To test a Stamp (or a Homework Board), you try some of the examples in the "What's a Microcontroller?" tutorial. If the Stamp Editor can identify the Board and you can download a program to it, you know that the microprocessor on the Homework Board is working and that the serial connection to the PC is working. To test the I/O pins, you use the examples in the tutorial that show how to make an LED light up and repeat them for each of the 16 I/O pins. One example has the LED connected between the I/O pin and ground. The other example has the LED connected between the I/O pin and +5V (Vdd). You need to try both. Lastly, you need to make sure the input mode for the I/O pin is working. The tutorial has examples of the use of a switch (pushbutton) and you need to try that with each I/O pin.
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Jax
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If a robot has a screw then it must be romoved and hacked into..