4 layers103.5 × 48.3 mm
ButtonBd2
frc971/electrical
This repo contains the electrical files for the 971 FRC team. The files include PCBs and the electrical system diagrams. The PCBs are created using KiCad.
165 parts3Apache-2.0
4 layers21.8 × 27.8 mm
Mag encoder
frc971/electrical3This repo contains the electrical files for the 971 FRC team. The files include PCBs and the electrical system diagrams. The PCBs are created using KiCad.
- Size
- 21.8 × 27.8 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 22
- Nets
- 25
- Pads
- 72
- Tracks, vias
- 174, 26
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 22 Dec 2023
- Updated
- 6 Nov 2026
Overview
Mag encoder is an open-source printed circuit board by frc971, from the frc971/electrical repository on GitHub, published under the Apache-2.0 licence. It is a 4-layer board of 21.8 × 27.8 mm with 22 parts on 25 nets, routed with 174 tracks and 26 vias.
It is built around the MA732GQ, AP2120N-3.3TRG1 and BSS84, with the MMSD4148T1G-MS among its other parts. Its parts include 7 resistors, 5 diodes, 3 capacitors, 2 ICs and 2 connectors.
Main components
4
MA732GQ
VQFN-16_L3.0-W3.0-P0.50-BL-EP1.6TQFN-16-EP(3x3) Position Sensors ROHSMonolithic Power SystemsPosition Sensors
AP2120N-3.3TRG1
SOT-23-40℃~+85℃@(Tj) 1 150mA 200mV@(100mA) 25uA 3.3V 30uVrms 65dB@(1kHz) 6V Fixed Over Current Protection Positive SOT-23 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSDiodes IncorporatedVoltage Regulators - Linear, Low Drop Out (LDO) RegulatorsBSS84
SOT-23-55℃~+150℃ 1 P-Channel 130mA 2.8pF 24.6pF 2V 3.2Ω@5V 300mW 4.7pF 50V 590pC@10V SOT-23 MOSFETs ROHSDiodes IncorporatedMOSFETs
MMSD4148T1G-MS
SOD-1231.25V@150mA 150mA 1uA 400mW 4A 4ns 75V SOD-123 Switching Diodes ROHSMSKSEMISwitching Diodes
README
README.mdThis repo contains the electrical files for the 971 FRC team. The files include PCBs and the electrical system diagrams. The PCBs are created using KiCad.
Parts
22| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 1.00k-1%-0603 | Resistor_SMD:R_0603_1608Metric | R1, R5, R6, R7 |
| 3 | 100R-1%-0603 | Resistor_SMD:R_0603_1608Metric | R2, R3, R4 |
| 3 | 1uF-10%-25V-0603 | Capacitor_SMD:C_0603_1608Metric | C1, C2, C3 |
| 2 | MountingHole | mag-encoder:pin-0.100 | H1, H2 |
| 1 | 0015912055 | mag-encoder:Molex-70634-0039 | J2 |
| 1 | AP2120N-3.3TRG1 | Package_TO_SOT_SMD:SOT-23 | U1 |
| 1 | BSS84 | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | CONFIG | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical | J1 |
| 1 | HI | LED_SMD:LED_0603_1608Metric | D5 |
| 1 | LO | LED_SMD:LED_0603_1608Metric | D3 |
| 1 | MA732GQ | mag-encoder:QFN-16-1EP_3x3mm_P0.5mm_EP1.7x1.7mm | U2 |
| 1 | MMSD4148T1G | Diode_SMD:D_SOD-123 | D2 |
| 1 | OK | LED_SMD:LED_0603_1608Metric | D4 |
| 1 | ON | LED_SMD:LED_0603_1608Metric | D1 |
Questions
How big is the Mag encoder PCB?
It measures 21.8 × 27.8 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Mag encoder use?
22 parts, built around the MA732GQ, AP2120N-3.3TRG1, BSS84 and MMSD4148T1G-MS. 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 Mag encoder KiCad files?
From the frc971/electrical repository on GitHub, at the commit this page was made from: the board is circuit-boards/shaft-encoders/mag-encoder2/mag-encoder.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Mag encoder design in my own project?
Its repository publishes it under the Apache-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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