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Electronics Schematics - S

Capacitance / Touch Switch Circuits -
Sensors and Detectors

3 Way Touch Lamp:  A three-way switch to control a lamp (off-dim-bright, etc.) uses an NE555 Timer to generate a1-second pulse, triggered by ambient ac fields that are picked up by the human body. Read also the circuit description.

Alarm Touched Triggered: 

Capacitance Proximity Alarm:

Capacitive Sensor: Special design for shop-windows animation Useful for many types of touch controls

Fastest Finger First Indicator:

Proximity Alarm

Three Way Touch Lamp:  A three-way switch to control a lamp (off-dim-bright, etc.) uses an NE555 Timer to generate a1-second pulse, triggered by ambient ac fields that are picked up by the human body. Read also the circuit description.

Touch Activated Alarm: 

Touch Dimmer:

Touch Switch #2

Touch Switch #3:

Touch Switch #4:  This is achieved using a jugfet, it is a very simple circuit and very effective to with a minimum component count working via a 1.5v cell.

Touch Switch using Transistors: 

Touch Switches:

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