LED Cube/Column Resistors in Detail: Unterschied zwischen den Versionen
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Marvin (Diskussion | Beiträge) (Die Seite wurde neu angelegt: „Choosing the right column resistors for your LED cube requires you to consider several factors: * Suitability of the cube base for different colors * Expected USB…“) |
Marvin (Diskussion | Beiträge) Keine Bearbeitungszusammenfassung |
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* Voltage drop on the transistor array | * Voltage drop on the transistor array | ||
* Voltage drop on the LED | * Voltage drop on the LED | ||
For now, we are only interested in the resistor value for one specific LED color (and also only one type as a color may be created using different techniques which results in different forward voltages), thus only one LED forward voltage has to be taken into consideration. Also we assume that the USB voltage is 5.0 Volts which is okay, as we will see. | |||
Version vom 15. April 2012, 02:15 Uhr
Choosing the right column resistors for your LED cube requires you to consider several factors:
- Suitability of the cube base for different colors
- Expected USB voltage
- Voltage drop on the microcontroller
- Voltage drop on the transistor array
- Voltage drop on the LED
For now, we are only interested in the resistor value for one specific LED color (and also only one type as a color may be created using different techniques which results in different forward voltages), thus only one LED forward voltage has to be taken into consideration. Also we assume that the USB voltage is 5.0 Volts which is okay, as we will see.