GENERAL DESCRIPTION
PIC has been
used to control the LED or buzzer directly for some other projects. But in this
project, PIC cannot directly activate the DC brushless fan because it has not
enough current.NPN power transistor (BD135) is required, so that dc brushless
fan can be controlled by PIC.PIC16F873A will read the analog voltage (using
ADC) from LM35 temperature sensor and display it on LCD display. A buzzer, LEDs
or fans will be activated when temperature reach a certain temperature value.
For this project, temperature sensors (LM35) and cooling fans
are connected to the circuit board through some wires and connectors. The
length of the wires is various depend on the distance of certain where would be
measured. Each polarity should be correctly connected. Differentiate the of the
connector and please use 2510 connector for LM35 and 2532 connector for cooling
fan.
No comments:
Post a Comment