GLOW  A  LAMP  VIA  TRANSISTOR



HELLO FRIENDS,

In this session lets discuss about "How a LAMP can be controlled by transistor".This is simillar to "SWITCH CONTROL OF A LED" the only difference here is we are connecting a LAMP via trans.. instead of connecting LED directly to 8051. just for a change;) here we are using LAMP instead of LED. before implimentation we must be aware of functionality and basics of transistor.

SIMPLE  INTRO  OF  TRANS..:-)

Transistor is a semiconductor device which is a combination of two diodes and  used for switching and amplification purpose.In this implimentation we are using this as a switch. so lets discuss it only as a switch. 


Trans as a switch:

Will explain you guys in simple way with example.
Its function is just like a TAP,Consider a TAP  as shown below .  At first , TAP is tightly closed hence no water flows but when we apply force to open the TAP then water can flow easily. similar way "current flows from emitter to collector only when base current is supplied".Here base current act as Force for transmission. hope you guys understood the concept ;)

Now lets move towards Interfacing and Programming part using AT89C52 microcontroller from ATMEL family of 8051.

INTERFACING:-)

When switch is OFF

 when switch is ON

PROGRAMMING:-)

For detailed tutorial watch vedio.....