Led Transistor Schaltung. When the inverter input is 12v the transistor in the first inverter will turn on and the led will come on and the inverter output voltage will be 0 2v. The transistor used in this experiment was picked randomly from a box of salvaged components it was a bc238b npn type low power general purpose transistor.
Schematics Of Delabs Constant Current Source Led Drive Current Source Constant Current Electronic Kits from br.pinterest.com
We can also say that this is a led running effect chaser circuit this is an easy circuit and it can easily construct at home by even who beginner in this field. The first inverter output is connected to the input of the second inverter. An led typically needs about 15ma.
50ma is now sufficient to drive and light the led.
When the inverter input is 12v the transistor in the first inverter will turn on and the led will come on and the inverter output voltage will be 0 2v. An led typically needs about 15ma. Therefore the current will be amplified by 100 which is 0 5ma 100 50ma. The 0 2v at the input of the second inverter is small enough that the second transistor is turned off.
