What am i doing wrong? First project - Electronic Circuits Projects Diagrams Free

Zordon · 30th March 2008, 08:41 PM

I'am trying to built a simple circuit that will adjust the brightness of an LED depending on the input voltage.
Im using a 4mhz crystal and i have pins 8 and 19 grounded, pin 20 +5Volts
The chip is a pic16f876
Ive attached the settings on my stuff.

Salgat · 31st March 2008, 12:23 AM

I think this is the first time I've heard of a microcontroller being programmed in ladder logic, does the AVR support this? Sorry that I'm unable to answer your question :\

Zordon · 31st March 2008, 02:03 AM

yeah you can download it here and its for AVR
http://cq.cx/ladder.pl

eblc1388 · 31st March 2008, 07:44 AM

The author has a very nice tutorial about turning On/Off a LED with a push button. It also use a 16F876 as yours.

Have you tried it out yet? It is so important that one should follow the tutorial to prove that every step of the process is happening smoothly and have chance sort out any hardware/software problem one might encounter.

Many don't appreciate the importance of flashing a LED on a PIC or AVR and think it is a childish act. They will never understand its the whole process that counts.

bananasiong · 31st March 2008, 08:04 AM

Do you have /MCLR pulled up?

Hero999 · 31st March 2008, 05:50 PM

Quote:

Originally Posted by Salgat

I think this is the first time I've heard of a microcontroller being programmed in ladder logic, does the AVR support this? Sorry that I'm unable to answer your question :\

Me too, I thought ladder logic was just a PLC thing.

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30th March 2008, 08:41 PM	(permalink)
Zordon	What am i doing wrong? First project I'am trying to built a simple circuit that will adjust the brightness of an LED depending on the input voltage. Im using a 4mhz crystal and i have pins 8 and 19 grounded, pin 20 +5Volts The chip is a pic16f876 Ive attached the settings on my stuff.

31st March 2008, 12:23 AM	(permalink)
Salgat	I think this is the first time I've heard of a microcontroller being programmed in ladder logic, does the AVR support this? Sorry that I'm unable to answer your question :\

31st March 2008, 02:03 AM	(permalink)
Zordon	yeah you can download it here and its for AVR http://cq.cx/ladder.pl

31st March 2008, 07:44 AM	(permalink)
eblc1388	The author has a very nice tutorial about turning On/Off a LED with a push button. It also use a 16F876 as yours. Have you tried it out yet? It is so important that one should follow the tutorial to prove that every step of the process is happening smoothly and have chance sort out any hardware/software problem one might encounter. Many don't appreciate the importance of flashing a LED on a PIC or AVR and think it is a childish act. They will never understand its the whole process that counts. __________________ L.Chung

31st March 2008, 08:04 AM	(permalink)
bananasiong	Do you have /MCLR pulled up? __________________ Superman returns..