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Use a LM311 or similar comparator. Power it with 7VDC to pin 8 and ground to pin 4.
Tie the + input pin 3 to your 0 to 3V shutter signal. ( assuming signal goes high when shutter is open )
Wire a 18K resistor in series with a 10K resistor. Tie the 18K to 7VDC and the 10K to ground. tie the...
The EAS system I worked on used 2 transmitters near the doorway. One carrier and one modulated with a 1khz signal.
The "TAG" had a stamped inductor with a single diode on it placed such that the inductor formed 2 tuned tank circuits.
One tuned to the mid range of the 2 transmitters and a second...
You need to be care full how much current you pull on the line. If you pull about 10ma possibly less the phone company will detect that current draw as an "OFF-HOOK" phone. This will disrupt your phone service as anyone calling when "OFF-HOOK" will get a busy signal.
Also when phone rings you...
Usually its 50% Duty Cycle and most ADC's use a leading edge to clock and you want to maintain that to keep slew from effecting you.
However your sample rate should be about 10X in maximum incoming frequency you wish to sample in order to get a good result. Since the input signal is usually not...
Sounds to me like your Nvidia software is redefining your Realtek audio as Nvidia. This seems to be a common problem doing a quick search on the web.
I believe part of this is due to the Nvidia motherboards that are available with both Nvidia video and audio.
I'd recommend goggling for...
Your Bias voltage to the + input should be Vin/2 not ground if using a single ended supply as shown.
If you use the circuit as shown you will only get 1/2 waveform out.
either change the bias voltage or use a +v and -V supply.
Barry is correct in that the signal to the LED can be used directly along with a driver circuit.He also correctly points out the issues with a motor.
A gear reducer may work, however you should also consider using a stepper motor that will much better control than a normal motor.
The only problem is that at 2.4 GHZ your physical layout becomes just as important as the schematic.
Be sure to get a layout along with the schematic to have any chance of making a working amp.
If you posted at least some information about the resonator you're trying to use people would not have to guess what the heck you want.
Any answer you get here without giving us more information will be a GUESS!!!
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