vocational training equipment,The touch delay switch circuit

Specifications

vocational training equipment, The touch delay switch circuit

1.Project Overview

      The touch delay switch is a new type of energy-saving electronic switch. It widely applied in multi-storey residence and office buildings outside corridor,hallway, stairwells, elevator, corridor and other public places. The working principle:When the pedestrian approach the lamp, Touch the switch can make the lights light up automatically.Delay a period of time the light go out automatically.

The project designed a touch control switch for corridor lights. Touch the switch to turn on light, and turn off after 20 seconds.

2.schematic diagram

3.Introduction to principle

The touch delay switch circuit is the shown in the above. Ac 220 v voltage first goes by load the lamp, goes by commutation diode commutation diode get to SCRMCR100-6. The delay trigger circuit that made up of transistors, resistors and capacitors delay trigger thyristor conduction and control the conduction time. You can get different delay time by using plug wire choose J4-J8 that correspond different resistors and capacitors.

4.Training project

1)     Painting circuit schematic diagram and PCB diagram with Protel software

2)     Electronic simulation

3)     Electronic components selection and testing

4)     Circuit board welding and debugging

5)     Lab report

5. List of Components