This stress level Detector Circuit can be used as a Bio feedback control circuit for knowing the emotional status of a human brain and whether the person is suffering from […]
Touch Operated Flip Flop Relay Switch
The post explains a simple yet very useful touch operated flip flop circuit. It operates by touching a sensor pad which results in an alternate high/low logic outputs in response […]
Zero Crossing Detector Circuit
Many complex circuits and integrated circuits contain zero crossing detectors, but we will deal only with the detector here. The detector produces a pulse each time the mains voltage goes […]
Wire Current Detector Circuit
This simple circuit can be used for detecting 50 Hz current inside a conductor without physically connecting with the conductor. You just have to bring the L1 coil near the […]
Ferrous, Non-Ferrous Metal Detector Circuit
The function of this adsorption type metal detector is to indicate the presence of ferrous and non-ferrous type metals. Its functionality depends on the absorption of magnetic energy. An inductor […]
Radioactivity Detector Circuit
The term “Geiger Counter“ refers to a device which actually counts the number of radio active particles passing through a specified area and while this circuit does not actually count, […]