PWM and LED
- Thread starter xtech007
- Start date
The 180 Ohm resistor is neither correct nor incorrect. You can use any value resistor from about 120 ohms up to about 4K Ohms depending upon the max brightness required at 100 percent duty.
Given the same series resistance, due to voltage droop at the Picaxe Output Pin under loads > ~2 ma, the LED will be brighter when using a transistor switch than from the I/O pin.
Given the same series resistance, due to voltage droop at the Picaxe Output Pin under loads > ~2 ma, the LED will be brighter when using a transistor switch than from the I/O pin.
Ah transistors!
Did used transistors in the past, and learned a lot , specially about the base transistor required to saturate the base!
For now was using the pin from the 28x1 to show my 9yr old son about picaxe and wiring in the process .
For now he really understand how to wire an LED to the IC and the high and low comands, also letpins syntax.
So as a bonus will teach him to fade the led using PWM.
But transistors are comming soon!
Did used transistors in the past, and learned a lot , specially about the base transistor required to saturate the base!
For now was using the pin from the 28x1 to show my 9yr old son about picaxe and wiring in the process .
For now he really understand how to wire an LED to the IC and the high and low comands, also letpins syntax.
So as a bonus will teach him to fade the led using PWM.
But transistors are comming soon!