is there a different method that can give a gain? because at the level of the ttl signal the led was not bright enough since the typical forward voltage of the led is 3.8V and the ttl is only 3V
is there a different method that can give a gain? because at the level of the ttl signal the led was not bright enough since the typical forward voltage of the led is 3.8V and the ttl is only 3V
Hi, sorry to bring this up again. The circuit finally worked, it managed to send an amplified square pulse to the LED. I did it using the original design with the 2N2369A transistor. But now the pulse has this strange teeth-like shape as shown in the picture. Is it due to the transistor or the reflections of the BNC cable or something else? I'm wondering if there is a way to fix this.