2 layers50.8 × 81.3 mm
Burrboard
drogue-iot/burrboard
This repository contains prototyping boards for RH summit, aka burrboards, firmware running on the burrboard feathers, and the software around it
34 parts3Apache-2.0
4 layers59 × 71 mm
PEC Sensor
WAFFLE-Systems/PEC_Sensor1Electrical schematics and PCB gerber files for the Pulsed Eddy Current Sensor
- Size
- 59 × 71 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 98
- Nets
- 51
- Pads
- 191
- Tracks, vias
- 119, 72
- Pours
- 21
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 9 Jan 2026
- Updated
- 24 Mar 2026
Overview
PEC Sensor is an open-source printed circuit board by WAFFLE-Systems, from the WAFFLE-Systems/PEC_Sensor repository on GitHub. It is a 4-layer board of 59 × 71 mm with 98 parts on 51 nets, routed with 119 tracks and 72 vias.
It is built around the AD8221AR, AP62301WU and OPA820ID, with the TC4420CPA, APT2012LVBC/D and APT2012LZGCK among its other parts. Its parts include 14 capacitors, 13 resistors, 6 connectors, 4 ICs and 3 diodes. It belongs with the sensors and measurement boards of this library.
Main components
8
AD8221AR
SOIC8Precision Instrumentation AmplifierAnalog DevicesUncategorised
AP62301WU
TSOT-26-40℃~+125℃ 1 155uA 3A 4.2V~18V 750kHz 800mV~7V Adjustable Buck Buck Built-in Yes TSOT-26 DC-DC Converters ROHSDiodes IncorporatedDC-DC ConvertersOPA820ID
SOIC-8-45℃~+85℃ -6V~-2.5V、2.5V~6V 1 110mA 17uA 2.5nV/√Hz@100kHz 240V/us 280MHz 400nA 4uV/℃ 5.6mA 5V~12V 750uV 85dB Enable/shutdown function SOIC-8 Operational Amplifier ROHSTexas InstrumentsOperational Amplifier
TC4420CPA
PDIP-80℃~+150℃ 1 25ns 25ns 4.5V~18V 450uA 6A 6A MOSFET PDIP-8 Gate Drivers ROHSMicrochip TechnologyGate Drivers
APT2012LVBC/D
SMD,2x1.3mm-40℃~+85℃ 120mW 140° 2.65V 24mcd 2mA 465nm 470nm Blue Discrete Diode Water Clear SMD,2x1.3mm LED Indication - Discrete ROHSKingbrightLED Indication - Discrete
APT2012LZGCK
0805-40℃~+85℃ 102.5mW 140° 2.65V 2mA 50mcd 515nm 525nm Discrete Diode Emerald Green Water Clear 0805 LED Indication - Discrete ROHSKingbrightLED Indication - Discrete
CDBA340L-HF
SMA(DO-214AC)1mA@40V 3A 400mV@3A 40V SMA(DO-214AC) Schottky Diodes ROHSComchipSchottky Diodes
SSM3K336R,LF
SOT-23F1 N-channel 1.7nC@4.5V 126pF@15V 1W 2.5V@100uA 30V 3A 95mΩ@2A,10V SOT-23F MOSFETs ROHSToshibaMOSFETs
Parts
98| Qty | Value | Footprint | References |
|---|---|---|---|
| 53 | , , , , , , , , , , , , , , , +37 | ||
| 5 | 0.1uF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C1, C9, C10, C12, C13 |
| 5 | 1kΩ | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R5, R7, R8, R9, RG1 |
| 2 | 10.6kΩ | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R3, R4 |
| 2 | 100kΩ | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R10, R11 |
| 2 | 10kΩ | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R2, R6 |
| 2 | 10uF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C2, C11 |
| 2 | 22uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C5, C6 |
| 2 | Conn_01x15_Pin | Connector_PinHeader_2.54mm:PinHeader_1x15_P2.54mm_Vertical | J2, J3 |
| 1 | 1.0uF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C8 |
| 1 | 100pF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C4 |
| 1 | 10kΩ | Potentiometer_SMD:Potentiometer_Bourns_TC33X_Vertical | RV1 |
| 1 | 10uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C3 |
| 1 | 3.3uH | Inductor_SMD:L_Taiyo-Yuden_NR-40xx | L1 |
| 1 | 330nF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C7 |
| 1 | 50Ω | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R12 |
| 1 | 52.3kΩ | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1 |
| 1 | 5V | TestPoint:TestPoint_THTPad_D2.0mm_Drill1.0mm | TP1 |
| 1 | 6.8uF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C14 |
| 1 | AD8221 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U2 |
| 1 | AP62301WU | Package_TO_SOT_SMD:TSOT-23-6 | U1 |
| 1 | APT2012LVBC/D | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D3 |
| 1 | APT2012LZGCK | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D2 |
| 1 | CDBA340L-HF | Diode_SMD:D_SMA_Handsoldering | D1 |
| 1 | Conn_01x02_Pin | Connector_BarrelJack:BarrelJack_Horizontal | J1 |
| 1 | Driver Coil | Connector_JST:JST_EH_S2B-EH_1x02_P2.50mm_Horizontal | J5 |
| 1 | Encoder | Connector_JST:JST_EH_S4B-EH_1x04_P2.50mm_Horizontal | J6 |
| 1 | GND | TestPoint:TestPoint_THTPad_D2.0mm_Drill1.0mm | TP2 |
| 1 | OPA820 | Package_TO_SOT_SMD:SOT-23-5 | U3 |
| 1 | SSM3K336R | Package_TO_SOT_SMD:TSOT-23 | Q1 |
| 1 | Sensor Coil | Connector_JST:JST_EH_S2B-EH_1x02_P2.50mm_Horizontal | J4 |
| 1 | TC4420 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U4 |
Questions
How big is the PEC Sensor PCB?
It measures 59 × 71 mm and has 4 copper layers, 1.6 mm thick.
What parts does the PEC Sensor use?
98 parts, built around the AD8221AR, AP62301WU, OPA820ID and TC4420CPA. 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 PEC Sensor KiCad files?
From the WAFFLE-Systems/PEC_Sensor repository on GitHub, at the commit this page was made from: the board is PEC_Sensor.kicad_pcb and its schematic PEC_Sensor.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the PEC Sensor design in my own project?
Its repository states no licence, so its author keeps all rights: ask WAFFLE-Systems before reusing the design.
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