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Thanks for the replies. The HIGH voltage od signal od 5V, LOW is 0V. About LED current and voltage... I think there should be values just to make LED lighting and visible. I thought about pnp, but I am not sure how to match IT with my voltage levels of signal.
Hello
I have a question about driving LED in different, inverted way: the LED should light on when the signal/state is LOW and the same LED should be turned off when the signal is HIGH.
I have attached a schematic which this solution with two npn transistors to do it simply without specific...
Hello!
I would like to ask if any of you have come across this type of connection of bipolar transistors:
I don't remember the rest of the circuit - I draw it from my memory. But I am sure about the direction and type of the transistors themselves.
In order to adopt some model of GND, it...
Hello!
I'm intensively looking for a specific device. As you know, there are devices called FM transmitters for use in old cars, in which there are still old radios without a USB interface. Such a device in a sense "impersonates" a radio channel, giving itself music on a given frequency, which...
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