using PIC16F877A Automatic Fan Speed using Temperature (LM3)

Discussion about projects that used PIC Microcontroller, Hardware Interface, Programming Algorithm and etc......

Re: using PIC16F877A Automatic Fan Speed using Temperature (

Postby HollyJuster » Thu Jul 07, 2016 12:47 am

Hi everyone..!! Actually i still use same power supply, but i don't understand for PIC16F876A only use 1 port VDD and 2 port VSS and PIC16F877A using 2 port VDD and VSS ..do I need to just connect both VDD and VSS to the source and ground? .actually, I just want to change the LCD portC connection to portD, in details, i want to change RC0-RC7 with RD0-RD7 for LCD connection.Also i would like to say that just connect VDD to 5V and VSS to GND. You can change PORT for LCD connection from C to D, since the SK40C is using the PORTD,
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Re: using PIC16F877A Automatic Fan Speed using Temperature (

Postby anhtran19932111 » Thu Aug 25, 2016 5:52 pm

I want to change RC0-RC7 with RD0-RD7 for LCD connection.
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Re: using PIC16F877A Automatic Fan Speed using Temperature (

Postby anhtran19932111 » Tue Sep 06, 2016 3:34 pm

I just connect VDD to 5V and VSS to GND.
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Re: using PIC16F877A Automatic Fan Speed using Temperature (

Postby ZaM » Tue Sep 06, 2016 5:55 pm

anhtran19932111 WROTE:I want to change RC0-RC7 with RD0-RD7 for LCD connection.


Hi, yes you can change LCD from port C to port D but minimal code changes is needed for example Port declaration TRISC to TRISD. Make sure to refer Datasheet for more info or you can compare code sample code from SK40C because SK40c use port D for LCD.
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