logging in or signing up triac based dimmer nani4713 Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: Embed: Flash iPad Dynamic Copy Does not support media & animations Automatically changes to Flash or non-Flash embed WordPress Embed Customize Embed URL: Copy Thumbnail: Copy The presentation is successfully added In Your Favorites. Views: 969 Category: Science & Tech.. License: All Rights Reserved Like it (1) Dislike it (0) Added: March 14, 2011 This Presentation is Public Favorites: 0 Presentation Description No description available. Comments Posting comment... By: 169gajju (25 month(s) ago) I HAVE TO DOWNLOAD THIS PRESENTATIO .PLEASE ALLOW ME TO DOWNLOAD TRIAC BASED DIMMER PRESENTATION. Saving..... Post Reply Close Saving..... Edit Comment Close Premium member Presentation Transcript Triac based Four Step Touch Dimmer: Triac based Four Step Touch Dimmer S.VIJAY PRESENTED BY B.SANTHOSHINI E.C.E BRANCHOverview: Overview Introduction How it works Block diagram of Triac based Four Step Touch Dimmer Mechanism of Triac &Diac based Four Step Touch Dimmer Working procedure Features of Triac power control based Four Step Touch Dimmer Advantages Applications ConclusionHow it works? . : How it works? . 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. Another touch puts off the lightBlock diagram: Block diagram Capacitor Array Transformer less DC Power Supply 6.8V Regulated zener circuit TT6061A Triac 230V Lamp Touch PlateWorking Procedure: Working Procedure Touch plate is coupled to the touch detector through 820pF, 2kV capacitors C1, C2, and C3 connected in series. Internally IC TT6061A’s touch signal is connected to the counter/decoder via a resistor and clock input CK is connected to the counter/decoder via a frequency generator. Line frequency signal is taken through R4 at pin 2 of IC TT6061A. At zero crossing, the tri ac (BT136) triggers to drive a200W bulb The 6.8V power supply is taken directly from mains through resistors R1 and R3, diode D3, capacitor C4, and zener diode and fed to power-input pin 3 of the IC.Slide 7: Pin Assignments of IC TT6061A Pin no. Pin name Function description 1 CK System clock input 2 FI 50Hzlinefrequency 3 VDD Power input pin for VDD 4 TI Touch input 5 CI Sensor control input 6 NC Not connected 7 VSS Power input for VSS 8 AT Angle Trigger OutputTriac Lamp Dimmer Circuit. : Triac Lamp Dimmer Circuit.Touch: Touch Touching this touch dimmer you can increase the light intensity of incandescent lamps in three steps. The touch dimmer is built around 8-pin CMOS ICTT8486A/TT6061A specifically manufactured for touch dimmer applications.Triac Applications: Triac ApplicationsTriac power controll: Triac power controll A triac control circuit is shown in figure. Here it is controlling ac power to load by switching on and off during the positive and negative half cycles of the input sinusoidal signal. During the positive half cycle of the input voltage, diode D1 is forward biased, D2 is reverse-biased, and the gate terminal is positive with respect to A1 During the negative half cycle, the diode D2 is forward biased and diode D1 is reverse-biased, so that the gate becomes positive with respect to terminal A2- The point of commencement of conduction is controlled by adjusting the resistance R2 .Applications: Applications Industrial machinery Agriculture Motors Water pumpsHousehold applications: Household applications Ovens Refrigerator ACAdvantages: Advantages Highly Accurate Low cost and reliable circuit Adjustable Time can be set using potentiometer Four different fixed time schedules Can handle heavy loads up to 7AConclusion: Conclusion By simply touching this touch dimmer you can increase the light intensity of incandescent lampsReference: Reference http://www.circuitstoday.com/triac-applications http://www.circuitstoday.com/diac-applications http://www.google.comTHANK YOU: THANK YOU You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.