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@@ -4,7 +4,7 @@ The 3x4 and 4x4 matrix keyboards are commonly used for user input. Usually,
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the row and column wires are connected to GPIO pins on a microcontroller. A
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simple approach requires 7 wires for a 3x4 keypad.
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-This article introduces a new technique wish reduces the number of GPIO pins
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+[This article](keypad_to_microcontroller.md) introduces a new technique wish reduces the number of GPIO pins
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down to 6, 5 and even 4, using software scanning techniques and diodes.
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Even though this reduces GPIO pin requirements in a manner similar to
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