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TOUCH SENSITIVE POLICE SIREN CIRCUIT Here we are going to discuss about Touch sensitive siren Circuit. I hope you enjoyed my previous post about RF REMOTE CONTROL AND SWITCHING CIRCUIT. As the Name of this circuit indicates, it is sensitive to our touch. The circuit will generate a siren, similar to police siren, when someone touch across the end terminals A and B. The circuit keeps ALARM as long as the touch. Read More.....

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 set the level Power-On LED indicator Relay On LED indicator Power Battery Terminal (PBT) for easy relay output connection Four mounting holes of 3.2 mm each PCB dimensions 50 mm x 54 mm. [ Llink ]

This electronic touch dimmer circuit can increase the light intensity of incandescent lamps in three steps. Using a CMOS IC TT8486A TT6061A you can build a very simple dimmer circuit which can be used to control intensity of an incandescent lamb by simply touch a contact. Initially, when mains switch is ‘on,’ the bulb is ‘off’. Now, if you touch the touch plate, the bulb glows dimly. On second touch, the bulb gives medium light. At the third touch, the bulb is driven fully and another touch puts off the light. Sensitive Touch Light Dimmer Circuit Diagram: This sensitive touch light dimmer circuit uses minimum external components and can be used for 110V or 220V AC by simply changing some external components . For touch plate, you can use a simple copper plate of 1cm×1cm (a small piece of PCB) or even the end of the lead wire. Touch plate is coupled to the touch detector through 1000pF, 2kV capacitors C4, C5 connected in series. Internally IC TT6061A’s touch signal is connected to the c...