2 layers100 × 80 mm
Smart Home Controller
Ajith-Anand-R/Smart-Home-Controller
Full-stack IoT home automation system with ESP32 firmware, Google Apps Script backend, web dashboard, and Flutter mobile app.
11 parts1MIT
2 layers95 × 60 mm
PulseFlow - PCB
HuibSmeets/PulseFlow1Control a fan speed by heart rate
- Size
- 95 × 60 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 28
- Nets
- 55
- Pads
- 112
- Tracks, vias
- 175, 2
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 20 Nov 2024
- Updated
- 15 Dec 2024
Overview
PulseFlow - PCB is an open-source printed circuit board by HuibSmeets, from the HuibSmeets/PulseFlow repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 95 × 60 mm with 28 parts on 55 nets, routed with 175 tracks and 2 vias.
It is built around the BT136-600E, IRM-03-9 and MOC3021, with the SFH620A-3 and ULN2003A among its other parts. Its parts include 12 resistors, 3 ICs, 3 connectors, 2 capacitors and 1 transistor. It belongs with the radio and wireless and sensors and measurement boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
5
BT136-600E
TO-220-40℃~+125℃@(Tj) 1 TRIAC 1.5V 1.5W 1.7V 10mA 15mA 30A 4A 600V TO-220 Thyristors (SCR)/Modules ROHSJSMSEMIThyristors (SCR)/Modules
IRM-03-9
-- Power Module/Power Supply ROHSMWPower Module/Power Supply
MOC3021
DIP-6-55℃~+110℃ 1 1.15V 1000V/us 1A 330mW 400V 50mA 5kV 6 No TRIAC DIP-6 Triac, SCR Output Optoisolators ROHSLite-OnTriac, SCR Output Optoisolators
SFH620A-3
DIP-4-55℃~+100℃ 1 1.25V 100% 250mV@10mA,2.5mA 250mW 2us 2us 320% 5.3kV 50mA 60mA 70V AC,DC Phototransistor DIP-4 Transistor, Photovoltaic Output Optoisolators ROHSVishay IntertechnologyTransistor, Photovoltaic Output Optoisolators
ULN2003A
SOP-16-40℃~+85℃ 0.93mA 100uA 15pF 20uA 30V 50V Seven channels SOP-16 Darlington Transistor Arrays ROHSUMWDarlington Transistor Arrays
README
README.mdPulseFlow
Control the speed of a cooling fan with your heart rate while riding/using your indoor trainer.
Image: Prototype, work in progress
Description
PulseFlow is a small Arduino sketch that connects via BLE to a HR fitness sensor like those from Garmin, Wahoo and others. The fan is connected to a PWM controllable AC dimmer or a dimmer that exposes 2 pins: Output Zerocross detection, input triac trigger. These AC dimmers can be sourced from marketplaces like AliExpress.
Warning
BE AWARE THAT YOU'LL BE WORKING WITH DEADLY LIVE VOLTAGES. TAKE APPROPRIATE SAFETY MEASURES WHEN CONNECTING PARTS AND WHILE USING THE DEVICE YOU CREATED.
Limitations
- Your HR sensor must allow for multiple BLE connections as your trainer software/device will possiby have to connect to the sensor too using BLE (Garmin HR-Dual sensor supports multiple BLE connections)
- Sensor pairing is hardcoded, see the sourcecode
- Use a fan that has no electronic speed control of it's own.
- The HR to fan speed mapping is hardcoded, see the sourcecode
- In case of a PWM controlled dimmer:
- The PWM signal is available on pin D6 (Arduino numbering)
- Code to generate the PWM is Nano 33 BLE specific
- In case of zero-cross/triac trigger dimmer:
- Pin 2 (Arduino numbering) is used to detect the zero-crossing (interupt)
- The triac trigger pulse is available on pin D6 (Arduino numbering)
- The delay implementation between the zero-crossing and the triactrigger is Nano 33 BLE specific
- As the NANO is a 3.3V device the AC dimmer you use must be 3.3v tolerable/compatible (or add levelshifting)
- Installing the various parts in a metal of shielded housing can influense the BLE RF signal
Possible enhancements
- Do away with hardcoded pairing
- Create an UI (e.g. a 2-Line display and rotary encoder) for pairing, map settings.
- Alternate fan speed mapping methods (speed, power,...).
Change Log
in development (main)
- code cleanup
- added battery level check
- delayed switch off
v1.1.0
- added code for 2nd type of dimmer
v1.0.0
- Initial release
Parts
28| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3_ISO14580 | H1, H2, H3, H4 |
| 3 | 4K7 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R5, R11, R12 |
| 2 | 15K/1W | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R7, R8 |
| 2 | 290R | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R2, R3 |
| 2 | Screw_Terminal_01x04 | TerminalBlock_Phoenix:TerminalBlock_Phoenix_MPT-0,5-4-2.54_1x04_P2.54mm_Horizontal | J1, J2 |
| 1 | 0.01 uF/400V | Capacitor_THT:C_Rect_L10.0mm_W4.0mm_P7.50mm_FKS3_FKP3 | C4 |
| 1 | 0.05uF/400V | Capacitor_THT:C_Rect_L13.0mm_W6.0mm_P10.00mm_FKS3_FKP3_MKS4 | C3 |
| 1 | 330R | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1 |
| 1 | 360R | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R4 |
| 1 | 360R/1W | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R6 |
| 1 | 39R/1W | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R10 |
| 1 | 470R/1W | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R9 |
| 1 | Arduino_Nano_33_BLE_Rev2 | MyFootPrints:Arduino_Nano_WithMountingHoles | ARD1 |
| 1 | BT136-600 | Package_TO_SOT_THT:TO-220-3_Vertical | Q1 |
| 1 | Heatsink_Pad | MyFootPrints:Heatsink_Fischer_SK-431-1x25mm | HS1 |
| 1 | IRM-03-9 | Converter_ACDC:Converter_ACDC_MeanWell_IRM-03-xx_THT | PS1 |
| 1 | MOC3021 | Package_DIP:DIP-6_W7.62mm | U2 |
| 1 | SFH620A-3 | Package_DIP:DIP-4_W7.62mm | U3 |
| 1 | Screw_Terminal_01x04 | TerminalBlock_Phoenix:TerminalBlock_Phoenix_MKDS-1,5-4-5.08_1x04_P5.08mm_Horizontal | J3 |
| 1 | ULN2003A | Package_DIP:DIP-16_W7.62mm | U1 |
Questions
How big is the PulseFlow - PCB PCB?
It measures 95 × 60 mm and has 2 copper layers, 1.6 mm thick.
What parts does the PulseFlow - PCB use?
28 parts, built around the BT136-600E, IRM-03-9, MOC3021 and SFH620A-3. 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 PulseFlow - PCB KiCad files?
From the HuibSmeets/PulseFlow repository on GitHub, at the commit this page was made from: the board is pcb/PulseFlow - PCB.kicad_pcb and its schematic pcb/PulseFlow - PCB.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the PulseFlow - PCB design in my own project?
Its repository publishes it under the GPL-3.0 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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