Recent content by bonanz1

  1. bonanz1

    audio mixer - graphical display of sound output? compare 2 signals?

    I haven't taken the one mixer apart yet, I was kinda hoping I could compare the cut in times without taking them apart first.
  2. bonanz1

    audio mixer - graphical display of sound output? compare 2 signals?

    here is essentially what I want to be able to graph but I'm not so concerned about fader travel, maybe plotting volume against time would suffice
  3. bonanz1

    audio mixer - graphical display of sound output? compare 2 signals?

    Hello, I have a problem with a dj mixer.  There is a decay on the crossfader. for a scratch dj the cut in time on the crossfader is very important.  My particular mixer seems to have a problem with a rc time constant most likely that causes a slight muddy sound when doing fast and complicated...
  4. bonanz1

    Led display Digital Voltmeter question

    Okay i've done some playing around with this circuit and i cannot get it to work for my application. I'm not worried about switching terminals because i am not using it as a typical dmm i'm using it to display a voltage in a circuit that will always be positive. I am using the LM2907 frequency...
  5. bonanz1

    Led display Digital Voltmeter question

    okay great, because i only need the circuit to measure positive voltages, the input will never go negative. when you say pin 3 do you mean pin 3 on the pcb? not on the chip right?
  6. bonanz1

    Led display Digital Voltmeter question

    This circuit came up at the perfect time! couldnt have asked for a more perfect design for what i need right now, only problem is i don't have a -5 volt supply.  What would happen if i grounded that pin rather than using -5.  would that simply not allow for negative voltages to be measured...
  7. bonanz1

    frequency to voltage noise filtering

    Hello all, i want to display the speed of a model train, the optical sensors (link below) are placed around the track, and i am using the lm2907 to pick up a frequency off of them and change it to a voltage. then i was feeding that voltage into some cascaded LM3914 bargraph drivers to display...
  8. bonanz1

    comparator= inverter?

    is there a way to use a comparator as a digital logic inverter?
  9. bonanz1

    Temporary power shut off

    I think i may be able to achieve my desired result with a S-R flip flop. Does anyone have any thoughts on this method? and i've tried looking for an SR flip flop chip number but does it not exist? or would i have to just implement it with a dual package NOR. Thanks bonanz
  10. bonanz1

    Temporary power shut off

    Hello all, I'm having a problem figuring out how to go about achieving my desired results for my train's braking system. If a ttl level signal goes high i need to shut the power off to the Linear induction motor coils. These coils may have up to about 1A running to them to drive the train...
  11. bonanz1

    Oscilloscope project

    Hey guys, Does anyone know of any info on making a homemade oscilloscope that can display either through the pc or something similar. it seems like something that someone would probablyhave ventured trying before. bonanz
  12. bonanz1

    time delay/ hold circuit

    I know this is something simple but i've done a little searching and can't find what i'm looking for and i can't work it up form scratch for the life of me.... I'm looking for digital logic circuit/gate that everything starts at 0 (low) and then if high is input, the output is high, but only...
  13. bonanz1

    frequency to voltage conversion question

    Hello all, I am working on a model scale maglev train. along the track there are sensors that detect the positino of the vehicle and power current through a respective coil to form a LIM. I wanted to find an easy way to monitor the speed of the train by using the sensor frequency (evenly...
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