how much voltage does the bs2 put out?

Jayguy5000

when the command

High1

is executed, how much voltage does the stamp put out? I need to use the stamp to put out 5v. If that doesn't do it what will?

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Actually I think Im going to add the whiskers to my tank and let it roam, just need to figure out where.

PJAllen

Got a voltmeter?

Jayguy5000

yea but its a wacky one that comes up with all different kinds of numbers. If it worked good enough I would rely on it, but I cant.

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Actually I think Im going to add the whiskers to my tank and let it roam, just need to figure out where.

PJAllen

Open the dreaded PBASIC Help and refer to HIGH.

T&E Engineer

Yes.
HIGH pin will send out 5 volts dc.
LOW pin will give 0 volts dc.
Using a HIGH 1 command will provide 5 volts DC output on·pin P1·(which is actually pin·6 on the BS2). You should probably set a value to "1" (as it is misleading what pin you are sugesting).
Pins P0 - P15 on the BS2 (actual pins 5-20) are either configured as Input pins or output pins.
As the BS2 Help example states:

' HIGH_LOW.BS2' This simple program sets I/O pin 0 high for 1/2 second and low for' 1/2 second in an endless loop.  Connect an LED to P0 for a simple' blinker.' {$STAMP BS2}Main:  HIGH 0  PAUSE 500  LOW 0  PAUSE 500  GOTO Main  END

Make sure you realize how "long" you want the 5 volts dc output voltage to be sent out of the pin.
·

Jayguy5000

but its so much less painfull to have some one else do the work for me!

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Actually I think Im going to add the whiskers to my tank and let it roam, just need to figure out where.

T&E Engineer

It sounds like your meter has weak batteries and need to be replaced.

Once you do this you should be able to switch the volt ohm meter·to VDC and touch the 2 leads (black and red) together and it should get close to 0 or 0.00 something.

At this point you should be able to measure 5volts dc between actual·pins 6 (for I/O pin P1 - use red lead) and Vss ground (actual pin 4 - use black lead).

Mike Green

The voltage range of any CMOS output (like those in the Stamp) is actually more like 4.7V down to 0.3V. The datasheet for the device will give a tested value (usually called Voh and Vol ... Voltage - output high and Voltage - output low). The 0.3V is the typical saturation voltage of an MOSFET like those in the output driver of the I/O pin.

Tom Walker

Also remember that while the pin might be reading almost 5 volts, it can only provide a relatively small amount of current. If this confuses you, then some more education might be needed before you destroy a pin.

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Truly Understand the Fundamentals and the Path will be so much easier...

David H.

jayguy5000; It's probably your digital meter takes a little bit to arrive at the correct reading, and if your pin is going high for a short period and then going low, it may not be giving your meter time to lock in on the correct reading.

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David


There are 10 types of people in this world,...
Those that understand binary numbers, and those that don't!!!