SOFT SWITCH

8TP08

2B-SOFT SWITCH

 

THE SPECIALITIES  OF PROJECT

 

This is a simple project. With the help of soft switch (micro switch) any electric load just as bulb etc can be put ON/OFF. The consumption of electricity is very less. It can be used as a light switch for any stair light. Any type of electric load can be put ON/OFF with this little switch.

TECHNICAL DESCRIPTION AND WORKING OF THE PROJECT

 

This project has been developed and tested by our readers and sent to the “T.V.Engineers Technical lab” for publication in the book. The spare parts and PCB of the projects published in the series of our book publication or available in the market. The information of project code is given in the first and last page of the books.

By pressing micro switch in the circuit we can put ON/OFF the AC lamp. Very little current flows through the switch. With the little pressure the switch operates and output of the IC. With every stroke the output of IC CD4027 goes high and low. The IC used is CMOS J-K monster slave flip-flop IC. The output of is given to the transistor T2 BC547. After amplification with transistor output goes to the triac. The load (lamp) is connected to the triac. The triac used BT136 is a simple triac used in the circuit.

To use the micro switch for staircase light to micro switch in parallel or required. Once switch is connected at the top and second at the bottom. By pressing any micro switch the lamp is put ON and then put OFF. The operation is repeated.

PRECAUTIONS WHILE MAKING THE PROJECT

 

  1. Keep clean the PCB and see that there is no shorting in the PCB.
  2. Use IC base for the IC.
  3. The ON/OFF switch and preset should be of good quality.

Check the components to be used in the circuit and use proper value of the components.