A very simple computer
Tuesday, September 6, 2011
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| A very simple computer schematic diagram |
This deceptively crude circuit performs the function ofmathematically averaging three voltage signals together, and so fulfills a specialized computational role. In other words, it is a computer that can only do one mathematical operation: averaging three quantities together.
Build this circuit as shown and measure all battery voltages with a voltmeter. Write these voltage figures on paper and average them together (E1 + E2 + E3, divided by three). When you measure each battery voltage, keep the black test probe connected to the ”ground” point (the side of the battery directly joined to the other batteries by jumper wires), and touch the red probe to the other battery terminal. Polarity is important here! You will notice one battery in the schematic diagram connected ”backward” to the other two, negative side ”up.” This
battery’s voltage should read as a negative quantity when measured by a properly connected digital meter, the other batteries measuring positive.
Build this circuit as shown and measure all battery voltages with a voltmeter. Write these voltage figures on paper and average them together (E1 + E2 + E3, divided by three). When you measure each battery voltage, keep the black test probe connected to the ”ground” point (the side of the battery directly joined to the other batteries by jumper wires), and touch the red probe to the other battery terminal. Polarity is important here! You will notice one battery in the schematic diagram connected ”backward” to the other two, negative side ”up.” This
battery’s voltage should read as a negative quantity when measured by a properly connected digital meter, the other batteries measuring positive.
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| A very simple computer illustration |
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| A very simple computer illustration |
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