Background;
Im making this little circuit to identify a cable in a bundle o f cables, I tried a tracer but dont work. It can point anything beyond 4m. (will make a post latter on).
The main Idea is to send a signal over the Main voltage line, wiring wile its live, and use a pich off wire tool to see if we got the signal on the wire,
after investigate, I found the general Idea, yet my circuit need some tuning.
Main AC = 120Vac peak to peak 60Hz
Injected signal = 5V Peak to peak 10Khz.
This is my circuit;
In the "no kHz signal" I got this readings; Channel Blue is at the output of the attenuator filter and green one is the output at the amplifier stage;
An if I turn on the Khz signal;
So, In the filter of the mains I got a very small voltage even when the circuit is off, there is a way to "center" it to groud to avoid in the real circuit this can be a a positive pulse and trigger the circuit?
If I got a voltage why the led is not turning ON ?
I make the test before to add another amplification stage, a Factor 4 will suit this up?
There a way to "filter" the spikes and make a clean Vcc for the Led to turn ON? I know on that freq, might not be necessary.
Should I try to use an OPAM instead?
Im struggling with the basics, Im not very familiar with the Analog systems.
I will upload the file on proteus.
Thanks for your help and comments.
-Alex.
Im making this little circuit to identify a cable in a bundle o f cables, I tried a tracer but dont work. It can point anything beyond 4m. (will make a post latter on).
The main Idea is to send a signal over the Main voltage line, wiring wile its live, and use a pich off wire tool to see if we got the signal on the wire,
after investigate, I found the general Idea, yet my circuit need some tuning.
Main AC = 120Vac peak to peak 60Hz
Injected signal = 5V Peak to peak 10Khz.
This is my circuit;
In the "no kHz signal" I got this readings; Channel Blue is at the output of the attenuator filter and green one is the output at the amplifier stage;
An if I turn on the Khz signal;
So, In the filter of the mains I got a very small voltage even when the circuit is off, there is a way to "center" it to groud to avoid in the real circuit this can be a a positive pulse and trigger the circuit?
If I got a voltage why the led is not turning ON ?
I make the test before to add another amplification stage, a Factor 4 will suit this up?
There a way to "filter" the spikes and make a clean Vcc for the Led to turn ON? I know on that freq, might not be necessary.
Should I try to use an OPAM instead?
Im struggling with the basics, Im not very familiar with the Analog systems.
I will upload the file on proteus.
Thanks for your help and comments.
-Alex.