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
- 12 March, 2017 Teardown, Repair & Calibration of a Keithley 2400 Source Measure Unit
- 31 May, 2018 High-resolution motor-driver board targets open-source 3D-printer
- 5 December, 2018 WisTrio LORA Tracker by RAK Wireless is based on the RK5205
- 28 September, 2015 Get rid of unpleasant odors easily and effectively
- 7 May, 2021 Linux and Windows Hardware boot selection switch
- 23 July, 2016 Bridging ISM radio and wifi for lunch money
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 (260)
- Arduino (851)
- Audio (82)
- Basic Electronics (91)
- Books (18)
- Control (81)
- DIY (62)
- Ebay (1)
- Electronics-Lab (16)
- FPGA (120)
- GPS (71)
- Hardware (60)
- High Voltage (33)
- IC (731)
- Interface (79)
- IoT (648)
- Laser (44)
- LCD/OLED/ePaper (219)
- Led (196)
- Light (20)
- Mcu (613)
- Miscellaneous (79)
- Motor (147)
- Parts (245)
- PCB (115)
- Photovoltaic (75)
- Power (168)
- Power supply (175)
- Products (410)
- Raspberry Pi (396)
- RF (125)
- Robots (63)
- SBC (1004)
- Science (132)
- Sensor (611)
- SoC-SiP (14)
- Software (177)
- Soldering (31)
- SoM-CoM (41)
- Technology (229)
- Test Equipment (205)
- Test/Measurements (236)
- Timer (42)
- Tools (84)
- Top Stories (536)
- Uncategorized (69)
- USB (162)
- 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
- Perceptive Component
- 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