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hello friends, im new to the world of micro controllers and pragramming them. i had heard that picaxe systems were fairly beginner friendly. i purchased my first programable robot using the LMR instructions and somewhere i think i did something wrong missed something.i tried my best to follow the simple intructions but i guess im a true amature lol i loaded the software to my computer successfuly, and got as far as plugging it and loading it first commands or program... BUT!, when i pug it in with ...

Originally Posted by erco

You want the max possible signal voltage swing at the ptx/resistor junction as the encoder wheen spins, but it will never be zero nor will it be Vcc. If you're getting Vcc, check your connectiobs & ptx polarity. Then adjust your resistors. For a reflective sensor, you need lots of LED current, so a low LED resistor, and a high ptx resistor. 1-4 volts is pretty good signal swing, and the PicAxe's schmidt triggers do a good job of filtering: http://www.youtube.com/watch?v=PfMnl...3&feature=plcp

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Originally Posted by cdngunner

You wont get an answer until you mention which pic your using?

Thanks. Pls see revised post

Originally Posted by g6ejd

Disconnect the PICAXE and activate the phototransistor and measure the voltage at the emitter, as seen by the PIC, does it go to zero when off and +5.1V when on?

Have you set the PICAXE to be an Input on that pin?

I thought the command
if pinc.6 = 1
would cause the pin to be set as an input. Not so?

Yes, the voltage at the emitter is zero when off and 5.1 when on.

Originally Posted by g6ejd

Disconnect the PICAXE and activate the phototransistor and measure the voltage at the emitter, as seen by the PIC, does it go to zero when off and +5.1V when on?

Have you set the PICAXE to be an Input on that pin?

I thought the command
if pinc.6 = 1
would cause the pin to be set as an input. Not so?