hi! I've got a question regarding transistors. When using it as a switch, is it possible to only output the collector signal?
I put together a 555 astable with a frequency of a few kilohertz and outputted it to a 2N3904's base. I routed music audio to the collector, and the emitter was routed to my speakers. I could hear AM ('ring modulation'; whatever you wanna call it) but I could also hear the 555's output wave. Is it possible to hear only the music audio instead of having a square wave too? Do I have to make the output of the 555 equal to ~0.7V, perhaps? If so, would a potential divider work?
Thanks.
Note:
I thought of having the 555 outputted to an inductor, which would be placed by a reed switch. Would an inductor's magnetic field be strong enough to close a reed switch?
I put together a 555 astable with a frequency of a few kilohertz and outputted it to a 2N3904's base. I routed music audio to the collector, and the emitter was routed to my speakers. I could hear AM ('ring modulation'; whatever you wanna call it) but I could also hear the 555's output wave. Is it possible to hear only the music audio instead of having a square wave too? Do I have to make the output of the 555 equal to ~0.7V, perhaps? If so, would a potential divider work?
Thanks.
Note:
I thought of having the 555 outputted to an inductor, which would be placed by a reed switch. Would an inductor's magnetic field be strong enough to close a reed switch?