DIY ECG with 1 op-amp
https://www.electronics-lab.com/diy-ecg-with-1-op-amp/
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 […]
Light and Dark Sensitive Switch
https://www.electronics-lab.com/light-and-dark-sensitive-switch/
Light / Dark Sensitive Switch project is a simple project which operates a relay when the light falling on the LDR goes below or goes above a set point. Input – 12 V @ 50 mA Relay output – SPDT relay 2-in-1 kit, either as light sensitive kit or dark sensitive switch Onboard preset to […]