Dot matrix printers print characters by punching ink onto paper through a print head using patterns of dots to form letters. Each character is made up of a specific map of dots, such as the letter H having 7 dots in the first column, two dots in the fourth position for the next two columns, and then 7 dots to finish. While dot matrix printers are the cheapest option for printing and are simple to build and maintain, the resolution is very low and they do not print color well.

1. Dot Matrix Printers
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2. How it works:
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Punches ink onto the
paper, like a typewriter.
Uses patterns of dots to
make letters.
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3. How it works:
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Letters are made up of
patterns.
Usually 7 dots vertically, but
variations have been
observed.
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4. How it works:
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Each character has a map of
dots that are printed.
For example:
–
H has 7 dots in the first
column, two dots in position 4
for the next two, then 7 dots
for the final part.
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5. Found in:
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Anywhere where price is key.
Anywhere where quality
doesn't matter.
Payslips, reciepts, paperwork
.
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6. Pros and Cons
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The cheapest per page
method for printing.
Simple to build and maintain.
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Very low resolution.
Doesn't cope that well with
colour.
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