A DIY ECG made from single op-amp (LM741) and 5 resistors by Scott Harden:
I made surprisingly good ECG from a single op-amp and 5 resistors! An ECG (electrocardiograph, sometimes called EKG) is a graph of the electrical potential your heart produces as it beats. Seven years ago I posted DIY ECG Machine on the Cheap which showed a discernible ECG I obtained using an op-amp, two resistors, and a capacitor outputting to a PC sound card’s microphone input.
DIY ECG with 1 op-amp – [Link]
RELATED POSTS
- 14 December, 2015 PINE A64, First $15 64-Bit Single Board Super Computer
- 23 January, 2018 3D Printed Objects that can connect to Wi-Fi without any Electronics
- 6 December, 2017 Arduino Breathalyzer Using MQ3 Gas sensor and OLED Display
- 21 April, 2016 Teardown: 12V AC adapters
- 2 August, 2016 Colour grabbing Scribble Pen
- 21 May, 2021 STMicroelectronics A6986I automotive 38 V, 5W Iso-Buck converter
Mike is the founder and editor of Electronics-Lab.com, an electronics engineering community/news and project sharing platform. He studied Electronics and Physics and enjoys everything that has moving electrons and fun. His interests lying on solar cells, microcontrollers and switchmode power supplies. Feel free to reach him for feedback, random tips or just to say hello :-)
view all posts by admin- 3D Printing (4)
- AI (266)
- Arduino (852)
- Audio (82)
- Basic Electronics (92)
- Books (18)
- Control (81)
- DIY (62)
- Ebay (1)
- Electronics-Lab (16)
- FPGA (122)
- GPS (72)
- Hardware (60)
- High Voltage (33)
- IC (734)
- Interface (80)
- IoT (658)
- Laser (44)
- LCD/OLED/ePaper (219)
- Led (196)
- Light (20)
- Mcu (619)
- Miscellaneous (79)
- Motor (147)
- Parts (245)
- PCB (115)
- Photovoltaic (75)
- Power (168)
- Power supply (175)
- Products (412)
- Raspberry Pi (405)
- RF (127)
- Robots (63)
- SBC (1019)
- Science (132)
- Sensor (612)
- SoC-SiP (14)
- Software (177)
- Soldering (31)
- SoM-CoM (45)
- Technology (229)
- Test Equipment (208)
- Test/Measurements (237)
- Timer (42)
- Tools (84)
- Top Stories (553)
- Uncategorized (69)
- USB (163)
- Websites (67)
- Youtube (99)
- /r/askelectronics
- /r/electronics
- 1-click BOM
- 3D ContentCentral
- Adafruit
- Adafruit Eagle Library
- Aisler
- All About Circuits
- Altium Circuit Maker
- Altium Designer
- Autodesk EAGLE
- AutoDesk Library.io
- AVRDUDE
- AVRDUDESS – A GUI for AVRDUDE
- CADENCE ALLEGRO
- CADSTAR
- Caneda
- Circuit JS
- Circuit Sandbox
- CircuitLab
- CircuitMaker
- CircuitPeople
- CometCAD
- Contextual Electronics' Getting to Blinky Tutorial
- Contextual Electronics' Shine on You Crazy KiCad
- Crowd Supply
- Design Spark PCB
- DipTrace
- DIPTRACE
- Dirty PCBs
- Eagle
- Eagle – List of ULPs everyone should know
- EasyEDA
- EasyEDA Gerber Viewer
- EASYPC
- EEVblog
- EEVBlog forum
- Electrical Engineering – Khan Academy
- Electronic Circuits and Projects
- Electronics Stack Exchange
- Electronics-Talk.com
- ElectronicsTutorials
- ElektorLabs
- Elliott Sound Products
- Embedded Lab
- Every Circuit
- EXPRESSPCB
- Eyrie.io
- Findchips
- FreeVideoLectures/Electronics
- Fritzing
- GC-Prevue
- gEDA
- Gerblook
- Gerbv
- GrabCAD
- GreatScott!
- Hackaday.io
- Hackster
- iCircuit
- Indiegogo
- Instructables
- JLCPCB
- Kerry D. Wong
- KiCAD
- KiCad Cheatsheet
- KiCad Footprint Collection
- KiCAD Gerbview
- KiCad Third-Party Tools
- KiCAD.info Forums
- Kickstarter
- KiKit – Automation for KiCAD
- Kitspace.org
- LCSC
- LibrePCB
- LTSpice
- Maker.io
- Maker.pro
- Mayhew Labs 3dpcb
- MENTOR
- Multisim
- Ngspice
- Octopart
- OemSecrets
- OrCAD
- OSH Park
- Pad2Pad
- PADS
- Part-DB
- Partkeepr
- Parts.io
- Partsbox.io
- PartSim
- PCB Shopper
- PCB123
- PCBWeb
- Pentalogix ViewMate
- Pololu
- PULSONIX
- PwnKitteh/InsanelyCheapElectronics
- Qucs
- SamacSys
- SnapEDA.com
- Sparkfun
- SparkFun Electronics Eagle Libraries
- Technoblogy
- The Signal Path
- Tindie
- traceParts
- Tracespace Viewer
- Ultra Librarian
- Upverter
- Viewplot
- Voltlog
- WIN SOURCE
- WinAVR
- Xesscorp's list of KiCAD 3rd party tools
- ZenitPCB
- ZofZPCB
Join 97,426 other subscribers