:R_0402_1005Metric | R9, R43 |
| 2 | 10u | Capacitor_SMD:C_0402_1005Metric | C14, C55 |
| 2 | 200k | Resistor_SMD:R_0603_1608Metric | R4, R7 |
| 2 | 22p | Capacitor_SMD:C_0402_1005Metric | C16, C17 |
| 2 | 39k | Resistor_SMD:R_0603_1608Metric | R5, R6 |
| 2 | NetTie_2 | Parts:NetTie-2_0.2mm | NT1, NT2 |
| 1 | 0R1 | Resistor_SMD:R_0603_1608Metric | R31 |
| 1 | 100p | Capacitor_SMD:C_0402_1005Metric | C61 |
| 1 | 100u | Capacitor_SMD:C_1206_3216Metric | C35 |
| 1 | 10k | Resistor_SMD:R_0402_1005Metric | R12 |
| 1 | 1N5819 | Diode_SMD:D_SOD-323 | D3 |
| 1 | 1k | Resistor_SMD:R_0603_1608Metric | R2 |
| 1 | 1k | Resistor_SMD:R_0402_1005Metric | R66 |
| 1 | 1m | Resistor_SMD:R_1206_3216Metric | R1 |
| 1 | 200k | Resistor_SMD:R_0402_1005Metric | R41 |
| 1 | 220k | Resistor_SMD:R_0603_1608Metric | R51 |
| 1 | 22k | Resistor_SMD:R_0603_1608Metric | R54 |
| 1 | 32768Hz | Crystal:Crystal_SMD_3215-2Pin_3.2x1.5mm | Y1 |
| 1 | 330k | Resistor_SMD:R_0603_1608Metric | R53 |
| 1 | 4u7 | Capacitor_SMD:C_1206_3216Metric | C31 |
| 1 | 510k | Resistor_SMD:R_0402_1005Metric | R42 |
| 1 | BAV70 | Package_TO_SOT_SMD:SOT-23 | D2 |
| 1 | Display | Parts:JST_XH_B4B-XH-A_1x04_P2.50mm_Vertical | J3 |
| 1 | FXLS8971CF | Parts:FXLS8971CF | U7 |
| 1 | LM27761 | Package_SON:WSON-8-1EP_2x2mm_P0.5mm_EP0.9x1.6mm | U4 |
| 1 | NetTie_2 | NetTie:NetTie-2_SMD_Pad0.5mm | NT3 |
| 1 | OPA2388 | Package_SO:MSOP-8_3x3mm_P0.65mm | U2 |
| 1 | Program | Parts:PinHeader_1x08_P2.54mm_Vertical | J4 |
| 1 | REF5025ADGK | Package_SO:MSOP-8_3x3mm_P0.65mm | U5 |
| 1 | STM32U031K8Ux | Package_DFN_QFN:QFN-32-1EP_5x5mm_P0.5mm_EP3.45x3.45mm | U1 |
| 1 | TMP117xxDRV | Parts:WSON-6-1EP_2x2mm_P0.65mm_NoEP | U6 |
| 1 | TPSM365R6V3RDNR | Parts:RDN0011A-MFG | U3 |
| 1 | USB_C_Plug | Parts:USB-C-male-24-Ass | J1 |
| 1 | USB_C_Receptacle_USB2.0_14P | Parts:USB_C_Receptacle_16P | J2 |
| 1 | White | LED_SMD:LED_0603_1608Metric | D1 |
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Questions
How big is the Monitor PCB?
It measures 35.5 × 33.7 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Monitor use?
89 parts, built around the OPA2388ID, TPSM365R6V3RDNR, FXLS8971CFR1 and LM27761DSG. 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 Monitor KiCad files?
From the rcls/monitor repository on GitHub, at the commit this page was made from: the board is monitor.kicad_pcb and its schematic clocky.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Monitor design in my own project?
Its repository states no licence, so its author keeps all rights: ask rcls before reusing the design.