line follower whit atmega8 - Page 2 - Electronic Circuits Projects Diagrams Free

philba · 30th October 2006, 04:11 PM

sigh. those are completely different processors? I suggest you spend a little time in the datasheet (summary is ok) and try to figure out the different between those two chips. you might just be suprised.

on the ELM line follower. I've seen that design before and was struck by his sensors. he pulls his npn phototransistors low, not high and uses them in an emitter follower form. he also has a single dropping resistor for all 6 line sensor LEDs. this will result in varying radiance. He doesn't use any shielding but relies on some sort of calibration.

still it actually works.

Igor Moreira · 30th October 2006, 06:35 PM

So, I Think I'm on the wrong way?

philba · 30th October 2006, 07:05 PM

Quote:

Originally Posted by Igor Moreira

So, I Think I'm on the wrong way?

I have no idea what that means, Go look at the datasheets for the atmega8 16AC and 16PI try to understand the differences.

Igor Moreira · 30th October 2006, 07:31 PM

The data sheet is the same, the diferce between 16AC and 16 PIC is the 16ac is commercial SMD and 16PI is industrial, My problem is the terminals. in 16ac I have the terminals ADC6 and ADC6, In 16PI I don't have those terminals. So, I need to know where is this in 16PI. My english is not so good, Sorry. /but thanks for your helps.

Igor Moreira · 30th October 2006, 07:38 PM

Quote:

Originally Posted by giaosucan

I've just finished building a line follower robot ,I use six sensors which are arranged horizontally. You should use PIC or 89 rather than atmega8 ,it works more perfectly.
howere ,you must care about noise of sensor. It is very important for building a line follower robot .To eliminate the noise of sensor ,you can use software or hardware to solve this trouble
good luck

I have only the atmel programator, I don't have the PIC programator.

philba · 30th October 2006, 08:19 PM

Yes, and it doesn't have ADC7 either. If you want it completely done for you, I suggest you go buy a kit. otherwise, roll up your sleeves and get your hands dirty.

One more hint - ADC stands for Analog to Digital converter. Note that ADC4 and 5 are unused. You also get the source code. look at the section scan_sens. take a look at how it walks though the sensors - you might find a pleasant surprise.

Igor Moreira · 31st October 2006, 11:07 AM

My knowledge in assembly still are limited, if you can give me a tip how I modify the souce code to put ADC4 and ADC5 in the ADC6 and ADC7 place.

philba · 31st October 2006, 01:30 PM

kicking and screaming.

dude, just look at the code.

Quote:

you might find a pleasant surprise

Igor Moreira · 1st November 2006, 12:34 PM

I'lltake a look.
Thank you!

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30th October 2006, 04:11 PM	(permalink)
philba	sigh. those are completely different processors? I suggest you spend a little time in the datasheet (summary is ok) and try to figure out the different between those two chips. you might just be suprised. on the ELM line follower. I've seen that design before and was struck by his sensors. he pulls his npn phototransistors low, not high and uses them in an emitter follower form. he also has a single dropping resistor for all 6 line sensor LEDs. this will result in varying radiance. He doesn't use any shielding but relies on some sort of calibration. still it actually works.

30th October 2006, 06:35 PM	(permalink)
Igor Moreira	So, I Think I'm on the wrong way?

30th October 2006, 07:31 PM	(permalink)
Igor Moreira	The data sheet is the same, the diferce between 16AC and 16 PIC is the 16ac is commercial SMD and 16PI is industrial, My problem is the terminals. in 16ac I have the terminals ADC6 and ADC6, In 16PI I don't have those terminals. So, I need to know where is this in 16PI. My english is not so good, Sorry. /but thanks for your helps.

30th October 2006, 08:19 PM	(permalink)
philba	Yes, and it doesn't have ADC7 either. If you want it completely done for you, I suggest you go buy a kit. otherwise, roll up your sleeves and get your hands dirty. One more hint - ADC stands for Analog to Digital converter. Note that ADC4 and 5 are unused. You also get the source code. look at the section scan_sens. take a look at how it walks though the sensors - you might find a pleasant surprise.

31st October 2006, 11:07 AM	(permalink)
Igor Moreira	My knowledge in assembly still are limited, if you can give me a tip how I modify the souce code to put ADC4 and ADC5 in the ADC6 and ADC7 place.

1st November 2006, 12:34 PM	(permalink)
Igor Moreira	I'lltake a look. Thank you!