2 layers137.2 × 83.8 mm
GeneralPurposeAlarmDevicePCB
PubInv/general-purpose-alarm-device
A general purpose alarm device (with software) as a module for medical devices (and others)
140 parts7AGPL-3.0
2 layers21 × 9 mm
FanPWMtoRotorLock
mlh5599/FanPWMtoRotorLockConverts the output from a 12v PWM fan to a rotor lock detector signal
- Size
- 21 × 9 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 13
- Nets
- 10
- Pads
- 36
- Tracks, vias
- 115, 6
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 23 Oct 2024
- Updated
- 31 Oct 2024
Overview
FanPWMtoRotorLock is an open-source printed circuit board by mlh5599, from the mlh5599/FanPWMtoRotorLock repository on GitHub, published under the MIT licence. It is a 2-layer board of 21 × 9 mm with 13 parts on 10 nets, routed with 115 tracks and 6 vias.
It is built around the NE555P and MMBT2907ALT1G. Its parts include 6 resistors, 2 capacitors, 2 transistors, 2 connectors and 1 IC.
Main components
2README
README.mdFanPWMtoRotorLock
Utilizes a missing pulse detector based on the circuitry here to convert the output from a 12v PWM fan to a rotor lock detector signal.
BOM
- 1 10uf Capacitor SMT 08051
- Molex 022232031 Connector
- 1 JST-PH2.0MM Connector
- 1 MMBT2222A-7-F SOT-23 NPN Transistor
- 1 MMBT2907ALT1G SOT-23 PNP Transistor
- 5 10K Ohm Restor SMT 0805
- 1 100 Ohm Resistor SMT 0805
- 1 NE555P SOIC-8 Timer
Images
Parts
13| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | 10K | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2, R3, R5, R6 |
| 1 | .1uf | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C2 |
| 1 | 0022232031 | Connector_JST:JST_PH_B3B-PH-K_1x03_P2.00mm_Vertical | J2 |
| 1 | 0022232031 | digikey-footprints:PinHeader_1x3_P2.54mm_Drill1.02mm | J1 |
| 1 | 100 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R4 |
| 1 | 10uf | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1 |
| 1 | MMBT2222A-7-F | digikey-footprints:SOT-23-3 | Q2 |
| 1 | MMBT2907ALT1G | digikey-footprints:SOT-23-3 | Q3 |
| 1 | NE555P | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U1 |
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Questions
How big is the FanPWMtoRotorLock PCB?
It measures 21 × 9 mm and has 2 copper layers, 1.6 mm thick.
What parts does the FanPWMtoRotorLock use?
13 parts, built around the NE555P and MMBT2907ALT1G. 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 FanPWMtoRotorLock KiCad files?
From the mlh5599/FanPWMtoRotorLock repository on GitHub, at the commit this page was made from: the board is FanPWMtoRotorLock.kicad_pcb and its schematic FanPWMtoRotorLock.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the FanPWMtoRotorLock design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).