4 layers22.4 × 32.2 mm
2 layers25.6 × 26.6 mm
Flu detect
wlatif-cmyk/100daysofprojects8100 days of 100 projects ;)
- Size
- 25.6 × 26.6 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 10
- Nets
- 6
- Pads
- 36
- Tracks, vias
- 77, 19
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 15 Nov 2025
- Updated
- 11 Feb 2026
Overview
Flu detect is an open-source printed circuit board by wlatif-cmyk, from the wlatif-cmyk/100daysofprojects repository on GitHub. It is a 2-layer board of 25.6 × 26.6 mm with 10 parts on 6 nets, routed with 77 tracks and 19 vias.
It is built around the OPA355NA/3K and SFH 213 FA. Its parts include 4 resistors, 2 capacitors, 1 IC and 1 diode.
Main components
2
OPA355NA/3K
SOT-23-6-2.75V~-1.25V、1.25V~2.75V -40℃~+125℃ 1 2.7V~5.5V 200MHz 2mV 360V/us 3pA 5.8nV/√Hz@1MHz 50pA 60mA 7uV/℃ 8.3mA 80dB Enable/shutdown function Rail-to-rail output SOT-23-6 Operational Amplifier ROHSTexas InstrumentsOperational Amplifier
SFH 213 FA
插件,D=4.8mm-40℃~+100℃ 10° 150mW 1nA 50V 750nm~1100nm 900nm 插件,D=4.8mm Photodiodes ROHSOSRAM Opto SemiconPhotodiodes
README
README.md100 Days of Projects — TikTok Series
https://www.tiktok.com/@yappingaddiction
https://www.instagram.com/yappingaddiction/
Welcome to my 100-day challenge!
Every day, I build something small, fun, or weird — and post it on TikTok.
This repo collects the code, notes, and mini-projects from each day.
Follow along as this slowly turns into a chaotic but glorious archive of experiments.
📆 Daily Projects
Day 1 — Traffic light system
Day 2 — Light meter that runs off of ultrasonic sensor
Day 3 — Ball game with LCD Module
Day 4 — Fan Motion Detection
Day 5 — LED colour changer
Day 6 — Anti-procrastination tool
Day 7 — Anti-procrastination tool major improvements - added timer, timer reset button, and improved screen contrasting
Day 8 — LED Night light
Day 9 — Button piano
Day 10 — Improvements to LED night light - added alarm system
Day 11 — Clothing temperature/humidity sensor
Day 12 — Arduino project generator
Day 13 — Servo motor joystick control
Day 14 — Servo motor joystick control + Remote control using IR sensors
Day 15 — Budgeting dashboard site
Day 16 — Servo motor hand recognition control
Day 17 — Servo motor hand recognition control2 - same concept but motor moves when hand open/closes
Day 18 — Interview prep tool to prioritize/learn proper eye contact
Day 19 — Funny face tool using OpenCV
Day 20 — Advanced touchless volume controller
Day 21 — Motion gesture controlled brightness
Day 22 — Motion gesture cursor
Day 23 — Spotify playlist analyzer
Day 24 — Currency converter
Day 25 — Weather app
Day 26 — To do list app
Day 27 — "Panda" - designer player upon detection of panda plushie
Day 28 — Basic chatbot
Day 29 — Number guesser
Day 30 — Motion gesture controlled LED
Day 31 — RFID card reader
Day 32 — Password manager
Day 33 — Expense Tracker
Day 34 — Soldered project (no code)
Day 35 — Cheat code controlled door lock
Day 36 — Added pin unlock on phone for door lock
Day 37 — Built final prototype for door lock
Day 38 — Portable system wiring (No code)
Day 39 — Joystick controlled cursor
Day 40 — Hypnotic art drawing game on python
Day 41 — Esp32 portable communication led project
Day 42 — Mood bot
Day 43 — Mini Spotify display
Day 44 — Added buttons to Spotify display
Day 45 — Math alarm clock
Day 46 — Improved math alarm clock
Day 47 — STM32 power modes
Day 48 — Pong on joysticks
Day 49 — ESP32 WIFI network ranking
Day 50 — Balloon popper
Day 51 — Productivity measure using CV
Day 52 — ESP32 WIFI channel interference detector
Day 53 — Improved day 18 project (interview eye contact detector) to give score afterward
Parts
10| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 100K | Resistor_SMD:R_0201_0603Metric | R1, R2 |
| 1 | 0.1pF | Capacitor_SMD:CP_Elec_3x5.3 | C2 |
| 1 | 100nF | Capacitor_SMD:CP_Elec_3x5.3 | C1 |
| 1 | 33K | Resistor_SMD:R_0201_0603Metric | R3 |
| 1 | 500K | Resistor_SMD:R_0201_0603Metric | R4 |
| 1 | DETECT_OUT | TerminalBlock_Phoenix:TerminalBlock_Phoenix_PTSM-0,5-2-2,5-V-SMD_1x02-1MP_P2.50mm_Vertical | DETECT_EN1 |
| 1 | GND | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | 3.3V1 |
| 1 | OPA355NA | Package_TO_SOT_SMD:SOT-23-6 | U2 |
| 1 | SFH213FA | LED_THT:LED_D5.0mm_IRGrey | D1 |
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Questions
How big is the Flu detect PCB?
It measures 25.6 × 26.6 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Flu detect use?
10 parts, built around the OPA355NA/3K and SFH 213 FA. 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 Flu detect KiCad files?
From the wlatif-cmyk/100daysofprojects repository on GitHub, at the commit this page was made from: the board is kicad/algaephotobioreactor/florodetection/flu_detect.kicad_pcb and its schematic kicad/algaephotobioreactor/algae_photobioreactor/flu_excite.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Flu detect design in my own project?
Its repository states no licence, so its author keeps all rights: ask wlatif-cmyk before reusing the design.