page of the official plan, there is an unknown value on Flipmu tied to a resistor with an asterisk that refers to the MAX documentation on the official Arduino.
- How will this be worth?
To answer to this question you need to know the following values:
- DC forward current
- Forward voltage
which are respectively the current and voltage beyond which there is damage to the led and must be notified to 'purchase. In my case I 3.1 V and 20mA .
emphasize the importance of this n za step because the damage to the LEDs may not be visible in the 'immediate, but over time, dramatically reducing the longevity of the LED.
To determine this value correctly, we use the table provided in the link mentioned above:
| Forward voltage | |||||
| ISEGA | 1.5V 2.0V | 2.5V | 3.0V | 3.5V | |
| 40mA | 12.2kΩ | 11.8kΩ | 11.0kΩ | 10.6kΩ | 9.69kΩ |
| 30mA | 17.8kΩ | 17.1kΩ | 15.8kΩ | 15.0kΩ | 14.0kΩ |
| 20mA | 29.8kΩ | 28.0kΩ 25.9kΩ 24.5kΩ | 22.6kΩ | ||
| 10mA | 66.7kΩ 63.7kΩ 59.3kΩ | 55.4kΩ 51.2kΩ | |||
breeding values \u200b\u200bfirst, you get the value of ohmic resistor. In my case this value is 24.5kΩ . If you can not find the correct value, you should buy a higher value resistor to protect the LEDs (in my case finding 24.5kΩ, would opt for a 25kΩ).
As for the resistor network, I'm pretty sure that the values \u200b\u200bare not different from those cited in the official plan (10 Ohms 10-pin) to pin however I noticed that the shield of the space devoted to unsped network of resistors has nine holes ... boh?! if anyone know any more comments!
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