PC Based speed control of dc motor

A

Thread Starter

ashim

I am doing my final year project on PC based speed control of dc
motor... in my previous year presentation I've done the same project
for 5 volt dc motor.

main idea was that: by c programming i've select ports of parallel
port..out put goes to decoder..after decoding, decoder's out put goes
to resistance series and then to hex inverter.

inverted out put goes to 555 timer(for pwm).

pw modulated output goes to the base of a NPN transistor which is
connected in series with the DC motor...

but we've done only presentation no hardware implementation.

in this year we want to develop the same for 230 v dc motor..using
MOSFET in place of NPN transistor.. so i need your help with proper
circuit diagram and programming part(in C) also....

waiting for a reply..
 
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