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====== Digispark Pin Usage Guide ======

This table details the function of each pin on the Digispark and any notes the are relevant.

^  Pin \\ Number  ^  Output \\ Voltage  ^  Analogue Port Number \\ ''analogRead()''  ^  PWM  ^  USB  ^  Test \\ LED  ^  I2C  ^
|0          |5 V            |                     |Y - 504 Hz |                   |Rev 1    |SDA  |
|1          |5 V            |                     |Y - 504 Hz |                   |Rev 2 / 4|     |
|2          |5 V            |1                    |           |                   |         |SCL  |
|3          |3.6 V          |3                    |           |Y - 1.5k Ohm to 5 V \\ Zener diode (3.6 V maximum in- & output) | |
|4          |3.6 V          |2                    |Y - 1007 Hz|Y \\ Zener diode (3.6 V maximum in- & output)   | | |
|5          |3 V            |0                    |           |                   |         |     |

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