Hi all... am new around here...
Well, I have finished fabricating the sonar circuit which I got its schematic from: **broken link removed**
Unfortunately, it does not work and am not professional in electronics, so I can not identify the problem. The problem is, all the LEDs are slightly lit, and it stays like that even if I move something near the trandsduecers.
I gave the circuit to someone to check and he told be that the receiver receives the signal, how ever it does not reach Q8 transistor? He says that the transistor I used is wrong and that it should be a pnp, not npn, is he correct? And which transistor should I use for Q8? Or do I have another problem?
Thanks
Well, I have finished fabricating the sonar circuit which I got its schematic from: **broken link removed**
Unfortunately, it does not work and am not professional in electronics, so I can not identify the problem. The problem is, all the LEDs are slightly lit, and it stays like that even if I move something near the trandsduecers.
I gave the circuit to someone to check and he told be that the receiver receives the signal, how ever it does not reach Q8 transistor? He says that the transistor I used is wrong and that it should be a pnp, not npn, is he correct? And which transistor should I use for Q8? Or do I have another problem?
Thanks