Audioguru again
- Joined Oct 21, 2019
- 6,671
Like most transistors, the BD941 is fully saturated when used as a switch when its base current is 1/10th its collector current.
Its hFE is when it is NOT a switch but is an amplifier with at least 2V Vce.
I do not know the output voltage of the Arduino when its produces a current of +10mA but it is surely less than +5V.
Then the BD941 is not saturated and gets hot, with dimmed LEDs.
Its hFE is when it is NOT a switch but is an amplifier with at least 2V Vce.
I do not know the output voltage of the Arduino when its produces a current of +10mA but it is surely less than +5V.
Then the BD941 is not saturated and gets hot, with dimmed LEDs.